WO2022002005A1 - Sequence generation method and related device - Google Patents

Abstract

Disclosed are a sequence generation method and a related device. The sequence generation method can be implemented by means of interaction between a network device and a terminal device. The network device determines a pilot frequency configuration parameter of the terminal device, and sends the pilot frequency configuration parameter to the terminal device. The terminal device can determine, according to an orthogonal matrix indicated by the pilot frequency configuration parameter and from the orthogonal matrix, some or all elements in each column of the orthogonal matrix, so as to constitute a pilot frequency sequence of the terminal device. It can be seen that the pilot frequency sequence generated by using the method is selected from the orthogonal matrix, such that the number of pilot frequency sequences tends to be infinite, thereby meeting the requirement of massive terminals in an mMTC scenario, and facilitating the increase in system capacity. Moreover, the processing complexity at a receiving end is reduced by means of the design of pilot frequencies.

Description

A sequence generation method and related equipment

This application claims the priority of the Chinese patent application with the application number 202010604528.5 and the application title "A Sequence Generation Method and Related Equipment" filed with the State Intellectual Property Office of China on June 29, 2020, and claimed in August 2020 On the 12th, the priority of the Chinese patent application with the application number 202010808797.3 and the application title of "A Sequence Generation Method and Related Equipment" was submitted to the State Intellectual Property Office of China, the entire contents of which are incorporated in this application by reference.

technical field

The present application relates to the field of communication technologies, and in particular, to a sequence generation method and related equipment.

Background technique

New radio access technology (NR) covers enhanced mobile broadband (eMBB), ultra-reliable low latency communications (uRLLC) and massive machine type communications (massive machine type communications, mMTC) these three scenarios. Among them, in the mMTC scenario, there will be a large number of terminal devices to be accessed in the cell. A large number of terminal devices to be accessed may initiate random access to a network device (eg, a base station) when data transmission is required. Correspondingly, the network device receives the random access request from the terminal device, and can complete user detection and/or data demodulation and decoding through the pilot frequency.

Among them, since there are a large number of terminal devices to be accessed in the mMTC scenario, but the number of pilots designed in the current NR is limited, the terminal device may select the same pilot during random access, thus improving the user competition for the same time-frequency Pilot collision probability at resource time.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a sequence generation method and related equipment. The sequence generation method can increase the number of pilots, which is beneficial to reduce the pilot collision probability during random access of terminal devices in a scenario where a large number of terminal devices transmit, and improve the The system capacity is reduced, and the processing complexity of the receiving end is reduced through the design of the pilot frequency.

In a first aspect, an embodiment of the present application provides a method for generating a sequence, and the method can be executed by a terminal device. The terminal device receives a pilot configuration parameter sent by a network device, where the pilot configuration parameter includes a first parameter used to configure an orthogonal matrix used by the terminal device, and a part of each column of the orthogonal matrix or All elements constitute a pilot sequence or pilot subsequence. The terminal device determines the pilot sequence of the terminal device from the orthogonal matrix.

It can be seen that, according to the orthogonal matrix indicated by the pilot configuration parameter, the terminal device can determine from the orthogonal matrix some or all of the elements in each column of the orthogonal matrix to constitute the pilot sequence of the terminal device. Using an orthogonal matrix can make the number of pilot sequences tend to be infinite, meet the needs of massive terminals in the mMTC scenario, and help improve system capacity. Since the pilot sequence of the terminal equipment is selected from an orthogonal matrix, the interference between pilots sent by different terminal equipment can be reduced, thereby reducing the processing complexity of the receiving end.

In one possible design, the first parameter includes the total number of pilots N and/or the type of orthogonal matrix.

It can be seen that the type of the orthogonal matrix in the first parameter determines that the pilot sequence of the terminal device is selected from the orthogonal matrix, which can reduce the processing complexity of the receiving end.

In a possible design, the pilot configuration parameter further includes a pilot sequence length L and/or a second parameter, where the second parameter is used to configure the column number of the pilot sequence that can be used to form the terminal device in the orthogonal matrix gather.

It can be seen that the length of the pilot sequence and the second parameter can determine part or all of the elements in which column of the orthogonal matrix the pilot sequence of the terminal device is selected from.

In a possible design, the terminal equipment determines the pilot sequence of the terminal equipment from the orthogonal matrix, including:

The terminal device determines an orthogonal matrix X with a dimension of N×N according to the total number of pilots N;

The terminal device selects L elements from one or more column elements of the N×N orthogonal matrix X, where the L elements constitute the pilot sequence of the terminal device.

It can be seen that, for a terminal device, the pilot sequence of the terminal device is composed of L elements in one or more columns of the N×N orthogonal matrix X.

In a possible design, the terminal device determines an orthogonal matrix X with a dimension of N×N according to the total number of pilots N, including:

The terminal device determines, according to the total number of pilots N and the matrix type, an orthogonal matrix X of a matrix type with a dimension of N×N.

In a possible design, when the terminal device selects L elements from elements of multiple columns of an N×N orthogonal matrix X, the number and/or position of the selected elements in each column are the same.

It can be seen that, for each cell, when the terminal equipment in different cells selects L elements from the elements of the multiple columns of the N×N orthogonal matrix X to form a pilot sequence, the number of elements selected in each column and/or The location can be the same.

In a possible design, the terminal device selects L elements from one or more column elements of the N×N orthogonal matrix X, including:

According to the length L of the pilot sequence, the terminal device selects L elements from the elements in one or more columns of the orthogonal matrix X by random extraction.

It can be seen that when the terminal device determines the pilot sequence of the terminal device from the orthogonal matrix, a random extraction method can be adopted, and this method adopts random numbers to perform random extraction, and the algorithm complexity is low.

In a possible design, the terminal device selects L elements from one or more column elements of the N×N orthogonal matrix X, including:

The terminal equipment selects L elements from the elements in one or more columns of the orthogonal matrix X according to the cell identifier of the cell where the terminal equipment is located.

It can be seen that when the terminal equipment determines the pilot frequency sequence of the terminal equipment from the orthogonal matrix, the formula can be used to calculate the pilot frequency sequence of the terminal equipment.

In a possible design, L elements constitute the pilot sequence of the terminal device, including:

The terminal equipment scrambles the L elements, and the L elements obtained after scrambling constitute a pilot sequence of the terminal equipment.

It can be seen that, for each cell, terminal devices in different cells can scramble the selected L elements to reduce interference between different cells.

In a possible design, the terminal device may also determine the length L of the pilot sequence based on the configured time-frequency resource for sending the pilot.

It can be seen that the length of the pilot sequence may be determined by the terminal device according to the time-frequency resources occupied by the pilot.

In a possible design, the terminal equipment performs precoding processing on the L elements, and the L elements obtained after the precoding processing constitute a pilot sequence of the terminal equipment.

It can be seen that the terminal device can perform precoding processing on the selected L elements to reduce the peak-to-average ratio of the pilot sequence, which is beneficial to avoid signal distortion.

In a possible design, the terminal equipment determines the pilot sequence of the terminal equipment from the orthogonal matrix, including:

The terminal device determines an orthogonal matrix X with a dimension of N×N according to the total number of pilots N;

The terminal device determines an L×N matrix X′ from the orthogonal matrix X according to the length L of the pilot sequence;

The terminal device determines the terminal device's pilot sequence from one or more columns in the matrix X'.

In a possible design, the terminal device determines an L×N matrix X′ from the orthogonal matrix X according to the length L of the pilot sequence, including:

The terminal device randomly extracts L rows from the orthogonal matrix X according to the length L of the pilot sequence, and determines an L×N matrix X′.

In a possible design, the terminal device determines an L×N matrix X′ from the orthogonal matrix X according to the length L of the pilot sequence, including:

The terminal equipment determines an L×N matrix X′ according to the pilot sequence length L and the cell identifier of the cell where the terminal equipment is located.

In one possible design, the matrix X' is the same for different cells.

In a second aspect, an embodiment of the present application provides a method for generating a sequence, and the method can be executed by a network device. The network device refers to a network device in an access network, such as a base station. The network device acquires a pilot configuration parameter of the terminal device, where the pilot configuration parameter includes a first parameter for configuring an orthogonal matrix used by the terminal device. Some or all of the elements in each column of the orthogonal matrix constitute a pilot sequence or a pilot subsequence. The network device sends the pilot configuration parameter to the terminal device.

It can be seen that the network device can set the pilot configuration parameters of the terminal device, and send the pilot configuration parameters to the terminal device, so that the terminal device can determine from the orthogonal matrix that some or all of the elements in each column of the orthogonal matrix constitute the The pilot sequence of the terminal equipment. Using an orthogonal matrix can make the number of pilot sequences tend to be infinite, meet the needs of massive terminals in the mMTC scenario, and help improve system capacity. Since the pilot sequence of the terminal equipment is selected from an orthogonal matrix, the interference between pilots sent by different terminal equipment can be reduced, thereby reducing the processing complexity of the receiving end.

In one possible design, the first parameter includes the total number of pilots N and/or the type of orthogonal matrix.

In a possible design, the pilot configuration parameter further includes a pilot sequence length L and/or a second parameter, where the second parameter is used to configure the column number of the pilot sequence that can be used to form the terminal device in the orthogonal matrix gather.

In a possible design, there is a preset corresponding relationship between the total number N of pilots and the length L of the pilot sequence.

In a possible design, the orthogonal matrix type is preset; or, there is a preset corresponding relationship between the orthogonal matrix type and the total number N of pilots and/or the length L of the pilot sequence.

In one possible design, the second parameter includes one or more of the following:

The cell identifier of the cell where the terminal equipment is located;

Terminal identification of the terminal equipment;

the time-frequency location parameter associated with the pilot; or,

Radio resource control RRC signaling parameters configured by the network device.

In a possible design, the network device determines the orthogonal matrix X according to the total number of pilots N and/or the type of the orthogonal matrix;

The network device determines the L×N matrix X′ from the orthogonal matrix X according to the length L of the pilot sequence;

The network device determines that one or more columns in the matrix X' constitute a pilot sequence set;

The network device sends one or more pilot sequences in the set of pilot sequences to one or more corresponding terminal devices; or, the network device sends the set of pilot sequences to the terminal device, so that the terminal device can download the pilot sequence from the set of pilot sequences. The pilot sequence of the terminal equipment is selected from the sequence set.

In a possible design, the network device determines the orthogonal matrix X according to the total number of pilots N and/or the type of the orthogonal matrix;

The network device determines the L×N matrix X′ from the orthogonal matrix X according to the pilot sequence length L; the network device determines the L×N matrix X″ after precoding processing according to the matrix X′ and the precoding matrix.

In a third aspect, an embodiment of the present application provides a terminal device, where the terminal device includes a transceiver unit and a processing unit;

The transceiver unit is configured to receive pilot configuration parameters sent by the network device, where the pilot configuration parameters include a first parameter used to configure an orthogonal matrix used by the terminal equipment, and some or all of the elements in each column of the orthogonal matrix constitute a pilot frequency sequence or pilot subsequence;

The processing unit is used for determining the pilot sequence of the terminal equipment from the orthogonal matrix.

In one possible design, the first parameter includes the total number of pilots N and/or the type of orthogonal matrix.

In a possible design, the pilot configuration parameter further includes a pilot sequence length L and/or a second parameter, where the second parameter is used to configure the column number of the pilot sequence that can be used to form the terminal device in the orthogonal matrix gather.

In a possible design, the processing unit is used to determine the pilot sequence of the terminal equipment from the orthogonal matrix, and is specifically used for:

According to the total number of pilot frequencies N, determine an orthogonal matrix X with a dimension of N×N;

L elements are selected from one or more column elements of the N×N orthogonal matrix X, and the L elements constitute the pilot sequence of the terminal device.

In a possible design, the processor is configured to determine an orthogonal matrix X with a dimension of N×N according to the total number N of pilot frequencies, and is specifically used for:

According to the total number of pilots N and the matrix type, an orthogonal matrix X of the matrix type with dimension N×N is determined.

In a possible design, when the processing unit selects L elements from elements of multiple columns of an N×N orthogonal matrix X, the number and/or position of the selected elements in each column are the same.

In a possible design, the processing unit is configured to select L elements from one or more column elements of the N×N orthogonal matrix X, specifically for:

L elements are randomly selected from one or more columns of the orthogonal matrix X; or,

According to the cell identifier of the cell where the terminal device is located, L elements are selected from the elements in one or more columns of the orthogonal matrix X.

In one possible design, the processing unit is also used to:

The L elements are scrambled, and the L elements obtained after scrambling constitute the pilot sequence of the terminal equipment.

In a possible design, the processing unit is used to determine the pilot sequence of the terminal equipment from the orthogonal matrix, and is specifically used for:

According to the total number of pilot frequencies N, determine an orthogonal matrix X with a dimension of N×N;

According to the length L of the pilot sequence, determine the matrix X′ of L×N from the orthogonal matrix X;

The pilot sequence of the terminal device is determined from one or more columns in the matrix X'.

In a possible design, the processing unit is configured to determine the L×N matrix X′ from the orthogonal matrix X according to the length L of the pilot sequence, and is specifically used for:

According to the length L of the pilot sequence, L rows are randomly selected from the orthogonal matrix X to determine an L×N matrix X′.

In a possible design, the processing unit is configured to determine the L×N matrix X′ from the orthogonal matrix X according to the length L of the pilot sequence, and is specifically used for:

An L×N matrix X′ is determined according to the length L of the pilot sequence and the cell identifier of the cell where the terminal equipment is located.

In one possible design, the matrix X' is the same for different cells.

In a fourth aspect, an embodiment of the present application provides a network device, where the network device includes a processing unit and a transceiver unit;

A processing unit, configured to acquire pilot configuration parameters of the terminal equipment, where the pilot configuration parameters include a first parameter used to configure an orthogonal matrix used by the terminal equipment, and some or all of the elements in each column of the orthogonal matrix constitute a pilot sequence or pilot subsequence;

The transceiver unit is used for sending pilot frequency configuration parameters to the terminal equipment.

In one possible design, the first parameter includes the total number of pilots N and/or the type of orthogonal matrix.

In a possible design, the pilot configuration parameter further includes a pilot sequence length L and/or a second parameter, where the second parameter is used to configure the column number of the pilot sequence that can be used to form the terminal device in the orthogonal matrix gather.

In a possible design, there is a preset corresponding relationship between the total number N of pilots and the length L of the pilot sequence.

In a possible design, the orthogonal matrix type is preset, or there is a preset corresponding relationship between the orthogonal matrix type and the total number N of pilots and/or the length L of the pilot sequence.

In one possible design, the second parameter includes one or more of the following:

The cell identifier of the cell where the terminal equipment is located;

Terminal identification of the terminal equipment;

the time-frequency location parameter associated with the pilot; or,

Radio resource control RRC signaling parameters configured by the network device.

In a fifth aspect, an embodiment of the present application provides a terminal device, where the device has a function of implementing the sequence generation method provided in the first aspect. This function can be implemented by hardware or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a sixth aspect, an embodiment of the present application provides a network device, and the device has a function of implementing the sequence generation method provided in the second aspect. This function can be implemented by hardware or by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above functions.

In a seventh aspect, an embodiment of the present application provides a communication system, where the communication system includes the terminal device provided in the third aspect or the fifth aspect and the network device provided in the fourth aspect or the sixth aspect.

In an eighth aspect, embodiments of the present application provide a computer-readable storage medium, where the readable storage medium includes a program or an instruction, and when the program or instruction is run on a computer, the computer executes the first aspect or the first aspect. method in any of the possible implementations.

In a ninth aspect, an embodiment of the present application provides a computer-readable storage medium, where the readable storage medium includes a program or an instruction, when the program or instruction is run on a computer, the computer executes the second aspect or the second aspect. method in any of the possible implementations.

In a tenth aspect, an embodiment of the present application provides a chip or a chip system, the chip or chip system includes at least one processor and an interface, the interface and the at least one processor are interconnected through a line, and the at least one processor is used for running a computer program or instruction, to perform the method described in any one of the first aspect or any of the possible implementations of the first aspect.

In an eleventh aspect, an embodiment of the present application provides a chip or a chip system, the chip or chip system includes at least one processor and an interface, the interface and the at least one processor are interconnected through a line, and the at least one processor is used for running a computer program or instruction , to perform the method described in any one of the second aspect or any possible implementation manner of the second aspect.

Wherein, the interface in the chip may be an input/output interface, a pin or a circuit, or the like.

The chip system in the above aspects may be a system on chip (system on chip, SOC), or a baseband chip, etc., where the baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, an interface module, and the like.

In a possible implementation, the chip or chip system described above in this application further includes at least one memory, where instructions are stored in the at least one memory. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (eg, a read-only memory, a random access memory, etc.).

A twelfth aspect, embodiments of the present application provide a computer program or computer program product, including codes or instructions, when the codes or instructions are run on a computer, the computer executes the first aspect or any one of the first aspects may be implemented method in method.

In a thirteenth aspect, the embodiments of the present application provide a computer program or computer program product, including codes or instructions, when the codes or instructions are run on a computer, the computer executes the second aspect or any one of the second aspects may be implemented method in method.

Description of drawings

FIG. 1 is a schematic diagram of a communication system provided by an embodiment of the present application;

2 is a schematic flowchart of a sequence generation method provided in an embodiment of the present application;

3a is a schematic diagram of an orthogonal matrix provided by an embodiment of the present application;

3b is a schematic diagram of an orthogonal matrix and a pilot sequence provided by an embodiment of the present application;

4 is a schematic diagram of a pilot sequence of a terminal device according to an embodiment of the present application;

5 is a schematic diagram of performance analysis of a network device using an orthogonal matrix according to an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of another terminal device provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a network device according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of another network device according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

New radio access technology (NR) covers enhanced mobile broadband (eMBB), ultra-reliable low latency communications (uRLLC) and massive machine type communications (massive machine type communications, mMTC) these three scenarios. Among them, the eMBB scenario emphasizes high throughput, the uRLLC scenario emphasizes high reliability and low latency, and the mMTC scenario emphasizes massive connections.

Among them, in the mMTC scenario, there will be a large number of terminal devices to be accessed in the cell. For example, these terminal devices can be mobile phones or devices in the Internet of Things. Please refer to FIG. 1 , which is a schematic diagram of a communication system provided by an embodiment of the present application. The communication system includes network equipment and terminal equipment, and can support access of a large number of terminal equipment. For example, Figure 1 includes one network device and four terminal devices. Wherein, terminal equipment 1 and terminal equipment 2 are located in cell 1, terminal equipment 3 and terminal equipment 4 are located in cell 2, and the above four terminal equipments all access network equipment. The network device and terminal device in FIG. 1 are only an example, and the number of terminal devices accessed by the network device is not limited in this embodiment.

Wherein, the network device may be any device with a wireless transceiver function, which provides wireless communication services for terminal devices within the coverage. The network equipment may include but is not limited to: an evolved base station (NodeB or eNB or e-NodeB, evolutional NodeB) in a long term evolution (long term evolution, LTE) system, a new generation radio access technology (new radio access technology, NR) The base station (gNodeB or gNB) or the transceiver point (transmission receiving point/transmission reception point, TRP) in 3GPP, the base station of the subsequent evolution of 3GPP, the access node in the WiFi system, the wireless relay node, the wireless backhaul node, the Internet of Vehicles, Equipment, satellites, etc. that undertake the function of base stations in D2D communication and machine communication.

The terminal device may be a device with a wireless transceiver function, or the terminal device may also be a chip. The terminal device may be a user equipment (user equipment, UE), a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (virtual reality, VR) terminal device, an augmented reality (augmented reality) , AR) terminal equipment, in-vehicle terminal equipment, wireless terminals in remote medical, wireless terminals in smart grid, wearable terminal equipment, Internet of Vehicles, D2D communication, sensors in machine communication, etc.

In the mMTC scenario, in order to reduce the signaling overhead caused by a large number of small packets, NR can adopt a simplified signaling process design. For example, in NR, a grant free (GF) transmission or a 2-step random access channel (2-step RACH) process is used for access and data transmission. Among them, for uplink transmission, the terminal device will actively select a resource for data transmission. Since there is no pre-scheduling of the base station, multiple terminal devices may compete for the same block of time-frequency resources. Correspondingly, as the receiving end, the base station needs to complete the work of active user detection and/or data demodulation and decoding through a pilot sequence (eg, a Preamble sequence or a DMRS sequence).

Considering that in the mMTC scenario, the number of potential users is very large, this puts forward higher requirements for the design of the pilot sequence. In order to reduce the pilot frequency collision probability when users compete for the same resource (wherein, the pilot frequency collision means that multiple terminal equipments select the same pilot frequency), the system needs a larger number of pilot frequency sequences. And in order to reduce the interference between different pilot sequences, it is necessary to ensure that these pilot sequences have low correlation.

In the existing Long Term Evolution (Long Term Evolution, LTE) and NR, the pilot sequence usually adopts a ZC (Zadoff-Chu) sequence, or a pseudo random (pseudo random noise, PN) sequence.

For example, a network device can generate different PN sequences by configuring the same DMRS port for different terminal devices, but with different scrambling ID values, so that multiple terminal devices can share a DMRS port, but Different DMRS sequences are used for non-orthogonal transmission.

However, when multiple PN sequences are used for DMRS spreading, since the initial value of the PN sequence is related to the slot number, OFDM symbol number, and scrambling ID, that is, the correlation of DMRS sequences generated by different initial values of PN sequences will not be controlled. , the difference is large, and the non-orthogonal sequences will increase the interference between users. Especially for the mMTC scenario, the reference signal is not only used for channel estimation, but also used for user activity detection. The interference between the reference signals will reduce the accuracy of user detection and the performance of channel estimation.

For another example, the preamble in the NR random access process may use a ZC sequence. Among them, the preamble sequence group can be based on the reference sequence, and all preamble sequence groups can be obtained by means of cyclic shift (NR is the same as LTE, and supports up to 64 preamble sequences). However, when the preamble adopts more cyclic shifts or different root sequences to form a preamble sequence group, the non-orthogonal sequences will increase the interference between users and reduce the accuracy of user detection and the performance of channel estimation.

It can be seen that in the mMTC large connection scenario, a large number of users randomly access the collision problem, so the number of pilots needs to be greatly increased to reduce the probability of user collision; at the same time, in order to improve resource utilization, it is necessary to design non-orthogonal pilots, and the pilot design scheme simultaneously There is also a need to solve the problem of inter-cell interference and reduce the detection complexity.

In order to solve the above problem, an embodiment of the present application provides a sequence generation method, which can increase the number of pilot sequences, reduce the collision probability of random access of terminals in a transmission scenario of a large number of terminals, and improve system capacity.

The following will be described in conjunction with specific embodiments.

The embodiment of the present application provides a sequence generation method, please refer to FIG. 2 . The sequence generation method can be realized by the interaction between the terminal device and the network device, including the following steps:

S201, the network device acquires a pilot configuration parameter of the terminal device, where the pilot configuration parameter includes a first parameter used to configure an orthogonal matrix used by the terminal device, and some or all of the elements in each column of the orthogonal matrix constitute a pilot sequence or pilot subsequence.

By setting the pilot frequency configuration parameters of the terminal equipment, the network equipment can specify the pilot frequency sequences that the terminal equipment can use. Wherein, the pilot configuration parameter of the terminal device includes a first parameter for configuring an orthogonal matrix used by the terminal device. The first parameter may include, but is not limited to, the total number of pilots N and/or the type of orthogonal matrix, and the like.

The total number of pilots N represents the number of all pilots available for selection. In an embodiment, the total number of pilots may be the maximum number of users that can be accommodated in the cell where the terminal device is located. For example, the cell where the terminal equipment is located is cell 1, and cell 1 specifies that the maximum number of users that can be accommodated in this cell is 500. Then the total number of pilots in the pilot configuration parameters is 500.

Wherein, the orthogonal matrix type indicates what type of orthogonal matrix is used by the pilot sequence of the terminal device. In order to increase the number of pilot sequences and avoid inter-user interference, the embodiment of the present application proposes that the pilot sequences are selected from orthogonal matrices. Orthogonal matrix types may include but are not limited to discrete Fourier transform (discrete Fourier transform, DFT) matrix, inverse discrete Fourier transform (inverse discrete Fourier transform, IDFT) matrix, Hadamard (Hadamard) matrix, ZC matrix and other positive intersection matrix. The ZC matrix is generated by performing N cyclic shifts of the ZC sequence. The result of each cyclic shift constitutes a row or column of the ZC matrix. The root of the generated ZC sequence and the length of the ZC sequence satisfy a co-prime relationship.

Optionally, the orthogonal matrix type is preset, that is, the orthogonal matrix type may be specified in the protocol standard. Once the type of orthogonal matrix is determined by the protocol standard, the type of orthogonal matrix used by the terminal device is also determined. Then, the parameter value of the orthogonal matrix type may not be included in the pilot configuration parameters.

Optionally, the orthogonal matrix type may also have a preset corresponding relationship with the total number of pilots N and/or the length of the pilot sequence L, that is, the network device does not need to explicitly configure the parameter of the orthogonal matrix type. For example, the pilot configuration parameter includes the parameter of the total number of pilots N, then according to the preset correspondence between the total number of pilots N and the type of the orthogonal matrix, the terminal device can determine which type of orthogonal matrix to use.

Some or all of the elements in each column of the orthogonal matrix constitute a pilot sequence or a pilot subsequence. When there is only one pilot sequence of the terminal device, the pilot sequence is the pilot sequence of the terminal device. When the spectrum resources occupied by the terminal equipment are divided into multiple blocks of resources, each block of resources corresponds to one pilot subsequence, and all the pilot subsequences corresponding to the multiple blocks of resources are pilot subsequences of the terminal equipment.

Optionally, the terminal device may determine, according to the first parameter, an orthogonal matrix X with a dimension of N×N of a specified orthogonal matrix type. Then some or all of the elements in any column of the orthogonal matrix can constitute a pilot sequence or pilot subsequence of the terminal equipment.

For example, please refer to FIG. 3a, which is a schematic diagram of an orthogonal matrix provided by an embodiment of the present application. It can be seen that the orthogonal matrix is a square matrix with N rows and N columns. The elements of the i-th row and j-th column corresponding to the square matrix are x _ij . where i=0,1,2,...N, j=0,1,2,...N. The orthogonal matrix may be a DFT matrix, or may be other types of orthogonal matrices, which are not limited in this embodiment.

Some or all of the elements in any column of the orthogonal matrix may constitute a pilot sequence. For example, some elements in one column of the orthogonal matrix constitute a pilot sequence, as shown in Fig. 3b. Optionally, some elements in any column of the orthogonal matrix may also constitute a pilot subsequence, or, all elements in any column of the orthogonal matrix constitute a pilot sequence or a pilot subsequence. The embodiment is not limited.

In an example, the pilot configuration parameter of the terminal device further includes a pilot sequence length L and/or a second parameter. The pilot sequence length L represents the sequence length of the pilot sequence used by the terminal device. That is to say, the pilot sequence of the terminal device is composed of L elements, wherein the L elements are L elements selected from one or more columns of the orthogonal matrix X.

The length L of the pilot sequence can be calculated according to the time-frequency resources occupied by the pilot. For example, the terminal device may calculate the pilot sequence length L based on the time-frequency resource configured by the network device for sending the pilot.

Optionally, for some applications, the pilot sequence length L may be a preset fixed value. For example, when the pilot is a preamble, the size of the time-frequency resource occupied by the pilot is fixed, and the length L of the pilot sequence is also a preset fixed value correspondingly.

Optionally, there is a preset corresponding relationship between the pilot sequence length L and the total number N of pilots. That is to say, when the network device is configured with the total number N of pilots, the length of the pilot sequence may not be explicitly configured. The terminal device may determine the length L of the pilot sequence of the terminal device according to the preset correspondence between the total number of pilots N and the length L of the pilot sequence.

Optionally, when the network device is configured with the sequence length L, the total number of pilots N may not be explicitly configured, and the terminal device may determine the terminal device according to the preset correspondence between the total number of pilots N and the length of the pilot sequence L. The total number of pilots N.

The second parameter is used to configure a set of column numbers in the orthogonal matrix that can be used to form a pilot sequence of the terminal device. That is, the second parameter may indicate the pilot usage range of the terminal device. Wherein, for a certain designated terminal equipment, the network equipment may only allocate designated pilot frequencies to the terminal equipment within a certain range, then the number M of pilot frequency sequences that can be used by the terminal equipment is less than the total number N of pilot frequencies.

For example, the second parameter is used to configure the starting column number and ending column number of the pilot sequence in the orthogonal matrix that can be used to form the terminal equipment. Assuming that the total number of pilots N is 500, the orthogonal matrix can be used to form the terminal equipment. The starting column number of the frequency sequence is 30 and the ending column number is 60. Then the terminal device can determine, according to the second parameter, that the start column number of the terminal device's pilot sequence in the 500 sequences of the orthogonal matrix is 30, and the end column number is 60, so as to determine that the terminal device's pilot sequence can be determined by the positive sequence. It consists of all or part of the elements in the 30th to 60th columns of the intersection matrix.

In one embodiment, the second parameter includes the starting column number and the ending column number, or the second parameter includes the starting column number and the number of columns, or the second parameter includes the ending column number and the number of columns. In another embodiment, the number of columns can be understood as the number of available pilot sequences.

Optionally, for a specified terminal device, the network device can also allocate the specified pilot frequency to the terminal device from all N pilot frequency sequences, then the number M of pilot frequency sequences that can be used by the terminal device is equal to the pilot frequency. total N.

Optionally, the column number sets of the pilot sequences of the terminal equipments in the same cell may be completely different, may be partially the same, or may be completely the same.

For example, if the total number of pilots N of the cell is 500, it is assumed that the terminal equipments requesting access to the cell at this time include three terminal equipments, namely terminal equipment 1, terminal equipment 2 and terminal equipment 3. Assuming that there are 20 pilot sequences available to each terminal device, the network device can configure the set of column numbers of the available pilot sequences for terminal device 1 in the 1st to 20th columns in the orthogonal matrix; The 21st to 40th columns are the column number sets of available pilot sequences of terminal equipment 2; the 41st to 60th columns in the configuration orthogonal matrix are the column number sets of available pilot sequences of terminal equipment 3. At this time, the available pilot sequences of terminal equipment 1, terminal equipment 2 and terminal equipment 3 are completely different.

For another example, if the total number N of pilots in the cell is small (assuming there are 40 pilots in total), it is assumed that the terminal equipments requesting access to the cell include three terminal equipments: terminal equipment 1, terminal equipment 2 and terminal equipment 3. Assuming that there are 20 pilot sequences available to each terminal device, the network device can configure the set of column numbers of the pilot sequences of terminal device 1 in the first column to the 20th column in the orthogonal matrix; The 21st to 40th columns are the column number sets of the pilot sequences of the terminal device 2; the 11th to 30th columns in the configuration orthogonal matrix are the column number sets of the pilot sequences of the terminal device 3. At this time, the available pilot sequences of the terminal equipment 2 and the terminal equipment 3 are partially the same, and the available pilot sequences of the terminal equipment 1 and the terminal equipment 3 are also partially the same.

Optionally, the second parameter may include: the cell identity of the cell where the terminal device is located, the terminal identity of the terminal device, the time-frequency location parameter associated with the pilot, and the radio resource control (radio resource control, RRC) signaling configured by the network device. parameters, etc.

Wherein, the terminal device can determine the orthogonality according to one or more parameters of the cell identity of the cell where the terminal device is located, the terminal identity of the terminal device, the time-frequency location parameter associated with the pilot, or the RRC signaling parameter configured by the network device. The set of column numbers in the matrix that can be used to form pilot sequences for this terminal device.

In one embodiment, there may be a preset correspondence between the second parameter and the set of column numbers, and the terminal device may determine the set of column numbers corresponding to the second parameter configured by the network device according to the correspondence. In another embodiment, the second parameter can be used as an input parameter for determining a preset operation relationship of the column number set, and both the terminal device and the network device can calculate the column number according to the preset operation relationship and the second parameter gather. In yet another embodiment, the RRC signaling parameters may include at least two parameters among the starting column number, the ending column number, and the number of columns.

For example, the terminal device can determine the starting column number and the ending column number of the N sequences of pilot sequences that the terminal device can use according to the cell ID of the cell where the terminal device is located and the terminal ID of the terminal device, that is, to determine the terminal device's Pilot usage range.

Optionally, the network device may not limit the pilot frequency range of the terminal device, that is, the network device does not configure the second parameter for the terminal device, and the network device allocates pilot frequencies to the terminal within the range of N pilot frequencies. However, compared with the scheme of limiting the pilot frequency range of the terminal equipment, if the network equipment does not limit the pilot frequency use range of the terminal equipment, the probability of pilot frequency collision between the terminal equipment may increase.

S202, the network device sends the pilot configuration parameter to the terminal device; correspondingly, the terminal device receives the pilot configuration parameter sent by the network device.

After acquiring the pilot configuration parameters of the terminal device, the network device may send the pilot configuration parameters to the terminal device. For example, the pilot configuration parameter may be sent to the terminal device through radio resource control signaling. The network device may also send the pilot configuration parameters to the terminal device in other forms. For example, the network device may also broadcast the pilot configuration parameters to all terminal devices in the cell in the form of broadcasting, which is not limited in this embodiment.

Correspondingly, the terminal device receives the pilot configuration parameter sent by the network device. For example, the terminal device receives RRC signaling sent by the network device, and some fields in the RRC signaling indicate pilot configuration parameters. For another example, the terminal device receives a broadcast message of the cell where it is located, where the broadcast message includes information of pilot configuration parameters. The terminal device can obtain the pilot configuration parameters of the terminal device through the terminal identifier. Optionally, the terminal device may also acquire the pilot configuration parameter of the terminal device from the broadcast message in other ways, which is not limited in this embodiment.

Optionally, when the pilot configuration parameter includes the total number of pilots N, the total number of pilots N may be sent to the terminal device through RRC signaling, and the terminal device is configured to display the total number of pilots N.

Optionally, the total number N of pilots may not require additional explicit configuration, and the pilot configuration parameters received by the terminal device may not include the total number N of pilots. According to the protocol standard, the total number N of pilots and the length L of the pilot sequence have a preset corresponding relationship. That is to say, if the pilot configuration parameter includes the pilot sequence length L, the total number N of pilots can be determined.

Optionally, the network device may also directly determine the pilot sequence of the terminal device, and send the pilot sequence to the terminal device. Alternatively, the network device may determine the set of pilot sequences and send the set of pilot sequences to the terminal device. Wherein, determining the pilot sequence of the terminal device by the network device may include the following steps:

The network device determines the orthogonal matrix X according to the total number N of pilots and/or the type of the orthogonal matrix;

The network device determines the L×N matrix X′ from the orthogonal matrix X according to the length L of the pilot sequence;

The network device determines that one or more columns in the matrix X' constitute a pilot sequence set;

The network device sends one or more pilot sequences in the set of pilot sequences to one or more corresponding terminal devices; or, the network device sends the set of pilot sequences to the terminal device, so that the terminal device can download the pilot sequence from the set of pilot sequences. The pilot sequence of the terminal equipment is selected from the sequence set.

For the specific process of the network device determining the orthogonal matrix X, the matrix X', and determining the pilot sequence or the set of pilot sequences from the determination matrix X', reference may be made to the related description in step S203 below. For example, the base station selects M columns from the L×N matrix X′, and each column constitutes a pilot sequence. That is to say, the M pilot sequences constitute a pilot sequence set, and M is a positive integer less than or equal to N. The base station can allocate the M pilot sequences to multiple terminal devices in the cell, that is, the base station can directly send the pilot sequences corresponding to the terminal device to the terminal device. For another example, the base station may send the pilot sequence set to the terminal device, and then the terminal device selects the pilot sequence of the terminal device from the pilot sequence set by itself.

S203, the terminal device determines the pilot sequence of the terminal device from the orthogonal matrix.

The terminal equipment can configure the pilot frequency sequence of the terminal equipment according to the received pilot frequency configuration parameters. That is, the terminal device can determine the pilot sequence of the terminal device from the orthogonal matrix. Some or all of the elements in each column of the orthogonal matrix may constitute a pilot sequence or a pilot subsequence.

In an example, the terminal device determines the pilot sequence of the terminal device from the orthogonal matrix, which may include the following steps:

The terminal device determines an orthogonal matrix X with a dimension of N×N according to the total number of pilots N;

The terminal equipment selects L elements from one or more column elements of the orthogonal matrix X, and the L elements constitute the pilot sequence of the terminal equipment.

A schematic diagram of an orthogonal matrix X with a dimension of N×N determined by the terminal device is shown in FIG. 3 a . The orthogonal matrix X is a square matrix with N rows and N columns. Wherein, the orthogonal matrix X may be an orthogonal matrix specified in a protocol standard, that is, the terminal device has stored the orthogonal matrix X in advance.

Optionally, the orthogonal matrix X may also be configured by the network device, that is, the network device explicitly indicates the total number of pilots N and the type of the orthogonal matrix in the pilot configuration parameter, then the terminal device can determine that the dimension is N× Orthogonal matrix X of N.

According to the pilot sequence length L in the pilot configuration parameter, the terminal device may select L elements from one or more columns of the orthogonal matrix X, as shown in FIG. 4 . The method for the terminal device to select L elements from elements in one or more columns of the orthogonal matrix X may include, but is not limited to, random extraction, formula calculation, and the like.

Optionally, the pilot configuration parameters may also include the starting line number for configuring the first element in the pilot sequence, or the ending line number for configuring the last element in the pilot sequence, starting from the starting line number. Start to select L elements in one or more columns of the orthogonal matrix according to the preset rules.

It can be understood that the above-mentioned starting line number may not be used to configure the first element in the pilot sequence, but may be used to determine one of the L elements of the pilot sequence, and then select L elements from this element as a starting point. element, the L elements can be arranged in a preset order to obtain a pilot sequence. Similarly, the above-mentioned termination line number may not be used to configure the last element in the pilot sequence, but may be used to determine one of the L elements of the pilot sequence, and then select L elements with this element as the focus, and L The elements can be arranged in a preset order to obtain a pilot sequence.

For the convenience of description, the selection method of the terminal device will be described in detail below by taking L elements from a column of elements of the orthogonal matrix X as an example.

In an example, the terminal device may select L elements from a column of elements of the orthogonal matrix X by random extraction.

那么终端设备可以以

为参数，获取

的随机数。若

一次随机得到的随机数为1，那么终端设备可以从正交矩阵X的一列中选取第一个元素构成终端设备的导频序列。那么终端设备可以按照上述随机抽取的方式随机抽取L次，就可以选取L个元素构成终端设备的导频序列。 For example, suppose the cell ID of the cell where the terminal equipment is located is

Then the terminal device can

as a parameter, get

of random numbers. like

If the random number obtained at one time is 1, the terminal device can select the first element from a column of the orthogonal matrix X to form the pilot sequence of the terminal device. Then, the terminal device can randomly extract L times according to the above random extraction method, and then L elements can be selected to form the pilot sequence of the terminal device.

Optionally, when the terminal device selects a column of the orthogonal matrix X, it may also select a column by random extraction.

For example, the terminal device uses the terminal identifier as a parameter to obtain a random number of the terminal identifier. If the random number obtained by the terminal identification once is 5, the terminal equipment can randomly extract L times from the fifth column of the orthogonal matrix X, and the L elements extracted for the L times form the pilot sequence of the terminal equipment.

Optionally, the terminal device may first extract L rows of elements from the orthogonal matrix X in a random extraction manner to form an L×N matrix X′.

那么终端设备可以以

为参数，获取

的随机数。若

一次随机得到的随机数为1，那么终端设备可以选取正交矩阵X第一行。那么终端设备按照上述随机抽取的方式抽取L次，就可以得到L×N的矩阵X′。可选的，若某一次随机产生的随机数对应的行数已被选取，那么终端设备可以选择该随机数对应的行的下一行。 For example, suppose the cell ID of the cell where the terminal equipment is located is

Then the terminal device can

as a parameter, get

of random numbers. like

If the random number obtained at one time is 1, the terminal device can select the first row of the orthogonal matrix X. Then, the terminal device extracts L times according to the above random extraction method, and can obtain an L×N matrix X′. Optionally, if the row number corresponding to a random number generated at a certain time has been selected, the terminal device may select the next row of the row corresponding to the random number.

The terminal equipment may select any column from the L×N matrix X′ obtained by random extraction as the pilot sequence of the terminal equipment. Wherein, when the terminal device selects any column from the matrix X', it may also select a column by random extraction. For a specific example, please refer to the example description of selecting a column of the orthogonal matrix X for the terminal device in the foregoing embodiment, which may be selected by random extraction, which will not be repeated here.

In an example, the terminal device may obtain an element at a specified position from a column of elements of the orthogonal matrix X according to a specified formula.

那么终端设备可以采用以下指定的 公式计算获取指定位置的元素： For example, suppose the cell ID of the cell where the terminal equipment is located is

Then the terminal device can use the following specified formula to calculate and obtain the element at the specified position:

Among them, l=0,1,2,...L-1; p can be any prime number, so that when calculating according to formula (1), the number after the remainder is different each time. For example, according to formula (1), the terminal device can calculate L values corresponding to when l=0, 1, 2, . . . L-1, respectively. Correspondingly, the terminal device may correspondingly select L elements from one column of the orthogonal matrix X according to the L values obtained by the above calculation. The L elements constitute the pilot sequence of the terminal equipment.

Optionally, the terminal device may also first obtain L row elements from the orthogonal matrix X according to formula (1) to form an L×N matrix X′.

For example, according to formula (1), the terminal device can calculate L values corresponding to when l=0, 1, 2, . . . L-1, respectively. Correspondingly, the terminal device may correspondingly select L row elements from the orthogonal matrix X according to the L values obtained by the above calculation. The L row elements form an L×N matrix X′.

The terminal device can select any column from the L×N matrix X′ obtained according to formula (1) as the pilot sequence of the terminal device. Wherein, when the terminal device selects any column from the matrix X', it may also select a column from the matrix X' according to formula (1). For a specific example, please refer to the example description of selecting a column of the orthogonal matrix X for the terminal device in the foregoing embodiment, which may be an example description of selecting a column according to the specified formula (1), which will not be repeated here.

有关。 It can be seen that the above two ways for the terminal equipment to obtain the L elements are related to the cell identifier of the cell where the terminal equipment is located.

related.

无关。也就是说，不同小区中的终端设备，可以在正交矩阵X中选择相同数量和/或相同位置的元素。 In an example, when the terminal device obtains L elements from a column of elements of the orthogonal matrix X, the extraction method may also be the same as the cell identifier.

It doesn't matter. That is to say, terminal devices in different cells can select the same number and/or the same position of elements in the orthogonal matrix X.

For example, it is assumed that terminal equipment 1 is located within the signal coverage of cell 1, and terminal equipment 2 is located within the signal coverage of cell 2. Wherein, it is assumed that the orthogonal matrices X delivered by cell 1 and cell 2 are the same. Both terminal equipment 1 and terminal equipment 2 can determine the corresponding pilot sequence from the orthogonal matrix X. In a possible case, the terminal device 1 and the terminal device 2 may select the same number (eg L) and the same position of elements. At this time, the pilot sequences of terminal equipment 1 and terminal equipment 2 are the same.

Optionally, terminal devices in different cells may select the same L elements from the same orthogonal matrix X, and the terminal device may also scramble the selected L elements, and the L elements obtained after scrambling constitute the terminal. The pilot sequence of the device.

For example, it is assumed that terminal equipment 1 is located within the signal coverage of cell 1, and terminal equipment 2 is located within the signal coverage of cell 2. Wherein, the terminal device 1 and the terminal device 2 can select the same number (for example, L) and the same position of elements, that is, the L elements selected by the terminal device 1 and the terminal device 2 are exactly the same.

作为初始值的PN序列，也可以是由基站配置的Scramble ID决定的，本实施例不作限定。 In order to avoid pilot collision between terminal equipment 1 and terminal equipment 2, terminal equipment 1 may add the selected L elements to a sequence of length L modulo 2, so as to scramble the L elements selected by terminal equipment 1. Wherein, the sequence of length L may be generated by the cell 1 where the terminal device 1 is located.

The PN sequence as the initial value may also be determined by the Scramble ID configured by the base station, which is not limited in this embodiment.

作为初始值的PN序列，也可以是由基站配置的Scramble ID决定的，本实施例不作限定。 Similarly, the terminal device 2 may also add the selected L elements to a sequence of length L modulo 2, so as to scramble the L elements selected by the terminal device 2 . Wherein, the sequence of length L may be generated by the cell 2 where the terminal device 2 is located.

The PN sequence as the initial value may also be determined by the Scramble ID configured by the base station, which is not limited in this embodiment.

An embodiment of the present application provides a method for generating a sequence, and the method can be implemented by interaction between a network device and a terminal device. The network device acquires the pilot configuration parameters of the terminal device, and sends the pilot configuration parameters to the terminal device. The terminal device may determine, according to the orthogonal matrix indicated by the pilot configuration parameter, from the orthogonal matrix, some or all of the elements in each column of the orthogonal matrix constitute the pilot sequence of the terminal device. It can be seen that the method provided by the embodiment of the present application adopts an orthogonal matrix, which can make the number of pilot sequences tend to be infinite, which can meet the requirements of a large number of terminals in the mMTC scenario, and is conducive to improving the system capacity. Since the pilot sequence of the terminal device is selected from an orthogonal matrix, the interference between pilots sent by different terminal devices can be reduced, thereby reducing the processing complexity of the receiving end.

The following describes in detail the situation in which a terminal device may be allocated multiple pilot frequencies in the presence of frequency selective fading.

In one example, a terminal device may be allocated multiple pilots due to frequency selective fading. Wherein, each pilot frequency covers a segment of bandwidth. The interaction between the network device and the terminal device can include the following steps:

The network device determines the pilot configuration parameters of the terminal device;

The terminal equipment receives the pilot frequency configuration parameter sent by the network equipment, and the pilot frequency configuration parameter further includes the pilot frequency P of the terminal equipment;

The terminal device acquires P pilot sequences corresponding to the P frequency bands respectively.

Among them, due to the existence of frequency selective fading, the spectrum resources occupied by the terminal equipment can be divided into P frequency bands, each frequency band corresponds to a pilot sequence, and the length of each pilot sequence is a fixed value (for example, the pilot sequence includes L elements, that is, the length is L). Then, when the network device determines the pilot configuration parameter of the terminal device, the pilot configuration parameter may further include the number P of pilots of the terminal device. For example, if the number of pilots in the pilot configuration parameter is 4, it means that the terminal device divides the occupied spectrum resources into 4 frequency bands. In one embodiment, the pilot sequence corresponding to each frequency band may also be referred to as a pilot subsequence.

Wherein, for the p th frequency band (p=1, 2, . . . , P) in the P frequency bands, the terminal device may determine the pilot sequence corresponding to the p th frequency band from the orthogonal matrix X. The method for the terminal device to determine the pilot sequence corresponding to the p-th frequency band may include, but is not limited to, the random extraction method described in the above embodiment, the extraction method according to a specified formula, and the like.

无关。 For example, the terminal device may randomly select L elements from a column of elements of the orthogonal matrix X, and the L elements constitute the pilot sequence corresponding to the p-th frequency band. For another example, the terminal device may select L elements from a column of elements of the orthogonal matrix X according to a specified formula, and the L elements constitute a pilot sequence corresponding to the p-th frequency band. For another example, when the terminal device obtains L elements from a column of elements of the orthogonal matrix X, the extraction method may also be the same as the cell identifier.

It doesn't matter.

Similarly, for all the remaining frequency bands in the P frequency bands, the terminal device can determine from the orthogonal matrix X the pilot sequences corresponding to all the remaining frequency bands respectively. That is to say, when the terminal equipment divides the occupied pilot frequency resources into P frequency bands, the terminal equipment needs to select P times from the orthogonal matrix X, and select L elements each time, and finally obtain P corresponding to the P frequency bands. Pilot sequences, each pilot sequence includes L elements.

For example, it is assumed that the terminal equipment divides the occupied resources into 2 frequency bands. If the terminal equipment selects L elements from the orthogonal matrix X by random extraction, the terminal equipment randomly extracts L elements from a column of the orthogonal matrix X for the first time to form the pilot sequence 1 of the frequency band 1. The terminal equipment continues to randomly extract L elements from one column of the orthogonal matrix X to form the pilot sequence of frequency band 2. Wherein, when the terminal equipment randomly extracts, the orthogonal matrices used in extracting frequency band 1 and frequency band 2 are different. That is to say, the terminal device randomly extracts L elements from an orthogonal matrix to form the pilot sequence 1 of the frequency band 1. The terminal equipment randomly extracts L elements from another orthogonal matrix to form pilot sequence 1 of frequency band 1.

For another example, it is assumed that the terminal equipment divides the occupied resources into 2 frequency bands. If the terminal equipment selects L elements from the orthogonal matrix X according to the specified formula, then the terminal equipment extracts L elements from a column of the orthogonal matrix X according to the specified formula for the first time to form the pilot frequency of frequency band 1 sequence 1. The terminal equipment continues to extract L elements from one column of the orthogonal matrix X according to the specified formula to form the pilot sequence of frequency band 2. Wherein, when the terminal equipment randomly extracts, the orthogonal matrices used in extracting frequency band 1 and frequency band 2 may be the same or different.

Optionally, for the p-th frequency band, the terminal device may also first extract L row elements from the orthogonal matrix X to form an L×N matrix X′. The terminal equipment extracts another column from the matrix X' to form the pilot sequence of the p-th frequency band. Similarly, for all the remaining frequency bands in the P frequency bands, the terminal device can first extract L row elements from the orthogonal matrix X to form an L×N matrix X′, and then extract a column from the matrix X′ to form The pilot sequence of a certain frequency band. That is to say, the terminal device needs to extract P times from the orthogonal matrix X, and the L row elements extracted for the P times respectively form P L×N orthogonal matrices. The terminal equipment then extracts a column from each L×N orthogonal matrix to form a pilot sequence of any frequency band p in the P frequency bands.

It can be seen that in the case of considering frequency selective fading, for channels with severe frequency selective fading, terminal equipment can use separate pilot frequencies in different frequency bands, which is beneficial to enhance the ability to resist frequency selective fading.

The method for reducing the peak-to-average ratio of the pilot sequence will be described in detail below. In order to reduce the peak-to-average power ratio (PAPR) of the pilot sequence, so that the signal works in the linear region of the amplifier, the embodiment of the present application proposes to further perform precoding processing on the pilot sequence of the terminal device. That is, by performing precoding processing on the pilot sequence of the terminal device, the PAPR of the pilot sequence can be reduced.

In an example, the pilot sequence can be precoded by formula (2):

表示前文实施例所述的终端设备的导频序列，即正交矩阵X中的L个元素构成的导频序列；D表示L维的DFT预编码矩阵，

表示预编码处理后的终端设备的导频序列。通过公式(2)对终端设备的导频序列进行预编码处理，可以降低序列的PAPR。 in,

Represents the pilot sequence of the terminal equipment described in the previous embodiment, that is, the pilot sequence composed of L elements in the orthogonal matrix X; D represents the L-dimensional DFT precoding matrix,

Indicates the pilot sequence of the terminal equipment after precoding processing. By performing precoding processing on the pilot sequence of the terminal device by formula (2), the PAPR of the sequence can be reduced.

Wherein, the process of performing precoding processing on the pilot sequence of the terminal device according to formula (2) may be performed by the network device or by the terminal device.

需要注意的是，这里的子矩阵

可以包括一个或多个导频序列，即该子矩阵

中的一个导频序列为预编码处理后的终端设备的导频序列

导频序列

可以是子矩阵

中的一列元素或者多列元素。 For example, according to the description in the embodiment of FIG. 2 , the base station may determine an L×N matrix X′ from the orthogonal matrix X according to the length L of the pilot sequence. The matrix X' and the precoding matrix D are precoded according to formula (2), and the submatrix after precoding can be obtained

It should be noted that the submatrix here

can include one or more pilot sequences, i.e. the sub-matrix

One of the pilot sequences in the precoding process is the pilot sequence of the terminal equipment

pilot sequence

can be a submatrix

One or more columns of elements in .

后，基站可以通过信令将子矩阵

通知给终端设备，以使终端设备在子矩阵

中确定需要使用的导频序列

在本实施例中，终端设备在收到子矩阵

后，可以自主选择所所要使用的导频序列

也可以根据预设的 规则选择所要使用的导频序列

也可以根据基站的指示选择所要使用的导频序列

(例如，根据子矩阵

中基站所指示的列或者行的元素确定所要使用的导频序列

)。 In one embodiment, the base station obtains the sub-matrix after precoding processing

After that, the base station can send the sub-matrix by signaling

Notify the terminal device so that the terminal device is in the sub-matrix

Determine the pilot sequence to be used in

In this embodiment, the terminal device receives the sub-matrix

After that, you can autonomously select the pilot sequence to be used

The pilot sequence to be used can also be selected according to preset rules

The pilot sequence to be used can also be selected according to the instructions of the base station

(for example, according to the submatrix

The elements of the column or row indicated by the base station in the base station determine the pilot sequence to be used

).

通知给终端设备。在本实施例中，信令直接携带允许终端使用的导频序列，无需携带整个子矩阵

In another embodiment, the base station may also send one or more pilot sequences through signaling.

Notify the terminal device. In this embodiment, the signaling directly carries the pilot sequence that the terminal is allowed to use, without carrying the entire sub-matrix

所需的参数通知给终端设备，以终端设备根据该参数生成所述子矩阵

例如，根据图2实施例中的描述，终端设备可以根据导频配置参数，从正交矩阵X中确定子矩X′。在一实施方式中，根据公式(2)对导频序列

进行处理，得到最终所要使用的导频序列

在另一实施方式中，根据公式(2)对X′进行处理，即将公式(2)中的

替换成矩阵X′，得到子矩阵

该子矩阵

中的一列元素可以是一个导频序列

或者为一个导频序列

的一部分(例如，一个导频序列

由子矩阵

中多列元素构成)。终端设备根据该子矩阵

确定要使用的导频序列

在子矩阵

中确定导频序列

的方式可以是参考前文中从矩阵X或者矩阵X′中确定未进行预编码处理的导频序列的方式相同。 In yet another embodiment, the base station may generate a sub-matrix by signaling

The required parameter is notified to the terminal device, so that the terminal device generates the sub-matrix according to the parameter

For example, according to the description in the embodiment of FIG. 2 , the terminal device may determine the sub-moment X′ from the orthogonal matrix X according to the pilot configuration parameter. In one embodiment, the pilot sequence is

Process to get the final pilot sequence to be used

In another embodiment, X' is processed according to formula (2), that is, in formula (2)

Replace it with a matrix X' to get a submatrix

the submatrix

A column of elements in can be a pilot sequence

or a pilot sequence

part of (e.g. a pilot sequence

by submatrix

consists of multiple columns of elements). End devices according to this sub-matrix

Determine which pilot sequence to use

in the submatrix

determine the pilot sequence

The manner may be the same as the manner in which the pilot sequence without precoding processing is determined from the matrix X or the matrix X' in reference to the foregoing.

所需的参数指示给终端设备，以使终端设备确定待进行预编码处理的序列

然后根据公式(2)对序列

进行处理得到导频序列

例如，根据图2实施例中的描述，终端设备可以根据导频配置参数，根据正交矩阵X确定序列

然后根据公式(2)对序列

进行处理得到导频序列

表示前文实施例所获得的未经预编码处理过的导频序列。 In another embodiment, the base station can generate the

The required parameters are indicated to the terminal device so that the terminal device can determine the sequence to be subjected to precoding processing

Then according to formula (2), the sequence

Process to get the pilot sequence

For example, according to the description in the embodiment of FIG. 2, the terminal device may determine the sequence according to the orthogonal matrix X according to the pilot configuration parameters

Then according to formula (2), the sequence

Process to get the pilot sequence

Indicates the unprecoded pilot sequence obtained in the foregoing embodiment.

In the case of frequency selective fading, the terminal device or the base station can perform precoding processing on the pilot sequences corresponding to each frequency band obtained in the preceding embodiment without precoding processing according to formula (2), respectively, to obtain the corresponding frequency bands corresponding to each frequency band. The final pilot sequence to be used.

If scrambling is used in the process of generating the pilot sequence, formula (2) can be used to perform precoding processing and then scrambling processing, or scrambling processing can be performed first and then formula (2) can be used to perform precoding processing. This embodiment is not limited.

The following describes in detail how the sequence generation method provided by the embodiment of the present application simplifies the operation of the receiving end and improves the performance of the receiving end.

The terminal device can determine the pilot sequence of the terminal device from the orthogonal matrix X. Correspondingly, the network device can also use the same method as the terminal device to obtain the orthogonal matrix X, and obtain the L elements selected by the terminal device. Corresponding positive sequence. The position parameter in the intersection matrix X. Among them, the position parameter indicates which row and which column in the orthogonal matrix X an element is located. For example, an element selected by the terminal device is located in the second row and second column of the orthogonal matrix, that is, the position parameter of the element is the second row and second column. The base station can obtain an L×N orthogonal matrix X′ according to the position parameter of each element.

When the terminal device sends the pilot sequence of the terminal device to the network device, the network device can sequentially use the 1st to Nth columns of the L×N orthogonal matrix X′ to correlate the received pilot sequences to obtain N related value. Wherein if a value r _i of the correlation value exceeds the preset threshold, it can be determined correlation value r _i of the pilot sequence to the row pilot sequence sent by the terminal, the user to complete the detection process.

Please refer to FIG. 5. FIG. 5 is a schematic diagram of performance when a network device provides an orthogonal matrix and performs user detection using an embodiment of the present application. Wherein, the indicator of missed detection probability can be used to judge the performance change of the network device when performing user detection. It can be seen that as the number of antennas of the network device increases, the probability of missed detection of the network device gradually decreases. Among them, when the network equipment uses the Fourier transform matrix or the Hadamard matrix for user detection, the probability of missed detection is relatively close, and the probability of missed detection of both is relatively low. It can be seen that the embodiment of the present application proposes that the pilot sequence is selected from an orthogonal matrix, which can reduce the interference between pilots sent by different terminal devices, thereby reducing the processing complexity of the receiving end, and at the same time achieving a lower probability of missed detection.

The related devices of the embodiments of the present application will be described in detail below with reference to FIG. 6 to FIG. 9 .

An embodiment of the present application provides a terminal device. As shown in FIG. 6 , the terminal device is configured to implement the method executed by the terminal device in the foregoing method embodiments, and specifically includes:

Transceiver unit 601, configured to receive a pilot configuration parameter sent by a network device, where the pilot configuration parameter includes a first parameter used to configure an orthogonal matrix used by a terminal device, and some or all of the elements in each column of the orthogonal matrix constitute a pilot sequence or pilot subsequence;

The processing unit 602 is configured to determine the pilot sequence of the terminal equipment from the orthogonal matrix.

In one implementation, the first parameter includes the total number N of pilots and/or the type of orthogonal matrix.

In an implementation manner, the pilot configuration parameter further includes a pilot sequence length L and/or a second parameter, where the second parameter is used to configure a set of column numbers in the orthogonal matrix that can be used to form the pilot sequence of the terminal device .

In an implementation manner, the processing unit 602 is configured to determine the pilot sequence of the terminal device from the orthogonal matrix, and is specifically configured to:

According to the total number of pilot frequencies N, determine an orthogonal matrix X with a dimension of N×N;

L elements are selected from one or more column elements of the orthogonal matrix X, and the L elements constitute the pilot sequence of the terminal device.

In an implementation manner, the processing unit 602 is configured to determine an orthogonal matrix X with a dimension of N×N according to the total number N of pilots, and is specifically configured to:

According to the total number of pilots N and the matrix type, an orthogonal matrix X of the matrix type with dimension N×N is determined.

In an implementation manner, the processing unit 602 selects L elements from the elements of the multiple columns of the N×N orthogonal matrix X, and the number and/or position of the selected elements in each column are the same.

In an implementation manner, the processing unit 602 is configured to select L elements from one or more column elements of the orthogonal matrix X, specifically for:

L elements are randomly selected from one or more columns of the orthogonal matrix X; or, L elements are selected from one or more columns of the orthogonal matrix X according to the cell identifier of the cell where the terminal device is located.

In one implementation, the processing unit 602 is further configured to:

The L elements are scrambled, and the L elements obtained after scrambling constitute the pilot sequence of the terminal device.

In one implementation, the processing unit 602 is further configured to:

The pilot sequence length L is determined based on the configured time-frequency resources for transmitting pilots.

In one implementation, the processing unit 602 is further configured to:

The L elements are subjected to precoding processing, and the L elements obtained after the precoding processing constitute the pilot sequence of the terminal device. In an optional implementation manner, a DFT matrix may be used to perform precoding processing on the above-mentioned L elements.

In an implementation manner, the processing unit 602 is configured to determine the pilot sequence of the terminal device from the orthogonal matrix, and is specifically configured to:

According to the total number of pilot frequencies N, determine an orthogonal matrix X with a dimension of N×N;

According to the length L of the pilot sequence, determine the matrix X′ of L×N from the orthogonal matrix X;

The pilot sequence of the terminal device is determined from one or more columns in the matrix X'.

In an implementation manner, the processing unit 602 is configured to determine an L×N matrix X′ from the orthogonal matrix X according to the length L of the pilot sequence, and is specifically used for:

According to the length L of the pilot sequence, L rows are randomly selected from the orthogonal matrix X to determine an L×N matrix X′.

In an implementation manner, the processing unit 602 is configured to determine an L×N matrix X′ from the orthogonal matrix X according to the length L of the pilot sequence, and is specifically used for:

An L×N matrix X′ is determined according to the length L of the pilot sequence and the cell identifier of the cell where the terminal equipment is located.

In one implementation, the matrix X' of different cells is the same.

In an implementation manner, the related functions implemented by each unit in FIG. 6 may be implemented by a transceiver and a processor. Referring to FIG. 7 , FIG. 7 is a schematic structural diagram of a terminal device provided by an embodiment of the present application. The terminal device may be a device (eg, a chip) having the function of performing the sequence generation described in the embodiment of the present application. The terminal device may include a transceiver 701 , at least one processor 702 and a memory 703 . Wherein, the transceiver 701, the processor 702 and the memory 703 may be connected to each other through one or more communication buses, and may also be connected to each other in other ways.

The transceiver 701 may be used for sending information or receiving information. It can be understood that the transceiver 701 is a general term and may include a receiver and a transmitter. For example, the receiver is used for pilot configuration parameters sent by the network device.

The processor 702 may be used to process information of the terminal device. For example, the processor 702 may call the program code stored in the memory 703 to realize the determination of the pilot sequence of the terminal device from the orthogonal matrix. The processor 702 may include one or more processors, for example, the processor 702 may be one or more central processing units (CPUs), network processors (NPs), hardware chips or any combination thereof . In the case where the processor 702 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

Among them, the memory 703 is used for storing program codes and the like. The memory 703 may include a volatile memory (volatile memory), such as random access memory (RAM); the memory 703 may also include a non-volatile memory (non-volatile memory), such as a read-only memory (read- only memory, ROM), flash memory (flash memory), hard disk drive (HDD) or solid-state drive (solid-state drive, SSD); the memory 703 may also include a combination of the above-mentioned types of memory.

The above-mentioned processor 702 and memory 703 may be coupled through an interface, or may be integrated together, which is not limited in this embodiment.

The foregoing transceiver 701 and processor 702 may be used to implement the sequence generation method in this embodiment of the present application, where the specific implementation is as follows:

The transceiver 701 is configured to receive a pilot configuration parameter sent by a network device, where the pilot configuration parameter includes a first parameter used to configure an orthogonal matrix used by a terminal device, and some or all of the elements in each column of the orthogonal matrix constitute a pilot sequence or pilot subsequence;

The processor 702 is configured to determine the pilot sequence of the terminal equipment from the orthogonal matrix.

In one implementation, the first parameter includes the total number N of pilots and/or the type of orthogonal matrix.

In an implementation manner, the pilot configuration parameter further includes a pilot sequence length L and/or a second parameter, where the second parameter is used to configure a set of column numbers in the orthogonal matrix that can be used to form the pilot sequence of the terminal device .

In an implementation manner, the processor 702 is configured to determine the pilot sequence of the terminal device from the orthogonal matrix, and is specifically configured to:

According to the total number of pilot frequencies N, determine an orthogonal matrix X with a dimension of N×N;

L elements are selected from one or more column elements of the orthogonal matrix X, and the L elements constitute the pilot sequence of the terminal device.

In an implementation manner, the processor 702 is configured to determine an orthogonal matrix X with a dimension of N×N according to the total number N of pilots, and is specifically configured to:

According to the total number of pilots N and the matrix type, an orthogonal matrix X of the matrix type with dimension N×N is determined.

In one implementation, the processor 702 selects L elements from the elements of the multiple columns of the N×N orthogonal matrix X, and the number and/or position of the selected elements in each column is the same.

In an implementation manner, the processor 702 is configured to select L elements from one or more column elements of the N×N orthogonal matrix X, and is specifically used for:

L elements are randomly selected from one or more columns of the orthogonal matrix X; or, L elements are selected from one or more columns of the orthogonal matrix X according to the cell identifier of the cell where the terminal device is located.

In one implementation, the processor 702 is also used to:

The L elements are scrambled, and the L elements obtained after scrambling constitute the pilot sequence of the terminal equipment.

In one implementation, the processor 702 is also used to:

The pilot sequence length L is determined based on the configured time-frequency resources for transmitting pilots.

In one implementation, the processor 702 is also used to:

The L elements are subjected to precoding processing, and the L elements obtained after the precoding processing constitute the pilot sequence of the terminal device. In an optional implementation manner, a DFT matrix may be used to perform precoding processing on the above-mentioned L elements.

In an implementation manner, the processor 702 is configured to determine the pilot sequence of the terminal device from the orthogonal matrix, and is specifically configured to:

According to the total number of pilot frequencies N, determine an orthogonal matrix X with a dimension of N×N;

According to the length L of the pilot sequence, determine the matrix X′ of L×N from the orthogonal matrix X;

The pilot sequence of the terminal device is determined from one or more columns in the matrix X'.

In an implementation manner, the processor 702 is configured to determine an L×N matrix X′ from the orthogonal matrix X according to the length L of the pilot sequence, and is specifically configured to:

According to the length L of the pilot sequence, L rows are randomly selected from the orthogonal matrix X to determine an L×N matrix X′.

In an implementation manner, the processor 702 is configured to determine an L×N matrix X′ from the orthogonal matrix X according to the length L of the pilot sequence, and is specifically configured to:

An L×N matrix X′ is determined according to the length L of the pilot sequence and the cell identifier of the cell where the terminal equipment is located.

In one implementation, the matrix X' of different cells is the same.

An embodiment of the present application provides a network device. As shown in FIG. 8 , the communication device is configured to execute the method executed by the network device in the foregoing method embodiments, and specifically includes:

The processing unit 801 is configured to acquire pilot configuration parameters of the terminal equipment, where the pilot configuration parameters include a first parameter used to configure an orthogonal matrix used by the terminal equipment, and some or all of the elements in each column of the orthogonal matrix constitute a pilot. frequency sequence or pilot subsequence;

Transceiver unit 802, configured to send pilot configuration parameters to terminal equipment.

In one implementation, the first parameter includes the total number N of pilots and/or the type of orthogonal matrix.

In an implementation manner, the pilot configuration parameter further includes a pilot sequence length L and/or a second parameter, where the second parameter is used to configure a column in the orthogonal matrix that can be used to form a pilot sequence of the terminal device number collection.

In an implementation manner, there is a preset corresponding relationship between the total number N of pilots and the length L of the pilot sequence.

In an implementation manner, the orthogonal matrix type is preset, or there is a preset corresponding relationship between the orthogonal matrix type and the total number N of pilots and/or the length L of the pilot sequence.

In one implementation, the second parameter includes one or more of the following:

The cell identifier of the cell where the terminal equipment is located;

Terminal identification of the terminal equipment;

The time-frequency location parameter associated with the pilot;

Radio resource control RRC signaling parameters configured by the network device.

In one implementation, the processing unit 801 is further configured to:

Determine the orthogonal matrix X according to the total number N of pilots and/or the type of the orthogonal matrix;

According to the length L of the pilot sequence, determine the matrix X′ of L×N from the orthogonal matrix X;

Determine that one or more columns in the matrix X' constitute a set of pilot sequences;

The transceiver unit 802 is further configured to send one or more pilot sequences in the set of pilot sequences to one or more corresponding terminal devices; or, send the set of pilot sequences to the terminal device, so that the The pilot sequence of the terminal equipment is selected from the pilot sequence set.

In one possible design, the processing unit 801 is also used to:

Determine the orthogonal matrix X according to the total number N of pilots and/or the type of the orthogonal matrix;

According to the length L of the pilot sequence, determine the matrix X′ of L×N from the orthogonal matrix X;

According to the matrix X' and the precoding matrix, an L×N matrix X″ after the precoding process is determined.

Alternatively, the precoding matrix may be a DFT matrix.

In an implementation manner, the related functions implemented by each unit in FIG. 8 may be implemented by a transceiver and a processor. Referring to FIG. 9, FIG. 9 is a schematic structural diagram of a network device provided by an embodiment of the present application. The network device 900 may include a transceiver 901 , at least one processor 902 and a memory 903 . Wherein, the transceiver 901, the processor 902 and the memory 903 may be connected to each other through one or more communication buses, and may also be connected to each other in other ways.

The transceiver 901 may be used for sending information or receiving information. It can be understood that the transceiver 901 is a general term and may include a receiver and a transmitter. For example, the transmitter is used to send pilot configuration parameters to the terminal equipment.

Wherein, the processor 902 may be used to process the information of the network device. For example, the processor 902 can call the program code stored in the memory 903 to obtain the pilot configuration parameters of the terminal device. The processor 902 may include one or more processors, for example, the processor 902 may be one or more central processing units (CPUs), network processors (NPs), hardware chips or any combination thereof . In the case where the processor 902 is a CPU, the CPU may be a single-core CPU or a multi-core CPU.

Among them, the memory 903 is used for storing program codes and the like. The memory 903 may include a volatile memory (volatile memory), such as random access memory (RAM); the memory 903 may also include a non-volatile memory (non-volatile memory), such as a read-only memory (read- only memory, ROM), flash memory (flash memory), hard disk drive (HDD) or solid-state drive (solid-state drive, SSD); the memory 903 may also include a combination of the above-mentioned types of memory.

The above-mentioned processor 902 and memory 903 may be coupled through an interface, or may be integrated together, which is not limited in this embodiment.

The foregoing transceiver 901 and processor 902 may be used to implement the sequence generation method in this embodiment of the present application, where the specific implementation is as follows:

The processor 902 is configured to acquire pilot configuration parameters of the terminal device, where the pilot configuration parameters include a first parameter used to configure an orthogonal matrix used by the terminal device, and some or all of the elements in each column of the orthogonal matrix constitute a pilot. frequency sequence or pilot subsequence;

The transceiver 901 is configured to send pilot configuration parameters to the terminal equipment.

In one implementation, the first parameter includes the total number N of pilots and/or the type of orthogonal matrix.

In an implementation manner, the pilot configuration parameter further includes a pilot sequence length L and/or a second parameter, where the second parameter is used to configure a set of column numbers in the orthogonal matrix that can be used to form the pilot sequence of the terminal device .

In an implementation manner, there is a preset corresponding relationship between the total number N of pilots and the length L of the pilot sequence.

In an implementation manner, the orthogonal matrix type is preset, or there is a preset corresponding relationship between the orthogonal matrix type and the total number N of pilots and/or the length L of the pilot sequence.

In one implementation, the second parameter includes one or more of the following:

The cell identifier of the cell where the terminal equipment is located;

Terminal identification of the terminal equipment;

The time-frequency location parameter associated with the pilot;

Radio resource control RRC signaling parameters configured by the network device.

In one implementation, the processor 902 is also used to:

Determine the orthogonal matrix X according to the total number N of pilots and/or the type of the orthogonal matrix;

According to the length L of the pilot sequence, determine the matrix X′ of L×N from the orthogonal matrix X;

Determine that one or more columns in the matrix X' constitute a set of pilot sequences;

The transceiver 901 is further configured to send one or more pilot sequences in the set of pilot sequences to one or more corresponding terminal devices; or, to send the set of pilot sequences to the terminal device, so that the The pilot sequence of the terminal equipment is selected from the pilot sequence set.

In one possible design, processor 902 is also used to:

Determine the orthogonal matrix X according to the total number N of pilots and/or the type of the orthogonal matrix;

According to the length L of the pilot sequence, determine the matrix X′ of L×N from the orthogonal matrix X;

According to the matrix X' and the precoding matrix, an L×N matrix X″ after the precoding process is determined.

Alternatively, the precoding matrix may be a DFT matrix.

An embodiment of the present application provides a communication system, where the communication system includes the terminal device and the network device described in the foregoing embodiments.

The embodiment of the present application provides a computer-readable storage medium, where the computer-readable storage medium stores a program or an instruction, and when the program or the instruction runs on a computer, the computer executes the sequence generation method in the embodiment of the present application.

An embodiment of the present application provides a chip or a chip system, the chip or chip system includes at least one processor and an interface, the interface and the at least one processor are interconnected by a line, and the at least one processor is used to run a computer program or instruction to perform the present application Sequence generation method in the Examples.

Wherein, the interface in the chip may be an input/output interface, a pin or a circuit, or the like.

The chip system in the above aspects may be a system on chip (system on chip, SOC), or a baseband chip, etc., where the baseband chip may include a processor, a channel encoder, a digital signal processor, a modem, an interface module, and the like.

In an implementation manner, the chip or chip system described above in this application further includes at least one memory, where instructions are stored in the at least one memory. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or a storage unit of the chip (eg, a read-only memory, a random access memory, etc.).

In the above-mentioned embodiments, it may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. A computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. Computer instructions may be stored on or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, computer, server, or data center over a wire (e.g. Coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (such as infrared, wireless, microwave, etc.) means to transmit to another website site, computer, server or data center. A computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, a data center, or the like that includes an integration of one or more available media. The available media may be magnetic media (eg, floppy disks, hard disks, magnetic tapes), optical media (eg, high-density digital video discs (DVD)), or semiconductor media (eg, solid state disks, SSD)) etc.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. Interchangeability, the above description has generally described the components and steps of each example in terms of function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (36)

A method for generating sequences, comprising: The terminal device receives a pilot configuration parameter sent by the network device, where the pilot configuration parameter includes a first parameter used to configure an orthogonal matrix used by the terminal device, and some or all of the elements in each column of the orthogonal matrix constitute a pilot sequence or pilot subsequence; The terminal device determines the pilot sequence of the terminal device from the orthogonal matrix. The method according to claim 1, wherein the first parameter comprises the total number N of pilots and/or the type of orthogonal matrix. The method according to claim 1 or 2, wherein the pilot configuration parameter further comprises a pilot sequence length L and/or a second parameter, wherein the second parameter is used to configure the orthogonal matrix The set of column numbers used to constitute the pilot sequence of the terminal equipment in the . The method according to claim 2 or 3, wherein the terminal device determines the pilot sequence of the terminal device from the orthogonal matrix, comprising: The terminal device determines, according to the total number N of pilot frequencies, an orthogonal matrix X with a dimension of N×N; The terminal device selects L elements from one or more column elements of the orthogonal matrix X, where the L elements constitute a pilot sequence of the terminal device. The method according to claim 4, wherein, according to the total number N of pilots, the terminal device determines an orthogonal matrix X with a dimension of N×N, comprising: The terminal device determines, according to the total number of pilots N and the matrix type, an orthogonal matrix X of the matrix type with a dimension of N×N. The method according to claim 4, wherein the terminal device selects the L elements from the elements of the multiple columns of the N×N orthogonal matrix X, and the number of selected elements in each column and/ or the same location. The method according to claim 4, wherein the terminal device selects L elements from one or more column elements of an N×N orthogonal matrix X, including: The terminal device selects L elements by random extraction from one or more column elements of the orthogonal matrix X; or, The terminal device selects L elements from one or more column elements of the orthogonal matrix X according to the cell identifier of the cell where the terminal device is located. The method according to any one of claims 4 to 7, wherein the L elements constitute a pilot sequence of the terminal device, comprising: The terminal equipment scrambles the L elements, and the L elements obtained after scrambling constitute a pilot sequence of the terminal equipment. The method according to claim 1, wherein the method further comprises: The terminal device determines the pilot sequence length L based on the configured time-frequency resources for sending pilots. A terminal device, characterized in that it includes: a transceiver unit, configured to receive a pilot configuration parameter sent by a network device, where the pilot configuration parameter includes a first parameter used to configure an orthogonal matrix used by the terminal device, and the part in each column of the orthogonal matrix Or all elements form a pilot sequence or pilot subsequence; and a processing unit, configured to determine the pilot sequence of the terminal device from the orthogonal matrix. The device according to claim 10, wherein the first parameter comprises the total number N of pilots and/or the type of orthogonal matrix. The device according to claim 10 or 11, wherein the pilot configuration parameter further comprises a pilot sequence length L and/or a second parameter, wherein the second parameter is used to configure the orthogonal matrix The set of column numbers used to constitute the pilot sequence of the terminal equipment in the . The device according to claim 11 or 12, wherein the processing unit is configured to determine the pilot sequence of the terminal device from the orthogonal matrix, and is specifically configured to: According to the total number N of pilot frequencies, determine an orthogonal matrix X with a dimension of N×N; L elements are selected from one or more column elements of the orthogonal matrix X, and the L elements constitute the pilot sequence of the terminal device. The device according to claim 13, wherein the processing unit is configured to determine an orthogonal matrix X with a dimension of N×N according to the total number N of pilots, and is specifically configured to: According to the total number N of pilots and the matrix type, an orthogonal matrix X of the matrix type with dimension N×N is determined. The device according to claim 13, wherein the processing unit selects the L elements from the elements of multiple columns of the N×N orthogonal matrix X, and the number of selected elements in each column and/ or the same location. The device according to claim 13, wherein the processing unit is configured to select L elements from one or more column elements of the orthogonal matrix X, and is specifically used for: L elements are randomly selected from one or more columns of the orthogonal matrix X; or According to the cell identifier of the cell where the terminal device is located, L elements are selected from the elements in one or more columns of the orthogonal matrix X. The device according to any one of claims 13 to 16, wherein the processing unit is further configured to: The L elements are scrambled, and the L elements obtained after scrambling constitute a pilot sequence of the terminal device. The device according to claim 10, wherein the processing unit is further configured to: The pilot sequence length L is determined based on the configured time-frequency resources for sending pilots. A terminal device, comprising: a memory and a processor; the memory for storing computer instructions; The processor for executing the computer instructions such that the method of any one of claims 1 to 9 is performed. A computer-readable storage medium, characterized by comprising programs or computer instructions, when the program or computer instructions are executed on a computer, the method according to any one of claims 1 to 9 is performed. A method for generating sequences, comprising: The network device acquires pilot configuration parameters of the terminal device, where the pilot configuration parameters include a first parameter for configuring an orthogonal matrix used by the terminal device; wherein part or all of each column of the orthogonal matrix The elements constitute a pilot sequence or pilot subsequence; The network device sends the pilot configuration parameter to the terminal device. The method of claim 21, wherein the first parameter comprises the total number of pilots N and/or the type of orthogonal matrix. The method according to claim 21, wherein the pilot configuration parameter further comprises a pilot sequence length L and/or a second parameter, wherein the second parameter is used to configure the orthogonal matrix and can be used to form a The set of column numbers of the pilot sequence of the terminal equipment. The method according to claim 22 or 23, wherein a preset corresponding relationship exists between the total number N of pilots and the length L of the pilot sequence. The method according to claim 22 or 23, wherein the orthogonal matrix type is preset; or, the orthogonal matrix type is related to the total number N of pilots and/or the length of the pilot sequence L has a preset corresponding relationship. The method of claim 23, wherein the second parameter comprises one or more of the following: The cell identifier of the cell where the terminal equipment is located; the terminal identifier of the terminal device; the time-frequency location parameter associated with the pilot; or, The radio resource control RRC signaling parameters configured by the network device. The method according to any one of claims 21 to 26, wherein the method further comprises: The network device determines an orthogonal matrix X according to the total number N of pilots and/or the type of the orthogonal matrix; The network device determines an L×N matrix X′ from the orthogonal matrix X according to the pilot sequence length L; The network device determines that one or more columns in the matrix X' constitute a pilot sequence set; The network device sends one or more pilot sequences in the set of pilot sequences to one or more corresponding terminal devices; or, the network device sends the set of pilot sequences to the terminal device, so that The terminal device selects the pilot sequence of the terminal device from the set of pilot sequences. The method according to any one of claims 21 to 26, wherein the method further comprises: The network device determines an orthogonal matrix X according to the total number N of pilots and/or the type of the orthogonal matrix; The network device determines an L×N matrix X′ from the orthogonal matrix X according to the pilot sequence length L; The network device determines an L×N matrix X″ after precoding processing according to the matrix X′ and the precoding matrix. A network device, characterized in that it includes: a processing unit, configured to obtain a pilot configuration parameter of a terminal device, where the pilot configuration parameter includes a first parameter used to configure an orthogonal matrix used by the terminal device, a part of each column of the orthogonal matrix or All elements form a pilot sequence or pilot subsequence; A transceiver unit, configured to send pilot configuration parameters to the terminal device. The device according to claim 29, wherein the first parameter comprises a total number of pilots N and/or an orthogonal matrix type. The device according to claim 29, wherein the pilot configuration parameter further comprises a pilot sequence length L and/or a second parameter, wherein the second parameter is used to configure the orthogonal matrix and can be used to form a The set of column numbers of the pilot sequence of the terminal equipment. The device according to claim 30 or 31, wherein there is a preset correspondence between the total number N of pilots and the length L of the pilot sequence. The device according to claim 30 or 31, wherein the orthogonal matrix type is preset, or the orthogonal matrix type is related to the total number N of pilots and/or the length of the pilot sequence L has a preset corresponding relationship. The device according to claim 31, wherein the second parameter comprises one or more of the following: The cell identifier of the cell where the terminal equipment is located; the terminal identifier of the terminal device; the time-frequency location parameter associated with the pilot; or, The radio resource control RRC signaling parameters configured by the network device. A network device, comprising: a memory and a processor; the memory for storing computer instructions; The processor for executing the computer instructions such that the method of any one of claims 21 to 28 is performed. A computer-readable storage medium, characterized by comprising a program or computer instructions, when the program or computer instructions are executed on a computer, the method according to any one of claims 21 to 28 is performed.

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