WO2017215020A1 - Method and device for testing large-scale mimo system base station - Google Patents

Abstract

The present application discloses a method and device for testing large-scale MIMO system base station. The method comprises: when a terminal communicates with a base station to be tested, then processing, on the basis of a preset processing method, a transmission signal between the terminal and the base station to be tested, wherein the preset processing method comprises: fading processing, time delay processing, and wave surface control processing; and obtaining, by referring to the processed transmission signal, a testing result of the base station to be tested. The application addresses a technical issue of relatively low efficiency of base station testing in the prior art.

Description

Test method and device for base station of massive MIMO system

The present application claims priority to Chinese Patent Application No. 201610417735.3, entitled "A Test Method and Apparatus for Base Stations of Massive MIMO Systems", filed on June 14, 2016, the entire contents of which is incorporated herein by reference. This is incorporated herein by reference.

Technical field

The present application relates to the field of communications, and in particular to a test method and apparatus for a base station of a massive MIMO system.

Background technique

MIMO (Multiple-Input Multiple-Output) technology refers to the use of multiple transmit and receive antennas at the transmitting end and the receiving end respectively, so that signals are transmitted and received through multiple antennas at the transmitting end and the receiving end, thereby improving Communication quality. How to test the base station using MIMO technology to determine the performance of the base station is of great significance to ensure the communication quality of the base station.

At present, in testing base stations and terminal equipment using MIMO technology, multi-probe method, external field test method and conduction test method are generally used, but the test cost using the multi-probe method increases linearly with the number of antennas of large-scale MIMO technology. The system construction and maintenance is extremely complicated, and the hardware implementation is extremely difficult. It is basically limited to the test plan for the terminal device; the field test method has poor repeatability, the network hardware requirements are too high, and the test fails. Problem tracking and backtracking; the conduction test rule is limited by the large number of ports or conductive cables that do not have conductive cable connections for large-scale MIMO systems, and are not easily conductive. In summary, the base station test in the prior art has technical problems of high test cost, high test complexity, low test accuracy, and low test efficiency.

In response to the above problems, no effective solution has been proposed yet.

Summary of the invention

The embodiments of the present application provide a testing method and apparatus for a base station of a massive MIMO system, so as to at least solve the technical problem that the base station in the prior art has low testing efficiency.

According to an aspect of the embodiments of the present application, a test method for a base station of a massive MIMO system is provided, the method includes: when the terminal communicates with the base station to be tested, the terminal and the standby according to a preset processing manner Transmitting a transmission signal between the base stations, where the preset processing manner includes at least: fading processing, delay And the wavefront control process; obtaining the test result of the base station to be tested according to the processed transmission signal.

Preferably, the processing, by the preset processing mode, the transmission signal between the terminal and the base station to be tested includes: acquiring the transmission signal on each multipath, wherein the multipath is in the terminal And generating, by the communication with the base station to be tested; acquiring a first signal parameter of the transmission signal, and processing the first signal parameter to obtain the processed transmission signal, where the first The signal parameter is a parameter carried before the transmission signal is processed by the preset processing mode, and the first signal parameter includes at least: a transmission time, a spatial phase, and an angular phase.

所述K为所述多径的个数，所述u_k(t)为所述传输信号在第k个多径上的无线信道衰落，所述δ[τ-τ_k(t)]为所述传输信号的时延扩展，所述τ_k(t)为所述时延扩展在所述第k个多径上随时间变化的相位特征，所述δ(θ-θ_k)为所述传输信号的空间扩展，所述θ_k为所述空间扩展在所述第k个多径上的所述相位特征，所述t为所述传输信号的所述传输时间，所述θ为所述传输信号的所述空间相位，所述τ为所述传输信号的所述角度相位，以及所述h(t,τ,θ)为所述处理后的所述传输信号。Preferably, the processing the first signal parameter to obtain the processed transmission signal comprises: processing the first signal parameter according to a preset formula, wherein the preset formula is

The K is the number of the multipaths, and the u _k (t) is a radio channel fading of the transmission signal on the kth multipath, and the δ[τ-τ _k (t)] is a delay spread of the transmission signal, wherein the τ _k (t) is a phase characteristic of the delay spread over time on the kth multipath, and the δ(θ-θ _k ) is the transmission Spatial expansion of the signal, the θ _k being the phase characteristic of the spatial extension on the kth multipath, the t being the transmission time of the transmission signal, and the θ being the transmission The spatial phase of the signal, the τ being the angular phase of the transmission signal, and the h(t, τ, θ) being the processed transmission signal.

Preferably, the obtaining the test result of the base station to be tested according to the processed transmission signal comprises: acquiring a second signal parameter of the processed transmission signal, where the second signal parameter is a parameter carried by the transmission signal after being processed by the preset processing manner, where the second signal parameter includes at least one of the following: a signal strength, a signal to noise ratio, a signal transmission rate, and a bit error rate; The test result corresponding to the second signal parameter.

Preferably, when the terminal communicates with the base station to be tested, the method further comprises: filtering the electromagnetic waves affecting the transmission signal by using an absorbing darkroom.

According to another aspect of the embodiments of the present application, a test apparatus for a base station of a massive MIMO system is provided, the apparatus includes: a processing unit, configured to: when the terminal communicates with the base station to be tested, according to a preset processing manner Processing, by the terminal, the transmission signal between the terminal and the base station to be tested, where the preset processing manner includes at least: fading processing, delay processing, and wavefront control processing; and an acquiring unit, configured to perform, according to the processed The transmission signal obtains a test result of the base station to be tested.

Preferably, the processing unit includes: a first acquiring subunit, configured to acquire the transmission signal on each multipath, where the multipath is generated when the terminal communicates with the base station to be tested; a subunit, configured to acquire a first signal parameter of the transmission signal, and process the first signal parameter to obtain the processed transmission signal, where the first signal parameter is the transmission The parameter is not carried by the preset processing mode, and the first signal parameter includes at least: a transmission time, a spatial phase, and an angular phase.

所述K为所述多径的个数，所述u_k(t)为所述传输信号在第k个多径上的无线信道衰落，所述δ[τ-τ_k(t)]为所述传输信号的时延扩展，所述τ_k(t)为所述时延扩展在所述第k个多径上随时间变化的相位特征，所述δ(θ-θ_k)为所述传输信号的空间扩展，所述θ_k为所述空间扩展在所述第k个多径上的所述相位特征，所述t为所述传输信号的所述传输时间，所述θ为所述传输信号的所述空间相位，所述τ为所述传输信号的所述角度相位，以及所述h(t,τ,θ)为所述处理后的所述传输信号。Preferably, the processing subunit includes: a processing module, configured to process the first signal parameter according to a preset formula, where the preset formula is

The K is the number of the multipaths, and the u _k (t) is a radio channel fading of the transmission signal on the kth multipath, and the δ[τ-τ _k (t)] is a delay spread of the transmission signal, wherein the τ _k (t) is a phase characteristic of the delay spread over time on the kth multipath, and the δ(θ-θ _k ) is the transmission Spatial expansion of the signal, the θ _k being the phase characteristic of the spatial extension on the kth multipath, the t being the transmission time of the transmission signal, and the θ being the transmission The spatial phase of the signal, the τ being the angular phase of the transmission signal, and the h(t, τ, θ) being the processed transmission signal.

Preferably, the acquiring unit includes: a second acquiring subunit, configured to acquire a second signal parameter of the processed transmission signal, where the second signal parameter is that the transmission signal is sent by the pre The parameter carried in the processing mode is processed, and the second signal parameter includes at least one of the following: a signal strength, a signal to noise ratio, a signal transmission rate, and a bit error rate; and a determining subunit configured to determine and according to the preset form. The test result corresponding to the second signal parameter.

Preferably, the apparatus further comprises: a filtering unit configured to filter electromagnetic waves that affect the transmission signal by using an absorbing darkroom.

In the embodiment of the present application, when the terminal communicates with the base station to be tested, the transmission signal between the terminal and the base station to be tested is processed by using a preset processing manner, where the preset processing manner includes at least: Fading processing, delay processing, and wavefront control processing, and finally obtaining test results of the base station to be tested according to the processed transmission signal, thereby reducing test cost and test difficulty, improving test accuracy, and improving test efficiency The technical effect further solves the technical problem that the base station has low testing efficiency in the prior art.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the present application, and are intended to be a part of this application. In the drawing:

FIG. 1 is a schematic flowchart diagram of an optional test method for a base station of a massive MIMO system according to an embodiment of the present application; FIG.

2 is a schematic flow chart of another optional test method for a base station of a massive MIMO system according to an embodiment of the present application;

3 is a schematic flow chart of still another optional test method for a base station of a massive MIMO system according to an embodiment of the present application;

4 is a schematic structural diagram of an optional test apparatus for a base station of a massive MIMO system according to an embodiment of the present application;

FIG. 5 is a schematic structural diagram of an optional test system for a base station of a massive MIMO system according to an embodiment of the present application; FIG.

6 is a schematic structural diagram of another optional test system for a base station of a massive MIMO system according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of still another optional test system for a base station of a massive MIMO system according to an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present application. It is an embodiment of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope shall fall within the scope of the application.

It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or order. It is to be understood that the data so used may be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

First, the technical terms involved in the embodiments of the present application are explained as follows:

MIMO: (Multiple-Input Multiple-Output) technology refers to the use of multiple transmit and receive antennas at the transmitting end and the receiving end, respectively, so that signals are transmitted and received through multiple antennas at the transmitting end and the receiving end, thereby Improve communication quality. It can make full use of space resources, realize multiple transmission and multiple reception through multiple antennas, and can increase the system channel capacity by multiple times without increasing spectrum resources and antenna transmission power, showing obvious advantages and being regarded as next generation mobile. The core technology of communication.

Example 1

In accordance with an embodiment of the present application, an embodiment of a test method for a base station of a massive MIMO system is provided, it being noted that the steps illustrated in the flowchart of the figures may be in a computer such as a set of computer executable instructions The steps are performed in the system, and although the logical order is shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

FIG. 1 is an optional test method for a base station of a massive MIMO system according to an embodiment of the present application. As shown in FIG. 1 , the method includes the following steps:

Step S102: When the terminal communicates with the base station to be tested, the transmission signal between the terminal and the base station to be tested is processed according to a preset processing manner, where the preset processing manner includes at least: fading processing, delay processing, and wavefront. Control processing

Step S104: Obtain a test result of the base station to be tested according to the processed transmission signal.

In the embodiment of the present application, when the terminal communicates with the base station to be tested, the transmission signal between the terminal and the base station to be tested is processed by using a preset processing manner, where the preset processing manner includes at least: The fading processing, the delay processing, and the wavefront control processing achieve the purpose of obtaining the test result of the base station to be tested according to the processed transmission signal, thereby achieving a reduction in test cost, an improvement in test accuracy, and an improvement in test efficiency. The technical effect further solves the technical problem that the base station has low test efficiency in the prior art.

Optionally, the terminal may be a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, or a terminal emulation meter. The terminal emulation instrument has functions of signal generation, signal transceiving and signal processing. The base station to be tested is a public mobile communication base station, which is a form of a radio station, and refers to a radio transceiver station that performs information transmission with a terminal through a mobile communication switching center in a certain radio coverage area. The base station to be tested in the present application may be a base station employing MIMO technology, and the base station may be provided with an antenna array including multiple antennas, and the antenna array may be used for transmitting or receiving signals. Multi-transmission and multi-reception through multiple antennas can multiply the channel capacity in the communication process between the base station and the terminal without increasing the spectrum resources and the antenna transmission power.

Optionally, the fading process refers to a simulated fading phenomenon or a multipath fading phenomenon to process the signal, and the fading is performed by Random strong fluctuations occur in the field strength of the receiving point caused by random multipath ray phase interference. In addition, multipath fading refers to the generation of multiple signals arriving at the receiver through different paths due to ground or surface reflection and atmospheric refraction during the transmission of the microwave signal, and the time-varying signal is synthesized by vector superposition. Path fading can be divided into flat fading and frequency selective fading.

Optionally, the delay processing refers to the analog delay phenomenon to process the signal, and the delay refers to the time required for one signal, message or packet to be transmitted from the other end of one network. It includes the transmission delay, propagation delay and processing delay. The sum of the delays of the above three can be called the total delay.

Optionally, the wavefront control process refers to processing the transmission signal by using a wave array formed during signal transmission. The wavefront, also known as the isophase, refers to the surface of the wave that the source of the wave propagates through the medium at the same time. The wavefront control process may include multiple power distribution processing, phase offset processing, and programmable attenuation processing. For example, when performing multi-wavefront control processing, its control logic can be as follows:

Define the vector:

Then the control logic of the horizontal plane is:

And the control logic of the spherical surface is:

It should be noted that the test model of the base station established by the test method for the base station of the massive MIMO system according to the present application can be applied in a laboratory or outdoors, for example, the model can reconstruct a large-scale MIMO wireless channel in a laboratory. Space, time characteristics. In addition, in order to ensure the achievability of the model, the physical distance of the test environment should be greater than the maximum antenna distance of the system. At the same time, the model also has the ability to build horizontal and spherical propagation models.

It should be noted that the optional test method for a large-scale MIMO system base station provided by the present application can be applied to base station testing, large-scale antenna array base station equipment testing, and large-scale antenna array terminal equipment. Testing and production inspection of large-scale antenna arrays.

Optionally, FIG. 2 is a schematic flowchart of another optional test method for a base station of a massive MIMO system according to an embodiment of the present application. As shown in FIG. 2, step S102 is performed according to a preset processing manner. The processing of the transmission signals between the base stations to be tested includes:

Step S202, acquiring transmission signals on each multipath, where multipath is generated when the terminal communicates with the base station to be tested;

Step S204: Acquire a first signal parameter of the transmission signal, and process the first signal parameter to obtain a processed transmission signal, where the first signal parameter is carried before the transmission signal is processed by the preset processing mode. The first signal parameter includes at least: transmission time, spatial phase, and angular phase.

Optionally, in the field of wireless communication, multipath refers to a phenomenon in which electromagnetic waves travel from a transmitting antenna to a receiving antenna through a plurality of paths. The scattering of electromagnetic waves by the atmosphere, the reflection and refraction of electromagnetic waves by the ionosphere, and the reflection of electromagnetic waves by surface objects such as mountains and buildings all cause multipath propagation. The test model of the base station established by the test method for the base station of the massive MIMO system according to the present application can simulate the propagation environment of the electromagnetic wave and generate a multipath phenomenon.

Optionally, processing the first signal parameter, and obtaining the processed transmission signal may include:

所述K为所述多径的个数，所述u_k(t)为所述传输信号在第k个多径上的无线信道衰落，所述δ[τ-τ_k(t)]为所述传输信号的时延扩展，所述τ_k(t)为所述时延扩展在所述第k个多径上随时间变化的相位特征，所述δ(θ-θ_k)为所述传输信号的空间扩展，所述θ_k为所述空间扩展在所述第k个多径上的所述相位特征，所述t为所述传输信号的所述传输时间，所述θ为所述传输信号的所述空间相位，所述τ为所述传输信号的所述角度相位，以及所述h(t,τ,θ)为所述处理后的所述传输信号。Step S10: processing the first signal parameter according to a preset formula, where the preset formula is

The K is the number of the multipaths, and the u _k (t) is a radio channel fading of the transmission signal on the kth multipath, and the δ[τ-τ _k (t)] is a delay spread of the transmission signal, wherein the τ _k (t) is a phase characteristic of the delay spread over time on the kth multipath, and the δ(θ-θ _k ) is the transmission Spatial expansion of the signal, the θ _k being the phase characteristic of the spatial extension on the kth multipath, the t being the transmission time of the transmission signal, and the θ being the transmission The spatial phase of the signal, the τ being the angular phase of the transmission signal, and the h(t, τ, θ) being the processed transmission signal.

It should be noted that the preset formula corresponds to the test model of the base station, and the test model describes time-varying fading characteristics and arbitrary delay spread characteristics of each multipath of the massive MIMO wireless channel. The test model can be composed of a multi-channel (k) channel fading simulator and a multi-channel (N) wavefront controller, and can realize three characteristics of wireless channel fading, delay spread and spatial expansion, thereby greatly reducing the characteristics. The algorithmic logic requirements of channel emulation reduce the need for communication systems for wireless channel emulators.

Optionally, FIG. 3 is a schematic flowchart of still another optional test method for a base station of a massive MIMO system according to an embodiment of the present application. As shown in FIG. 3, step S104 is performed according to the processed transmission signal. The test results of the base station include:

Step S302: Acquire a second signal parameter of the processed transmission signal, where the second signal parameter is a parameter carried by the transmission signal after being processed by a preset processing manner, and the second signal parameter includes at least one of the following: a signal strength, Signal to noise ratio, signal transmission rate and bit error rate;

Step S304, determining a test result corresponding to the second signal parameter according to the preset form.

For example, the base station A, the base station B, the base station C, and the base station D are respectively tested by using the test method for the mass MIMO system base station provided by the present application, and the test items and test results can be as shown in Table 1.

Table 1

Base station number Signal strength Signal transmission rate Bit error rate Overview Base station A Strong fast low excellent Base station B Strong Faster Lower Superior Base station C Weak Slower Higher Poor Base station D weak slow high difference

Optionally, as shown in Table 1, the three indicators (signal strength, signal transmission rate, respectively) of the base station A, the base station B, the base station C, and the base station D are respectively tested by using the test method for the base station of the massive MIMO system provided by the present application. And the bit error rate) test, the test result is: base station A has strong signal strength, fast signal transmission rate and low bit error rate, and its comprehensive evaluation is optimal, while base station D has weak signal strength and slow signal transmission rate. The error rate is high, and the comprehensive evaluation is the worst. The test conditions of the base station B and the base station C are not described herein.

For example, the second parameter corresponding to the base station A is evaluated by using the test method for the base station A of the mass MIMO system provided by the present application, and the test result of the base station A can be obtained. The test result can be as shown in Table 2. It should be noted that the test results in Table 2 are the single test results corresponding to the second parameter, and the correspondence between the second parameter and the single test result and the given rule can be manually set to test the performance of the base station. There may be multiple second parameters, and the application does not limit this.

Table 2

Signal strength Test Results Transmission rate Test Results Bit error rate Test Results ≤60 Strong 4M< fast ≤0.1% excellent (60,80) Strong (1M, 4M) Faster (0.1%, 1%) Superior (80,100] Weak (128K, 1M] Slower (1%, 2.5%) Poor 100< weak 128K≤ slow 2.5%< difference

It should be noted that when the second parameter in Table 2 is the signal strength, the unit of the second parameter is dBm; when the second parameter in Table 2 is the transmission rate, the unit of the second parameter is Byte. By obtaining the second parameters of the base station A, and according to the correspondence between the second parameter and the test result in Table 2, the evaluation results of the test indexes of the base station A can be obtained.

Optionally, when the terminal communicates with the base station to be tested, the method further includes:

In step S20, the electromagnetic wave that affects the transmission signal is filtered by the absorbing darkroom.

Alternatively, the main material of the anechoic chamber is a polyurethane absorbing sponge SA (high frequency use), and in addition, when testing electromagnetic compatibility, a ferrite absorbing material may be used because the frequency is too low. The main working principle of the absorbing darkroom is based on the law that the electromagnetic wave propagates from the low magnetic direction to the high magnetic permeability in the medium, and the electromagnetic wave is guided by the high magnetic permeability absorbing material, and the radiant energy of the electromagnetic wave is absorbed by the resonance, and then coupled by the electromagnetic wave. The energy of electromagnetic waves is converted into heat. The absorbing darkroom is used to filter the electromagnetic waves that affect the transmitted signal to avoid clutter interference and improve the test accuracy and efficiency of the tested base station.

In the embodiment of the present application, when the terminal communicates with the base station to be tested, the transmission signal between the terminal and the base station to be tested is processed by using a preset processing manner, where the preset processing manner includes at least: The fading processing, the delay processing, and the wavefront control processing achieve the purpose of obtaining the test result of the base station to be tested according to the processed transmission signal, thereby achieving a reduction in test cost, an improvement in test accuracy, and an improvement in test efficiency. The technical effect further solves the technical problem that the base station has low test efficiency in the prior art.

Example 2

According to another aspect of the embodiments of the present application, a testing apparatus for a base station of a massive MIMO system is further provided. As shown in FIG. 4, the apparatus may include: a processing unit 401, and an obtaining unit 403.

The processing unit 401 is configured to: when the terminal communicates with the base station to be tested, process the transmission signal between the terminal and the base station to be tested according to a preset processing manner, where the preset processing manner includes at least: fading processing, delay Processing and wavefront control processing; the obtaining unit 403 is configured to obtain a test result of the base station to be tested according to the processed transmission signal.

Optionally, the processing unit 401 includes: a first acquiring subunit, configured to acquire a transmission signal on each multipath, where the multipath is generated when the terminal communicates with the base station to be tested; and the processing subunit is configured to acquire the transmission signal. The first signal parameter is processed, and the processed signal is processed, wherein the first signal parameter is a parameter carried before the transmission signal is processed in a preset processing manner, and the first signal parameter includes at least : Transmission time, spatial phase, and angular phase.

所述K为所述多径的个数，所述u_k(t)为所述传输信号在第k个多径上的无线信道衰落，所述 δ[τ-τ_k(t)]为所述传输信号的时延扩展，所述τ_k(t)为所述时延扩展在所述第k个多径上随时间变化的相位特征，所述δ(θ-θ_k)为所述传输信号的空间扩展，所述θ_k为所述空间扩展在所述第k个多径上的所述相位特征，所述t为所述传输信号的所述传输时间，所述θ为所述传输信号的所述空间相位，所述τ为所述传输信号的所述角度相位，以及所述h(t,τ,θ)为所述处理后的所述传输信号。Optionally, the processing subunit includes: a processing module, configured to process the first signal parameter according to a preset formula, where the preset formula is

The K is the number of the multipaths, and the u _k (t) is a radio channel fading of the transmission signal on the kth multipath, and the δ[τ-τ _k (t)] is a delay spread of the transmission signal, wherein the τ _k (t) is a phase characteristic of the delay spread over time on the kth multipath, and the δ(θ-θ _k ) is the transmission Spatial expansion of the signal, the θ _k being the phase characteristic of the spatial extension on the kth multipath, the t being the transmission time of the transmission signal, and the θ being the transmission The spatial phase of the signal, the τ being the angular phase of the transmission signal, and the h(t, τ, θ) being the processed transmission signal.

Optionally, the obtaining unit 403 includes: a second acquiring sub-unit, configured to acquire a second signal parameter of the processed transmission signal, where the second signal parameter is a parameter carried by the transmission signal after being processed by a preset processing manner, The second signal parameter includes at least one of the following: a signal strength, a signal to noise ratio, a signal transmission rate, and a bit error rate; and a determining subunit configured to determine a test result corresponding to the second signal parameter according to the preset form.

Optionally, the apparatus further includes: a filtering unit configured to filter electromagnetic waves that affect the transmitted signal by using the absorbing darkroom.

In the embodiment of the present application, when the terminal communicates with the base station to be tested, the transmission signal between the terminal and the base station to be tested is processed by using a preset processing manner, where the preset processing manner includes at least: The fading processing, the delay processing, and the wavefront control processing achieve the purpose of obtaining the test result of the base station to be tested according to the processed transmission signal, thereby achieving a reduction in test cost, an improvement in test accuracy, and an improvement in test efficiency. The technical effect further solves the technical problem that the base station has low test efficiency in the prior art.

Example 3

According to another aspect of the embodiments of the present application, a test system for a base station of a massive MIMO system is further provided. As shown in FIG. 5, the system includes: a multi-channel fading simulator 501, and multi-wavefront control. The 503 and the massive MIMO antenna array 505 are connected to the multipath fading simulator 501 and the massive MIMO antenna array 505, respectively.

Optionally, the multi-channel channel fading simulator 501 can implement simulation reconstruction of a propagation fading and propagation delay model, and the multi-wave array controller 503 can implement simulation reconstruction of multi-wavefront control processing, the large-scale The MIMO antenna array 505 is typically an array of antennas of the order of hundreds of magnitude, the number of antenna elements being equal to the product of the respective paths of the multiple channel fading simulator 501 and the multiplexed wavefront controller 503.

Optionally, as shown in FIG. 6, in the test system for the base station of the massive MIMO system, the multiplexed wavefront controller 503 and the massive MIMO antenna array 505 may be disposed in the anechoic chamber 601, the multipath The channel fading simulator 501 can be connected to a terminal such as a mobile phone, and the multiplex channel fading simulator 501 can include a plurality of fading modes. Block FM (Fading Module) and delay module DM (Delay Module), the multiplex wavefront controller 503 may include a wavefront controller 605 (Wavefront Controller), a water level controller 607 (Plane Controller), and a spherical surface control 609 (Spherical Controller).

Optionally, as shown in FIG. 7, the physical structure of the multiplexer controller 503 may further include a multi-way power splitter 701, a phase shifter 703, a programmable attenuator 705, and an antenna probe 707. It should be noted that each path of the multiplex wavefront controller 503 includes at least one phase shifter 703, one programmable attenuator 705, and one antenna probe 707.

It should be noted that, for the test system for the base station of the massive MIMO system provided by the present application, the size of the test area is determined by the multiplexed wavefront controller. The larger the test area, the larger the number of multipaths of the multipath wavefront controller and the higher the cost. The algorithm provided by the present application has no limitation on the number of channel emulator ports. In addition, the test system has limited the construction size requirements of the anechoic chamber, and its scale will mainly depend on the size specifications of the large-scale MIMO antenna.

In the embodiment of the present application, when the terminal communicates with the base station to be tested, the transmission signal between the terminal and the base station to be tested is processed by using a preset processing manner, where the preset processing manner includes at least: The fading processing, the delay processing, and the wavefront control processing achieve the purpose of obtaining the test result of the base station to be tested according to the processed transmission signal, thereby achieving a reduction in test cost, an improvement in test accuracy, and an improvement in test efficiency. The technical effect further solves the technical problem that the base station has low test efficiency in the prior art.

Example 4

Embodiments of the present application also provide a storage medium. Optionally, in this embodiment, the foregoing storage medium may store the program code of the test method for the base station of the massive MIMO system in the first embodiment.

Optionally, in this embodiment, the foregoing storage medium may be located in at least one of the plurality of network devices in the computer network.

Optionally, in this embodiment, the storage medium may be configured to store program code for performing the following steps: when the terminal communicates with the base station to be tested, the transmission between the terminal and the base station to be tested according to a preset processing manner The signal is processed, wherein the preset processing manner includes at least: fading processing, delay processing, and wavefront control processing; and obtaining test results of the base station to be tested according to the processed transmission signal.

Optionally, in this embodiment, the storage medium may be further configured to store program code for performing the following steps: acquiring transmission signals on the respective multipaths, wherein the multipath is generated when the terminal communicates with the base station to be tested. Obtaining a first signal parameter of the transmission signal, and processing the first signal parameter to obtain a processed transmission signal, wherein the first signal parameter is a parameter carried before the transmission signal is processed by the preset processing mode, first The signal parameters include at least: transmission time, spatial phase, and angular phase.

K为多径的个数，u_k(t)为传输信号在第k个多径上的无线信道衰落，δ[τ-τ_k(t)]为传输信号的时延扩展，τ_k(t)为时延扩展在第k个多径上随时间变化的相位特征，δ(θ-θ_k)为传输信号的空间扩展，θ_k为空间扩展在第k个多径上的相位特征，t为传输信号的传输时间，θ为传输信号的空间相位，τ为传输信号的角度相位，以及h(t,τ,θ)为处理后的传输信号。Optionally, in this embodiment, the storage medium may be further configured to store program code for performing the following steps: processing the first signal parameter according to a preset formula, wherein the preset formula is

K is the number of multipaths, u _k (t) is the wireless channel fading of the transmitted signal on the kth multipath, δ[τ-τ _k (t)] is the delay spread of the transmitted signal, τ _k (t For the delay characteristic, the phase characteristic changes with time on the kth multipath, δ(θ-θ _k ) is the spatial extension of the transmitted signal, and θ _k is the phase characteristic of the spatial extension on the kth multipath, t To transmit the transmission time of the signal, θ is the spatial phase of the transmitted signal, τ is the angular phase of the transmitted signal, and h(t, τ, θ) is the processed transmitted signal.

Optionally, in this embodiment, the storage medium may be further configured to store program code for performing the following steps: acquiring a second signal parameter of the processed transmission signal, wherein the second signal parameter is a pre-processed transmission signal The parameter carried in the processing mode is processed, and the second signal parameter includes at least one of the following: a signal strength, a signal to noise ratio, a signal transmission rate, and a bit error rate; and determining a test result corresponding to the second signal parameter according to the preset form. .

Alternatively, in the present embodiment, the storage medium may in turn be arranged to store program code for performing the following steps: filtering the electromagnetic waves affecting the transmitted signal with an absorbing darkroom.

In the embodiment of the present application, when the terminal communicates with the base station to be tested, the transmission signal between the terminal and the base station to be tested is processed by using a preset processing manner, where the preset processing manner includes at least: fading processing and delay processing. And the wavefront control processing achieves the purpose of obtaining the test result of the base station to be tested according to the processed transmission signal, thereby achieving the technical effect of reducing the test cost, improving the test accuracy, and improving the test efficiency, thereby solving the prior art. The base station tests technical problems with lower efficiency.

The serial numbers of the embodiments of the present application are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

In the above-mentioned embodiments of the present application, the descriptions of the various embodiments are different, and the parts that are not detailed in a certain embodiment can be referred to the related descriptions of other embodiments.

In the several embodiments provided by the present application, it should be understood that the disclosed technical contents may be implemented in other manners. The device embodiments described above are only schematic. For example, the division of the unit may be a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or may be Integrate into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, unit or module, and may be electrical or otherwise.

The unit described as a separate component may or may not be physically separated as a unit display The components shown may or may not be physical units, ie may be located in one place or may be distributed over multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk, and the like. .

The above description is only a preferred embodiment of the present application, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present application. It should be considered as the scope of protection of this application.

Claims (10)

A test method for a base station of a massive MIMO system, comprising: When the terminal communicates with the base station to be tested, the transmission signal between the terminal and the base station to be tested is processed according to a preset processing manner, where the preset processing manner includes at least: fading processing, delay processing, and Wavefront control processing; And obtaining a test result of the base station to be tested according to the processed transmission signal. The method according to claim 1, wherein the processing of the transmission signal between the terminal and the base station to be tested according to a preset processing manner comprises: Acquiring the transmission signal on each multipath, where the multipath is generated when the terminal communicates with the base station to be tested; Obtaining a first signal parameter of the transmission signal, and processing the first signal parameter to obtain the processed transmission signal, where the first signal parameter is that the transmission signal is not The preset processing manner processes the parameters carried before, and the first signal parameter includes at least: a transmission time, a spatial phase, and an angular phase. The method of claim 2, wherein the processing the first signal parameter to obtain the processed transmission signal comprises: Processing the first signal parameter according to a preset formula, where the preset formula is

The K is the number of the multipaths, and the u _k (t) is a radio channel fading of the transmission signal on the kth multipath, and the δ[τ-τ _k (t)] is a delay spread of the transmission signal, wherein the τ _k (t) is a phase characteristic of the delay spread over time on the kth multipath, and the δ(θ-θ _k ) is the transmission Spatial expansion of the signal, the θ _k being the phase characteristic of the spatial extension on the kth multipath, the t being the transmission time of the transmission signal, and the θ being the transmission The spatial phase of the signal, the τ being the angular phase of the transmission signal, and the h(t, τ, θ) being the processed transmission signal. The method according to claim 1, wherein said obtaining said said signal based on said processed transmission signal The test results of the base station include: Obtaining, by the second signal parameter, the second signal parameter of the processed signal, where the second signal parameter is a parameter carried by the transmission signal after being processed by the preset processing mode, where the second signal parameter is at least Including one of the following: signal strength, signal to noise ratio, signal transmission rate, and bit error rate; Determining the test result corresponding to the second signal parameter according to a preset form. The method of claim 1, wherein when the terminal is in communication with the base station to be tested, the method further comprises: The electromagnetic wave that affects the transmitted signal is filtered using an absorbing darkroom. A test apparatus for a base station of a massive MIMO system, comprising: a processing unit, configured to: when the terminal communicates with the base station to be tested, process the transmission signal between the terminal and the base station to be tested according to a preset processing manner, where the preset processing manner includes at least: fading processing , delay processing and wavefront control processing; And an obtaining unit, configured to obtain a test result of the base station to be tested according to the processed transmission signal. The apparatus of claim 6 wherein said processing unit comprises: a first acquiring subunit, configured to acquire the transmission signal on each multipath, where the multipath is generated when the terminal communicates with the base station to be tested; a processing subunit, configured to acquire a first signal parameter of the transmission signal, and process the first signal parameter to obtain the processed transmission signal, where the first signal parameter is The transmission signal is processed by the preset processing mode, and the first signal parameter includes at least: a transmission time, a spatial phase, and an angular phase. The apparatus of claim 7 wherein said processing subunit comprises: a processing module, configured to process the first signal parameter according to a preset formula, where the preset formula is The K is the number of the multipaths, and the u _k (t) is a radio channel fading of the transmission signal on the kth multipath, and the δ[τ-τ _k (t)] is a delay spread of the transmission signal, wherein the τ _k (t) is a phase characteristic of the delay spread over time on the kth multipath, and the δ(θ-θ _k ) is the transmission Spatial expansion of the signal, the θ _k being the phase characteristic of the spatial extension on the kth multipath, the t being the transmission time of the transmission signal, and the θ being the transmission The spatial phase of the signal, the τ being the angular phase of the transmission signal, and the h(t, τ, θ) being the processed transmission signal. The apparatus of claim 6, wherein the obtaining unit comprises: a second acquiring sub-unit, configured to acquire a second signal parameter of the processed transmission signal, where the second signal parameter is a parameter carried by the transmission signal after being processed by the preset processing mode The second signal parameter includes at least one of the following: signal strength, signal to noise ratio, signal transmission rate, and bit error rate; Determining a subunit, configured to determine the test result corresponding to the second signal parameter according to a preset form. The apparatus of claim 6 wherein said apparatus further comprises: And a filtering unit configured to filter electromagnetic waves that affect the transmission signal by using an anechoic chamber.

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