[go: up one dir, main page]

WO2009000185A1 - Procédé de transmission et dispositif basé sur un multiplexage par répartition orthogonale de la fréquence (ofdm) - Google Patents

Procédé de transmission et dispositif basé sur un multiplexage par répartition orthogonale de la fréquence (ofdm) Download PDF

Info

Publication number
WO2009000185A1
WO2009000185A1 PCT/CN2008/071184 CN2008071184W WO2009000185A1 WO 2009000185 A1 WO2009000185 A1 WO 2009000185A1 CN 2008071184 W CN2008071184 W CN 2008071184W WO 2009000185 A1 WO2009000185 A1 WO 2009000185A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel information
bandwidth
subcarrier
data
area
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2008/071184
Other languages
English (en)
Chinese (zh)
Inventor
Sheng Liu
Xin Chang
Tao Qian
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2009000185A1 publication Critical patent/WO2009000185A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path

Definitions

  • the present invention relates to the field of wireless mobile communication technologies, and in particular, to a transmission method and apparatus based on orthogonal frequency division multiplexing, a method for implementing a frame structure, and a transmitter.
  • the system sampling rate also increases, and the time of the symbol is continuously reduced.
  • the distribution of the multipath delay is determined by the environment and is not affected by the system bandwidth selection. Severe Inter Symbol Interference (ISI).
  • ISI Severe Inter Symbol Interference
  • Multipath delay is an environmental effect that cannot be changed by the receiver. Increasing the time interval of transmitting symbols reduces the transmission rate. In this case, Orthogonal Frequency Division Multiplexing (OFDM) has appeared. Since the addition of a cyclic prefix (CP, Cyclic Prefix) during OFDM transmission can reduce ISI interference and improve spectrum utilization, the existing 3G evolution system has adopted OFDM as a basic transmission technology.
  • CP cyclic prefix
  • data needs to be modulated during data transmission, and the modulated data is mapped to an OFDM subcarrier for transmission.
  • the system consists of a certain number of OFDM symbols, and then these subframes constitute a frame, and the subcarrier bandwidths of all OFDM symbols are the same.
  • the first technology is through the third generation partnership program long-term evolution (LTE, Long Term Evolution) A common frame structure in the system for transmitting data.
  • LTE Long Term Evolution
  • the prior art defines two slot structures for downlink transmission, that is, 7 and 6 OFDM symbols, the difference being that the two slot structures have different CP lengths.
  • the downlink transmission parameters are shown in Table 1:
  • the subcarrier bandwidth of the prior art 1 is fixed, and the FFT size is changed to adapt to different Transmission bandwidth.
  • the slots of the uplink transmission and the downlink transmission in the prior art are both 0.5 ms. In the general frame structure, two consecutive 0.5 ms parity slots are combined into one 1 ms subframe, and then 10 consecutive subframes are combined into one. For a 10ms frame, data can only be transmitted to the base station in the specified time slot. This ensures that the data arriving at the base station does not overlap.
  • the second technique is to transmit data through a frame structure of an IEEE 802.16 wireless metropolitan area network (OFDM) orthogonal frequency division multiple access (OFDM) time division duplex (TDD) mode.
  • the TDD frame structure is composed of a downlink subframe, an uplink subframe, a Transmit Transition Gap (RTG), and a Receive Transition Gap (RTG), and the downlink subframe and the uplink subframe are consecutively identical.
  • the length of the OFDM symbol is composed.
  • the prior art subcarrier bandwidth is also fixed, and the FFT Size is changed to adapt to different transmission bandwidths.
  • the transmission parameters corresponding to the prior art 2 are as shown in Table 2:
  • the third technology of the prior art transmits data through a frame structure in a TDD mode in the IEEE802.16j standard.
  • the IEEE 802.16j standard is a wireless broadband access system under a relay structure, and the frame structure in the TDD mode is divided into a transparent mode and Two structures in non-transparent mode.
  • the base station frame structure is composed of a downlink subframe and an uplink subframe and a TTG. RTG composition.
  • the downlink subframe and the uplink subframe are respectively divided into two parts: an access zone and a relay zone, which are respectively used for a subscriber station and a base station (BS, Base Station) or a relay station (Relay Station). Information transmission between the relay station and the base station.
  • the frame structure of the relay station is similar to that of the base station, except that the relay TTG and the relay RTG are added between the access area and the relay area.
  • This prior art subcarrier bandwidth is also fixed and adapts to different transmission bandwidths by changing the FFT Size.
  • the standard specified transmission parameters are consistent with the specifications in IEEE 802.16 Wireless Metropolitan Area Network OFDMA.
  • the above prior art techniques are adapted to different transmission bandwidths by changing the FFT Size, and the subcarrier bandwidths corresponding to different transmission bandwidth conditions are fixed, so that the effective symbol time length is limited, and the utilization efficiency of the spectrum resources cannot be effectively improved. .
  • the ratio of CP to effective symbol time becomes a key indicator to measure the efficiency of the OFDM transmission system.
  • the above three prior art technologies all set the subcarrier bandwidth to ensure the transmission performance under the worst channel condition, and the subcarrier bandwidth requires at least 10-15 times the maximum Doppler frequency shift, and thus the subcarrier bandwidth cannot be used. Optimized design, which can not effectively improve the utilization of spectrum resources.
  • Embodiments of the present invention provide a transmission method and apparatus based on orthogonal frequency division multiplexing, which can improve utilization of spectrum resources.
  • Embodiments of the present invention provide a method for implementing a frame structure, which makes a subcarrier bandwidth in a frame variable.
  • Embodiments of the present invention provide a transmitter capable of making a subcarrier bandwidth in a frame variable.
  • An aspect of the present invention provides a transmission method based on orthogonal frequency division multiplexing, including: acquiring channel information and traffic, setting different subcarrier bandwidths for each region according to the channel information, and according to the The channel information and the traffic volume are allocated to the subcarriers, and the time length of each area is obtained according to the allocation result, and the data is allocated to the area corresponding to the time length for transmission.
  • an embodiment of the present invention provides a transmission apparatus based on orthogonal frequency division multiplexing.
  • the device includes:
  • a partitioning unit configured to acquire channel information and traffic, and divide the transmission data in the frame into at least two regions of variable length, and set different subcarrier bandwidths for each region according to the channel information;
  • a scheduling unit configured to acquire subcarriers corresponding to the bandwidth set by the partitioning unit, allocate subcarriers according to channel information and traffic, and obtain a time length of each region according to the allocation result, and allocate data to the The area corresponding to the length of time is transmitted.
  • Another aspect of the present invention provides a method for implementing a frame structure, including: acquiring channel information, setting different subcarrier bandwidths for each region according to the channel information, and transmitting, by using the subcarriers, Different types of data.
  • an embodiment of the present invention provides a transmitter, where the transmitter includes:
  • a first partition unit configured to acquire channel information, and divide the transmission data in the frame into at least two regions with variable lengths of time, and set different subcarrier bandwidths for each region according to the channel information;
  • a bearer unit configured to acquire a subcarrier corresponding to a bandwidth set by the first partition unit, and carry different types of data that need to be sent by using the subcarrier.
  • the embodiment of the present invention sets different sub-carrier bandwidths for each area, and allocates the sub-carriers according to channel information and traffic volume, and then obtains according to the allocation result.
  • the length of time of each area, and then the data is allocated to the area corresponding to the length of time for transmission.
  • the embodiment of the present invention does not need to obtain different sub-carrier bandwidths by changing the sampling rate of the system, and the sub-carrier bandwidth is variable, so that the utilization of the spectrum resources can be effectively improved.
  • Another technical solution has the following advantages or advantages: since the embodiment of the present invention first divides the transmission data in the frame into at least two regions according to the length of time, and sets different subcarrier bandwidths for each region according to the channel information, and passes The subcarriers carry data to be transmitted, so that the subcarrier bandwidth is variable, thereby effectively increasing the ratio of the effective symbol time to the CP, thereby achieving the lifting frequency.
  • FIG. 1 is a flowchart of a transmission method based on orthogonal frequency division multiplexing according to an embodiment of the present invention
  • Embodiment 1 of the present invention is a schematic diagram of a frame structure in Embodiment 1 of the present invention.
  • Embodiment 3 is a schematic diagram of a frame structure in Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of a frame structure of a base station according to Embodiment 3 of the present invention.
  • FIG. 6 is a schematic diagram of a frame structure of a third relay station according to an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of a transmission apparatus based on orthogonal frequency division multiplexing according to Embodiment 5 of the present invention.
  • Figure 8 is a schematic diagram of a transmitter of a sixth embodiment of the present invention.
  • Embodiment 1 A transmission method based on orthogonal frequency division multiplexing, the embodiment is applied to a cellular network system, and the method flow is as shown in FIG. 1 , which specifically includes the following steps:
  • Step 101 Receive data that needs to be transmitted, where the party that sends the data may be a base station or a mobile station.
  • Domain 1 and zone 2 for example, the frame structure shown in Figure 2 divides the downlink subframes in the frame into a downlink high speed zone (DL Fast Zone) and a downlink low speed zone (DL Slow Zone), which will be in the frame.
  • the uplink subframes are divided into an uplink fast zone (UL Fast Zone) and an uplink low speed zone (UL Slow Zone).
  • the parameter included in the user channel state has a maximum multipath delay.
  • Step 103 Obtain user channel status and traffic information, and set different subcarrier bandwidths for OFDM transmission in zone 1 and zone 2 according to user channel state information. Usually based on channel status The Doppler shift parameter is used to set the subcarrier bandwidth, for example, to set the subcarrier bandwidth to a maximum Doppler shift greater than 10 to 15 times.
  • the area with a wider subcarrier bandwidth is used for high-speed user data transmission, and the area with a narrow sub-carrier bandwidth is used for medium- and low-speed user data transmission.
  • the DL Fast Zone to which the wider subcarrier bandwidth belongs in FIG. 2 is used for data transmission of high speed mobile users
  • the DL Slow Zone to which the narrower subcarrier bandwidth belongs is used for data transmission of low and medium speed mobile users.
  • the UL Fast Zone and the UL Slow Zone have the same meaning. In order to ensure that the pilot and common control signaling can be reliably received by all users, the signaling of these two parts is also transmitted in the same configuration as the DL Fast Zone.
  • the base station can perform reasonable DL according to the user channel state and traffic volume. Settings for Fast Zone and DL Slow Zone.
  • FDD Frequency Division Dual
  • the user also needs to perform the uplink synchronization process. Although the uplink and downlink bands are separated by a certain frequency band, the estimation of the moving speed range is the same. Therefore, both the user channel state and the traffic information can be considered as known information to the base station, and no additional signaling acquisition is required.
  • Step 104 In order to further improve flexibility and spectrum efficiency, different CP lengths are set according to the maximum multipath delay characteristic of the user channel state to distinguish users, so that each region adds two combinations of long CP and short CP.
  • the subcarrier bandwidths of the long CP area and the short CP area corresponding to each area are the same.
  • Step 105 The total length of the OFDM symbols is inconsistent due to the flexible combination of regions, To ensure consistent frame length, the CP of the OFDM symbol in which the control signaling transmission (for example, broadcast control data) is located can be extended to obtain more reliable transmission performance.
  • the control signaling transmission for example, broadcast control data
  • Step 106 Allocate the subcarriers according to the user channel state and the traffic information, and obtain the length of each area according to the allocation result, and send the time length to all users through the resource assignment broadcast message.
  • allocations are made according to different speeds, locations, and user groups in the subcarrier time domain or frequency domain.
  • Step 107 Allocate data to a corresponding area according to the length of time for transmission.
  • the foregoing embodiment is a preferred embodiment of the present invention.
  • the embodiment not only performs area division on the downlink subframe, but also performs area division on the uplink subframe, and also sets CPs of different lengths for each area. In the upper area, you can also set two or more types of CPs for each area. Divide, then set CPs of different lengths for the area corresponding to the downlink subframe or the uplink subframe.
  • Embodiment 2 A transmission method based on orthogonal frequency division multiplexing, except that there is no step 104 and step 105, the other steps are basically the same as those in the first embodiment.
  • This embodiment divides the downlink subframe in the frame into a downlink high speed. In the area and the downlink low-speed area, the uplink subframes in the frame are divided into an uplink high-speed area and an uplink low-speed area, as shown in FIG. 3, and corresponding transmission parameters are as shown in Table 4:
  • the TDD system should ensure that the uplink and downlink switching points of the neighboring cells are consistent, and the frame length is consistent for the FDD system, the two different area length settings are limited by the consistent subframe length, and some combination schemes need to add additional Idle time reduces efficiency, and Table 4 lists only some of the combined schemes that can improve system spectral efficiency.
  • the uplink configuration is similar to the downstream configuration, and is not listed here. It should be noted that in these combinations, the area of the low- and medium-speed users occupies a larger proportion, which is consistent with the characteristics in the actual application scenario.
  • the system overhead of this embodiment is higher than that of the first embodiment, so that the spectrum efficiency of the system of this embodiment is relatively low.
  • only the uplink subframe or the downlink subframe may be divided into regions, and then the subcarrier bandwidth is set for each region.
  • the second embodiment of the present invention may also use other parameters to implement the embodiments of the present invention.
  • the relay station can expand cell coverage, reduce interference, and increase capacity through channel coding and re-allocation of radio resources.
  • the location of the base station and the relay station (RS, Relay Station) is relatively fixed, the Doppler frequency shift caused by mobility is small, and the distance between the base station and the RS is much smaller than the cell radius, thereby reducing the maximum multipath delay.
  • the existing OFDMA-based wireless relay access systems are designed to meet the sub-carrier spacing settings for cell coverage and high-speed mobility, and do not consider the full use of the radio link characteristics between the base station and the RS, and thus cannot improve the system spectral efficiency.
  • the embodiment of the present invention also provides a corresponding implementation manner.
  • Embodiment 3 A transmission method based on orthogonal frequency division multiplexing, which is applied to relay wireless Accessing the network, the method flow is shown in Figure 4, and specifically includes the following steps:
  • Step 401 Receive data that needs to be transmitted, where the party that sends the data may be a base station or a relay station.
  • the relay zone for example, FIG. 5 and FIG. 6 divide the downlink subframe in the frame into a downlink access zone (DL Access Zone) and a downlink relay zone (DL Relay Zone), and divide the uplink subframe in the frame into uplinks.
  • the user channel status includes parameters with a maximum multipath delay.
  • Step 403 Obtain different channel state and traffic information of the relay link and the access link, and set different OFDM transmissions in zone 1 and zone 2 according to different channel states of the relay link and the access link.
  • Subcarrier bandwidth is typically set based on the Doppler shift parameter of the channel state, e.g., the subcarrier bandwidth is set to a maximum Doppler shift greater than 10 to 15 times.
  • the data of the access link is transmitted by the area of the subcarrier to which the bandwidth is wide, and the data of the relay link is transmitted by the area of the subcarrier to which the bandwidth is narrow.
  • the UL Access Zone and the UL Relay Zone have the same meaning.
  • the signaling of these two parts also uses the same configuration parameters as the downlink access area.
  • Step 404 In order to further improve flexibility and spectrum efficiency, different CPs are set according to the maximum multipath delay characteristic of the channel state to distinguish users.
  • a shorter CP is set for the relay area; and the transmission distance between the base station or the relay station and the user is longer, so a longer CP is set in the access area.
  • Step 405 The total length of the OFDM symbols is inconsistent due to the flexible combination of the regions.
  • the CP of the OFDM symbol in which the control signaling transmission (for example, broadcast control data) is located may be extended to obtain more reliable transmission performance. .
  • Step 406 Allocate the subcarriers according to the user channel state and the traffic information, and obtain the length of each area according to the allocation result, and send the time length to all users by using the resource assignment broadcast message.
  • allocations are made according to different speeds, locations, and user groups in the subcarrier time domain or frequency domain.
  • Step 407 Allocate data to an area corresponding to the length of time for transmission.
  • the transmission parameters corresponding to the third embodiment of the present invention are as shown in Table 5:
  • Table 8 assumes that two or more CPs are set for each zone.
  • the embodiment of the present invention may perform area division only on the downlink subframe or the uplink subframe, and then set different CPs for the area corresponding to the downlink subframe or the uplink subframe.
  • the third embodiment of the present invention may also use other parameters to implement the embodiments of the present invention.
  • Embodiment 4 A method for implementing a frame structure, the method includes: In this step, an embodiment of the present invention may divide a subframe in a frame into a high-speed region and a medium-low-speed region, and may further divide the subframe in the frame. It is an access area and a relay area.
  • the step further includes setting CPs of different lengths for each area corresponding to the subframe, such as a long CP and a short CP.
  • the embodiment of the present invention can set a wider subcarrier bandwidth for the high speed region and a narrower subcarrier bandwidth for the medium and low speed region. Then, the wide-band subcarriers are used to carry the high-speed mobile user data that needs to be transmitted, and the sub-carriers with narrow bandwidth are used to carry the medium and low-speed mobile user data that needs to be transmitted.
  • the embodiment of the present invention may further set a wider subcarrier bandwidth for the access region and a narrower subcarrier bandwidth for the relay region. Then, the sub-carriers with wide bandwidth are used to carry the access link data to be transmitted, and the sub-carriers with narrow bandwidth are used to carry the relay link data to be transmitted.
  • the another program may be stored in a computer readable storage medium, and when executed, the program includes the following steps: acquiring channel information, and then setting different subcarrier bandwidths for each region according to the channel information, and by using the The subcarriers carry different types of data that need to be sent.
  • the storage medium may be a ROM, a RAM, a magnetic disk or an optical disk, or the like.
  • Embodiment 5 A transmission device based on orthogonal frequency division multiplexing, as shown in FIG. 7, the device includes: a partitioning unit 701, a scheduling unit 702, where:
  • a partitioning unit 701 configured to acquire channel information and traffic, and divide the transmission data in the frame into at least two regions with variable lengths of time, and set different subcarrier bandwidths for each region according to the channel information, where the channel The information includes the channel status.
  • the subcarrier bandwidth is typically set based on the Doppler shift parameter of the channel state, e.g., the subcarrier bandwidth is set to a maximum Doppler shift greater than 10 to 15 times.
  • the scheduling unit 702 is configured to acquire subcarriers corresponding to the bandwidth set by the partitioning unit 701, and allocate the subcarriers according to the channel information and the traffic volume acquired by the partitioning unit 701, and obtain the length of time of each region according to the allocation result, and The data is allocated to the corresponding area for transmission according to the length of time.
  • the partitioning unit 701 of the above embodiment may divide the uplink subframe or the downlink subframe into a high speed region and a medium and low speed region.
  • CPs of different lengths may be set for each region.
  • the above apparatus may be implemented by software or hardware modules having the same or corresponding functions in addition to the implementations provided in the fifth embodiment.
  • Embodiment 6 a transmitter, as shown in FIG. 8, the transmitter includes: a first partition unit 801, a bearer unit 802;
  • a first partition unit 801 configured to acquire channel information, and divide the transmission data in the frame into There are two regions of variable length, and different subcarrier bandwidths are set for each region according to channel information, and the channel information includes channel states.
  • the subcarrier bandwidth is typically set according to the Doppler shift parameter of the channel state, for example, the subcarrier bandwidth is set to a maximum Doppler shift greater than 10 to 15 times.
  • the bearer unit 802 is configured to acquire subcarriers corresponding to the bandwidth set by the first partitioning unit 801, and carry different types of data that need to be sent by using the subcarriers, for example, use a subcarrier with a wide bandwidth to carry a high speed that needs to be sent.
  • the mobile subscriber data or the access link data is used, and the subcarriers with narrow bandwidth are used to carry the medium and low speed mobile subscriber data or the relay link data that needs to be transmitted.
  • the above apparatus can be implemented by software or hardware modules having the same or corresponding functions in addition to the implementations provided in Embodiment 6.
  • the TDD system divides the frame into the difference between the uplink subframe and the downlink subframe, and the uplink and downlink frame structures may be the same or different.
  • the embodiment of the present invention is also applicable to the FDD system, but the FDD system does not have separate uplink and downlink subframes, and is collectively referred to as a subframe. Setting different subcarrier bandwidths for each of the at least two regions, and according to the channel information, and allocating the subcarriers according to the channel information and the traffic volume, and then obtaining the time length of each region according to the allocation result, and then the data The area corresponding to the length of time is allocated for transmission.
  • the embodiment of the present invention does not need to obtain different subcarrier bandwidths by changing the system sampling rate, and the subcarrier bandwidth is variable, thereby being effective.
  • Improve the utilization of spectrum resources At least two regions, and setting different subcarrier bandwidths for each region according to the channel information, and carrying data to be transmitted through the subcarriers, so that the subcarrier bandwidth is variable, thereby effectively improving the effective symbol time and the CP.
  • the ratio in order to achieve the purpose of improving the utilization of spectrum resources.
  • the embodiment of the present invention sets different CP lengths for each region according to the maximum multipath delay of the channel state, the utilization of the spectrum efficiency can be further improved.
  • the flexible combination of the regions may result in inconsistent total time lengths of the OFDM symbols.
  • the embodiment of the present invention may extend the CP of the OFDM symbol where important transmission data (for example, broadcast control data) is located, thereby obtaining More reliable transmission performance.
  • Orthogonal frequency division multiplexing based transmission method and device and frame knot provided by the embodiment of the present invention
  • the implementation method and the transmitter of the architecture are described in detail.
  • the principles and implementation manners of the present invention are described in the following.
  • the description of the above embodiments is only used to help understand the method and the idea of the present invention.
  • the details of the present invention and the scope of the application are subject to change without departing from the scope of the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Procédé de transmission basé sur un multiplexage par répartition orthogonale de la fréquence, qui consiste: à subdiviser les données de transmission de la trame en au moins deux domaines de durée variable; à obtenir des informations sur le canal et le trafic; à fixer une largeur de bande de sous-porteuse différente pour chaque domaine en fonction desdites informations sur le canal; à distribuer ladite sous-porteuse en fonction des informations sur le canal et le trafic, à obtenir la durée de chaque domaine en fonction du résultats de la distribution; à répartir les données dans les domaines correspondant à la durée et à les transmettre. L'invention concerne un procédé de transmission, un dispositif de transmission basé sur un multiplexage par répartition orthogonale de la fréquence et un émetteur pour mise en oeuvre d'une structure de trame.
PCT/CN2008/071184 2007-06-26 2008-06-04 Procédé de transmission et dispositif basé sur un multiplexage par répartition orthogonale de la fréquence (ofdm) Ceased WO2009000185A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2007101124482A CN101335731B (zh) 2007-06-26 2007-06-26 基于正交频分复用的传输方法及装置
CN200710112448.2 2007-06-26

Publications (1)

Publication Number Publication Date
WO2009000185A1 true WO2009000185A1 (fr) 2008-12-31

Family

ID=40185190

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2008/071184 Ceased WO2009000185A1 (fr) 2007-06-26 2008-06-04 Procédé de transmission et dispositif basé sur un multiplexage par répartition orthogonale de la fréquence (ofdm)

Country Status (2)

Country Link
CN (1) CN101335731B (fr)
WO (1) WO2009000185A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016022287A1 (fr) * 2014-08-07 2016-02-11 Coherent Logix, Incorporated Trames radio à partitions multiples
EP3308581A4 (fr) * 2015-08-26 2018-06-27 Huawei Technologies Co., Ltd. Structure de trame pour communications de type machine avec largeur de bande d'impulsion réglable
US10205619B2 (en) 2014-08-07 2019-02-12 ONE Media, LLC Dynamic configuration of a flexible orthogonal frequency division multiplexing PHY transport data frame

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102244558B (zh) * 2010-05-12 2014-09-03 华为技术有限公司 发送数据的方法及装置
CN102547992B (zh) * 2012-01-16 2015-01-14 清华大学 基于正交频分多址接入系统的信令数据混合传输方法
CN102868514B (zh) * 2012-08-30 2015-09-16 北京久华信信息技术有限公司 一种时分双工通信系统无线传输方法
CN103701747B (zh) * 2013-12-20 2017-02-01 西南交通大学 Ofdm系统在非完备信道信息下的子载波带宽、调制方式和功率分配的移动自适应方法
WO2016068072A1 (fr) * 2014-10-31 2016-05-06 三菱電機株式会社 Système de communications
US9985760B2 (en) * 2015-03-31 2018-05-29 Huawei Technologies Co., Ltd. System and method for an adaptive frame structure with filtered OFDM
US11050503B2 (en) * 2015-03-31 2021-06-29 Huawei Technologies Co., Ltd. System and method of waveform design for operation bandwidth extension
WO2018119749A1 (fr) * 2016-12-28 2018-07-05 Mediatek Singapore Pte. Ltd. Procédés permettant de prendre en charge une transmission ul sur de multiples numérologies dans un système nr
CN106992848A (zh) * 2017-05-26 2017-07-28 电子科技大学 一种用于索引调制的子载波分配方法
CN107135059A (zh) * 2017-05-26 2017-09-05 电子科技大学 一种用于索引调制的子载波分配方法
CN108134660B (zh) * 2017-12-19 2021-04-09 新疆石油管理局数据公司 一种油井数据处理方法及周期设置方法和设备
CN112839000A (zh) * 2020-12-30 2021-05-25 北京神经元网络技术有限公司 符号带宽可变的高速工业总线系统及符号带宽的改变方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1588937A (zh) * 2004-08-26 2005-03-02 浙江大学 具有可变子载波数目的自适应正交频分复用传输方法和系统
WO2005104582A1 (fr) * 2004-04-23 2005-11-03 Siemens Aktiengesellschaft Selection de configuration de mode de codec dans le cas d'operations sans transcodeur
WO2005104589A1 (fr) * 2004-04-23 2005-11-03 Electronics And Telecommunications Research Institute Emetteur et recepteur pour un systeme a ondes porteuses multiples, et procede d'attribution de sous-porteuse correspondant
WO2005125139A1 (fr) * 2004-06-16 2005-12-29 Samsung Electronics Co., Ltd. Procede pour transmettre et recevoir des donnees dans des systemes de communications mobiles en utilisant un schema ofdma
CN1894868A (zh) * 2003-04-16 2007-01-10 西门子公司 用于在多载波系统中通过多个发射天线传输数据的方法和发射机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1894868A (zh) * 2003-04-16 2007-01-10 西门子公司 用于在多载波系统中通过多个发射天线传输数据的方法和发射机
WO2005104582A1 (fr) * 2004-04-23 2005-11-03 Siemens Aktiengesellschaft Selection de configuration de mode de codec dans le cas d'operations sans transcodeur
WO2005104589A1 (fr) * 2004-04-23 2005-11-03 Electronics And Telecommunications Research Institute Emetteur et recepteur pour un systeme a ondes porteuses multiples, et procede d'attribution de sous-porteuse correspondant
WO2005125139A1 (fr) * 2004-06-16 2005-12-29 Samsung Electronics Co., Ltd. Procede pour transmettre et recevoir des donnees dans des systemes de communications mobiles en utilisant un schema ofdma
CN1588937A (zh) * 2004-08-26 2005-03-02 浙江大学 具有可变子载波数目的自适应正交频分复用传输方法和系统

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11082277B2 (en) 2014-08-07 2021-08-03 Coherent Logix, Incorporated Multi-portion radio transmissions
JP2020114017A (ja) * 2014-08-07 2020-07-27 コーヒレント・ロジックス・インコーポレーテッド マルチパーティションラジオフレーム
CN107431583A (zh) * 2014-08-07 2017-12-01 相干逻辑公司 多分区无线电帧
JP2018503990A (ja) * 2014-08-07 2018-02-08 コーヒレント・ロジックス・インコーポレーテッド マルチパーティションラジオフレーム
US11855915B2 (en) 2014-08-07 2023-12-26 ONE Media, LLC Dynamic configuration of a flexible orthogonal frequency division multiplexing PHY transport data frame
US10033566B2 (en) 2014-08-07 2018-07-24 Coherent Logix, Incorporated Multi-portion radio transmissions
US10205619B2 (en) 2014-08-07 2019-02-12 ONE Media, LLC Dynamic configuration of a flexible orthogonal frequency division multiplexing PHY transport data frame
US10389569B2 (en) 2014-08-07 2019-08-20 Coherent Logix, Incorporated Multi-partition radio frames
US9438459B2 (en) 2014-08-07 2016-09-06 Coherent Logix, Incorporated Multi-partition radio frames
US10560299B2 (en) 2014-08-07 2020-02-11 Coherent Logix, Incorporated Multi-portion radio transmissions
US10574500B2 (en) 2014-08-07 2020-02-25 ONE Media, LLC Dynamic configuration of a flexible orthogonal frequency division multiplexing PHY transport data frame
CN111628854A (zh) * 2014-08-07 2020-09-04 相干逻辑公司 多分区无线电帧
WO2016022287A1 (fr) * 2014-08-07 2016-02-11 Coherent Logix, Incorporated Trames radio à partitions multiples
US11838224B2 (en) 2014-08-07 2023-12-05 One Media , Llc Multi-portion radio transmissions
US11146437B2 (en) 2014-08-07 2021-10-12 ONE Media, LLC Dynamic configuration of a flexible orthogonal frequency division multiplexing PHY transport data frame
US11588591B2 (en) 2014-08-07 2023-02-21 Sinclair Television Group, Inc Multi-portion radio transmissions
US11096028B2 (en) 2015-08-26 2021-08-17 Huawei Technologies Co., Ltd. Frame structure for machine-type communications with adjustable pulse bandwidth
EP3308581A4 (fr) * 2015-08-26 2018-06-27 Huawei Technologies Co., Ltd. Structure de trame pour communications de type machine avec largeur de bande d'impulsion réglable

Also Published As

Publication number Publication date
CN101335731B (zh) 2012-08-08
CN101335731A (zh) 2008-12-31

Similar Documents

Publication Publication Date Title
CN101335731B (zh) 基于正交频分复用的传输方法及装置
EP2764745B1 (fr) Procédé et appareil pour fonctionnement à bandes multiples et à cellules multiples
CN101904125B (zh) 用于通信系统的灵活的ofdm/ofdma帧结构
CA2770993C (fr) Procede et appareil d'allocation d'une ressource de canal de commande d'un nžud de relais dans une sous-trame de liaison de raccordement
US8290067B2 (en) Spectrum sharing in a wireless communication network
US8520606B2 (en) Synchronous spectrum sharing based on OFDM/OFDMA signaling
US10602392B2 (en) Wireless communication method and wireless communication apparatus
KR101818584B1 (ko) 전용 기준 신호를 위한 공통 제어 채널 자원 할당 방법 및 장치
KR101599844B1 (ko) 다중접속영역 다중화 방법
JP2011524702A (ja) キャリアアグリゲーション
EP2436131A2 (fr) Transmission de signal avec un espacement de sous-porteuses défini dans des systèmes de communication ofdma
RU2479928C2 (ru) Устройство и способ передачи данных в системе беспроводной связи
WO2010139155A1 (fr) Procédé de structure et de configuration de trame et procédé de communication associé
EP2288216A1 (fr) Procédé et appareil pour affecter une ressource de canal de contrôle d'un nýud de relais dans une sous-trame de retour
CN106507367A (zh) 一种窄带正交频分复用信号的传输方法及装置
KR101412328B1 (ko) 효율적인 부반송파 맵핑을 이용한 데이터 전송방법
CN101599935A (zh) 正交频分复用系统的载波分配方法、装置和系统

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08757595

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08757595

Country of ref document: EP

Kind code of ref document: A1