WO2011140938A1 - 协作通信系统中的数据传输方法、发射端及接收端 - Google Patents

协作通信系统中的数据传输方法、发射端及接收端 Download PDF

Info

Publication number
WO2011140938A1
WO2011140938A1 PCT/CN2011/073590 CN2011073590W WO2011140938A1 WO 2011140938 A1 WO2011140938 A1 WO 2011140938A1 CN 2011073590 W CN2011073590 W CN 2011073590W WO 2011140938 A1 WO2011140938 A1 WO 2011140938A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
transmitting end
precoding
coded
matrix
Prior art date
Application number
PCT/CN2011/073590
Other languages
English (en)
French (fr)
Inventor
余荣道
招溢利
刘坚能
黄煌
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP11780159.7A priority Critical patent/EP2602944B1/en
Publication of WO2011140938A1 publication Critical patent/WO2011140938A1/zh
Priority to US13/760,912 priority patent/US8731095B2/en

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • H04B7/0456Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022Site diversity; Macro-diversity
    • H04B7/024Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J11/00Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023Interference mitigation or co-ordination
    • H04J11/0026Interference mitigation or co-ordination of multi-user interference
    • H04J11/003Interference mitigation or co-ordination of multi-user interference at the transmitter
    • H04J11/0033Interference mitigation or co-ordination of multi-user interference at the transmitter by pre-cancellation of known interference, e.g. using a matched filter, dirty paper coder or Thomlinson-Harashima precoder

Definitions

  • the embodiments of the present invention relate to the field of communications technologies, and in particular, to a data transmission method, a transmitting end, and a receiving end in a cooperative communication system. Background technique
  • Multiple Input Multiple Out
  • FIG. 1 is a schematic diagram of data transmission in the prior art, which includes transmitters S1 and S2, and receivers D1 and D2.
  • the transmitting end S1 and the receiving end D1 are a pair, that is, the transmitting end S1 sends data to the receiving end D1;
  • the transmitting end S2 and the receiving end D2 are a pair, that is, the transmitting end S2 sends data to the receiving end D2.
  • the transmitting end SI encodes the data and sends it to the receiving end D1, and the receiving end D2 can also receive the data.
  • the transmitting end S2 encodes the data x 2 and sends it to the receiving end D2, and the receiving end D1 can also receive the data ⁇ 2 .
  • the data transmission method of the prior art has the following problems: The receiving end D2 can receive the data, but the data is not sent to the receiving end D2, so the data sent by the transmitting end S1 is on the receiving end.
  • the embodiment of the invention provides a data transmission method, a transmitting end and a receiving end in a cooperative communication system, which are used to solve the interference problem during data transmission in the existing MIMO system.
  • the embodiment of the present invention provides a data transmission method in a cooperative communication system, including: the first transmitting end pre-codes the load data of the first pre-coding matrix to obtain the first pre-encoded data;
  • the first transmitting end pre-codes the cooperative data by using the second pre-coding matrix to obtain the second pre-coded data to cancel the interference of the data sent by the other transmitting end on the receiving end of the first pre-coded data, where the cooperation is performed.
  • the data includes at least a portion of the load data sent by the other transmitting end received by the first transmitting end;
  • the first transmitting end sends the pre-coded first pre-coded data and second pre-coded data to the receiving end.
  • the embodiment of the present invention further provides a data transmission method in a cooperative communication system, including: receiving, by a receiving end, data sent by a first transmitting end, where data sent by the first transmitting end includes first, according to a first precoding matrix The first precoding data obtained by precoding the payload data of the transmitting end and the second precoding data obtained by precoding the cooperative data according to the second precoding matrix; the second precoding data is used to cancel the data sent by another transmitting end Interference with the first pre-coded data at the receiving end, the cooperation data including at least a part of load data sent by the other transmitting end received by the first transmitting end.
  • the embodiment of the present invention further provides a transmitting end in a cooperative communication system, including:
  • a first pre-encoding module configured to pre-code the load data of the first pre-encoding matrix to obtain the first pre-encoded data
  • a second precoding module configured to perform precoding on the cooperation data by using the second precoding matrix, to obtain second precoding data, to cancel interference of the data sent by another transmitting end on the receiving end of the first precoding data, where
  • the cooperation data includes at least a part of load data sent by the other transmitting end received by the first transmitting end;
  • a sending module configured to send the pre-coded first pre-coded data and second pre-coded data to the receiving end.
  • the embodiment of the invention further provides a receiving end in a cooperative communication system
  • a receiving module configured to receive data sent by the first transmitting end, where the data sent by the first transmitting end includes first precoding data obtained by precoding the load data of the first transmitting end according to the first precoding matrix, and according to the first The second pre-coded data obtained by pre-coding the cooperative data by the second pre-coding matrix; the second pre-coded data is used to cancel the interference of the data sent by the other transmitting end on the receiving end of the first pre-coded data, the collaborative data Included at least a portion of the load data transmitted by the other transmitting end received by the first transmitting end.
  • the data transmission method, the transmitting end and the receiving end in the cooperative communication system provided by the embodiment of the present invention when precoding, the first transmitting end encodes the load data of the first precoding matrix to obtain the first pre-encoded data; ⁇ precoding the cooperative data with the second precoding matrix to obtain a second precoding matrix, and using the different precoding matrix to eliminate the interference of the data sent by the other transmitting end on the receiving end of the first precoding data, The interference problem in data transmission in the prior art.
  • FIG. 2 is a flowchart of Embodiment 1 of a data transmission method in a cooperative communication system according to the present invention
  • FIG. 3 is a schematic diagram showing a data transmission method in a cooperative communication system according to the present invention
  • FIG. 5 is a schematic structural diagram of an embodiment of a transmitting end in a cooperative communication system according to the present invention
  • FIG. 6 is a schematic structural diagram of an embodiment of a receiving end in a cooperative communication system according to the present invention.
  • FIG. 2 is a flowchart of Embodiment 1 of a data transmission method in a cooperative communication system according to the present invention, including:
  • Step 101 The first transmitting end pre-codes the load data of the first pre-coding matrix to obtain the first pre-encoded data.
  • Step 102 The first transmitting end pre-codes the cooperative data by using the second pre-coding matrix to obtain second pre-coded data, so as to cancel interference of the data sent by the other transmitting end on the receiving end of the first pre-coded data, where the collaboration data includes At least a portion of the load data transmitted by the other transmitting end received by the first transmitting end.
  • the cooperation data refers to data for mutual anti-interference transmitted by each transmitting end.
  • Load data refers to data that a sender actually needs to send to the receiver.
  • the payload data includes its own collaboration data and its own private data.
  • the collaborative data may be a subset of the payload data at the transmitting end, i.e., the collaborative data may include a portion of the payload data at the transmitting end.
  • the collaborative data can be obtained by randomly selecting or arbitrarily selecting the load data at the transmitting end. For each transmitting end, the amount of collaborative data can be one-half of the load data.
  • Step 103 The first transmitting end sends the pre-coded first pre-coded data and the second pre-coded data to the receiving end.
  • the product of the second precoding matrix and the transmission matrix of the first transmitting end may be zero.
  • the transmission matrix is a transmission matrix between the first transmitting end and its target receiving end.
  • the product of the second precoding matrix and the transmission matrix mentioned herein is 0.
  • the product of the second precoding matrix and the transmission matrix can be made close to 0 or as small as possible if the system allows. .
  • FIG. 3 is a schematic diagram of a data transmission method in a cooperative communication system according to the present invention.
  • the system is a two-user MIMO system, including a transmitting end S1, a transmitting end S2, a receiving end D1, and a receiving end D2.
  • the transmitting end SI and the receiving end D1 form a pair, that is, the receiving end D1 is the target receiving end of the transmitting end S1; the transmitting end S2 and the receiving end D2 form a pair, that is, the receiving end D2 is the target receiving end of the transmitting end S2.
  • Individual launch - - The number of antennas at both the terminal and the receiver is M.
  • the data of the transmitting end S1 is , expressed by the following matrix:
  • the data sent by the transmitter includes multiple symbols, such as TQ+L in equation (1).
  • X;, xf e , and so on. 7 is the number of symbol slots, and the number of cooperative data transmitted between the transmitters at each symbol is ⁇ , that is, the number of data symbols (collaboration data) received by the other transmitter at each symbol slot.
  • the pre-coded data (ie, the first pre-coded data) is carried out by its own load data.
  • A k e+1 ... ⁇ , [ ⁇ ]' denotes the transposition operation, that is, the private data of the transmitting end S1
  • p 2 c x [x ... xf4, that is, Cl as the cooperative data of the transmitting end SI.
  • Definition ⁇ ] [( )' ( ' ⁇ denotes transmission from the transmitting end S1 in the tth symbol slot
  • denotes Q cooperative symbols transmitted from the transmitting end SI to the receiving end D1 in the t-th symbol slot.
  • XiW there are a total of ⁇ + ⁇ symbols, and the data of the transmitting end S2 is ⁇ 7 , and ⁇ 7 is represented by the following matrix: - -
  • the cooperative data sent by the transmitting end S1 is a subset of the load data of the transmitting end S2, and the cooperative data c x sent by the transmitting end S2 is the load of the transmitting end S1.
  • the transmitting end S1 transmits the cooperative data C1 to the transmitting end S2, and the transmitting end S2 transmits the cooperative data c 2 to the transmitting end S1.
  • the transmitting end SI pre-codes the load data and the cooperation data received from other transmitting ends, respectively.
  • the formula for precoding is as follows: - -
  • ⁇ [t] represents the data pre-coded for the data of the t-th symbol slot.
  • v f tQ
  • V 12 12 is a precoding matrix of the cooperative data, and is a precoding element of the cooperative symbol x 2 in the cooperative data transmitted by the transmitting end S2.
  • the transmitting end S2 pre-codes the load data and the cooperative data received from other transmitting ends, respectively.
  • the formula for precoding is as follows:
  • the data indicating that the data precoded for the tth symbol slot is the precoding matrix of the private data p 2 of the tth symbol slot, the precoding element of the private symbol X 2 TQ+tl , [v vf, I ⁇ Collaboration data ⁇ precoding matrix, tl
  • v 2 ' l is a precoding element v 2 of the cooperative symbol u in the cooperation data ⁇ at the transmitting end S2 is a precoding matrix of the cooperative data by the transmitting end S2, and is a precoding element of the cooperative symbol in the cooperative data, - - Sent to the receiving end.
  • the second embodiment of the data transmission method in the cooperative communication system of the present invention includes: receiving, by the receiving end, data sent by the first transmitting end, where the data sent by the first transmitting end comprises precoding the load data of the first transmitting end according to the first precoding matrix. Obtaining first pre-encoded data and second pre-encoded data obtained by pre-coding the cooperative data according to the second pre-encoding matrix; the second pre-encoded data is used to cancel data transmitted by another transmitting end to the first pre-encoded data The interference at the receiving end, the cooperation data is the load data sent by another transmitting end received by the first transmitting end.
  • the receiving end can receive 3 ⁇ 4+ ( ⁇ ) in T symbol slots.
  • the method further includes: concatenating the received data of the symbol slots and concatenating the channel matrices corresponding to the slots, and processing the received data according to the UI receiving algorithm.
  • the specific ⁇ receiving algorithm may include a Zero-forcing (ZF) method, a Minimum Mean Square Error (MMSE) method, a Maximum Likelihood (ML) method, and a continuous interference cancellation (Successive). Interference Cancellation, referred to as SIC) method.
  • ZF Zero-forcing
  • MMSE Minimum Mean Square Error
  • ML Maximum Likelihood
  • SIC continuous interference cancellation
  • the transmission matrix between each transmitting end and each receiving end includes Hvisor, H n , H 21 and H 22 , and the transmitting end SI transmits data to the receiving end D1 based on the first transmission matrix H strictly, and the transmitting end S2 is based on
  • the second transmission matrix H 12 transmits data to the receiving end D1
  • the transmitting end S1 transmits data to the receiving end D2 based on the third transmission matrix H 21
  • the transmitting end S2 transmits data to the receiving end D2 based on the fourth transmission matrix H 22 .
  • the data can be as shown in equation (5), and the value of ⁇ can be 1 or 2, which indicates the data received by the receiver D1 and the data received by the receiver D2:
  • the payload data is the payload data
  • the interfence is the interference term
  • the other identical parameter symbols characterize the same physical meaning as described above.
  • the receiver receives a total of 2 + 0 data streams, and the receiver cannot resolve in a single symbol slot, so the receiver D k (the value of k is 1 or 2) will be consecutive T Symbols received in symbol slots are combined and processed together
  • the first transmitting end when precoding, encodes the load data of each transmitting end by using the first precoding matrix, and uses the second precoding matrix code to transmit from the other transmitting end.
  • the cooperation data received by the terminal, the product of the second precoding matrix and the transmission matrix between the first transmitting end and the first receiving end may be 0, and then the pre-encoded load data and the cooperative data are transmitted based on the transmission matrix.
  • the data received by the first receiving end based on the transmission matrix does not include the cooperation data, that is, the first receiving end does not receive a part of the load data sent by other transmitting ends, Thereby it is possible to reduce interference between the respective transmitting ends.
  • a two-user MIMO system involved in the embodiment of the present invention includes a transmitting end S1, a transmitting end S2, a receiving end D1, and a receiving end D2, and each transmitting end and receiving end includes two antennas.
  • the system is a 22 MIMO system.
  • the data sent by the transmitting end S1 is, and its expression is as follows:
  • the target data sent by the transmitting end S2 is x 7 , and its expression is as follows:
  • the private data of the transmitting end S1 is xf.
  • the number of antennas M is 2, the total number of symbol slots is 2, and the number of coordinated symbols Q exchanged in each symbol slot is 1, and every 7 symbol slots are used.
  • ⁇ indicates the transmitting end k private data
  • Precoding matrix x; is a transmitting terminal SI is a precoding matrix of the transmitting end collaboration data s k collaborative data transmitter performs precoding S1
  • S2 2 is a transmission side is transmitting end precoding matrix S k of the collaboration data transmitting end the collaboration data S2 precode
  • A-x 2 private data S k private data precoding matrix x ⁇ is the transmitter is the transmitter
  • the cooperative data s k of S1 pre-predicts the cooperation data of the transmitting end S1 - -
  • the data received by the receiving end D k is:
  • y 2 [1] H 2l w[x ⁇ + / 1 v 1 xj +H 22 w 2 X2 + / 2 +z[l] .
  • ⁇ ; and ⁇ 2 are precoding symbols of the private symbols in the private data of the transmitting end SI
  • ⁇ and w are precoding symbols of the private symbols in the private data of the transmitting end S2
  • 2 is the transmitting end S1
  • the data received by the receiving end D1 in two consecutive symbol slots is:
  • FIG. 5 is a schematic structural diagram of an embodiment of a transmitting end in a cooperative communication system according to the present invention.
  • the transmitting end 10 includes a first pre-encoding module 11, a second pre-encoding module 12, and a transmitting module 13.
  • the first pre-encoding module 11 is configured to pre-code the load data of the first pre-encoding matrix to obtain the first pre-encoded data.
  • the second pre-encoding module 12 is configured to pre-code the cooperation data by using the second pre-coding matrix to obtain the second pre-coding data to cancel the interference of the data sent by the other transmitting end on the receiving end of the first pre-encoded data.
  • the collaboration data includes at least a portion of load data transmitted by another transmitter received by the first transmitting end.
  • the sending module 13 is connected to the first pre-encoding module 11 and the second pre-encoding module 12, and is configured to send the pre-coded first pre-encoded data and the second pre-encoded data to the receiving end.
  • the transmitting module 13 can be specifically configured to send - 0) data symbols to the receiving end in T symbol slots.
  • the second precoding module 12 may be specifically configured to precode the cooperative data by using a second precoding matrix with a transmission matrix product of 0 at the transmitting end.
  • FIG. 6 is a schematic structural diagram of an embodiment of a receiving end in a cooperative communication system according to the present invention.
  • the receiving end 20 includes a receiving module 21, and the receiving module 21 is configured to receive data sent by a first transmitting end, where the first transmitting end sends
  • the data includes load data after precoding with the first precoding matrix and second precoding data obtained by precoding the cooperative data with the second precoding matrix.
  • the cooperation data includes at least a portion of the second precoding data of the payload data transmitted by the other transmitting end received by the first transmitting end to cancel interference of the data transmitted by the other transmitting end with the first precoding data at the receiving end.
  • the product of the second precoding matrix and the transmission matrix is 0, the transmission matrix is a transmission matrix between the first transmitting end and the first receiving end, and the first receiving end is a target receiving end of the first transmitting end.
  • the receiving module 21 can be specifically configured to receive TQ + T (M ⁇ Q) numbers in one symbol slot.
  • the receiving end shown in FIG. 6 may further include a processing module 22, which is connected to the receiving module 21, and the processing module 22 is specifically configured to cascade the received data of the T symbol slots and each time The channel matrices corresponding to the slots are cascaded, and then the received data is processed according to a MIMO receiving algorithm.
  • a processing module 22 which is connected to the receiving module 21, and the processing module 22 is specifically configured to cascade the received data of the T symbol slots and each time
  • the channel matrices corresponding to the slots are cascaded, and then the received data is processed according to a MIMO receiving algorithm.
  • the ZF method, the MMSE method, the ML method, and the SIC method can be used.
  • each module in the receiving end as shown in FIG. 6 can be referred to the description of the foregoing method embodiment.
  • the transmitting end and the receiving end provided by the embodiments of the present invention may be each device in a system for performing data transmission based on MIMO technology.
  • UE User Equipment
  • the base station transmits data based on the MIMO method, and the transmitting end may be a UE, and the receiving end may be a base station.
  • the transmitting end may be a base station, and the receiving end may be a UE.
  • the precoding module uses the first precoding matrix to encode the load data of each transmitting end, and uses the second precoding matrix code to receive the received data from other transmitting ends.
  • the transmitting module transmits the pre-encoded load data and the collaborative data based on the transmission matrix. Since the product of the second precoding matrix and the transmission matrix is 0, the data received by the receiving end based on the transmission matrix does not include the cooperative data, that is, the receiving end does not receive a part of the load data sent by other transmitting ends, thereby being able to reduce Interference between the various transmitters.

Landscapes

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

Description

一 一 协作通信系统中的数据传输方法、 发射端及接收端 技术领域
本发明实施例涉及通信技术领域, 尤其涉及一种协作通信系统中的数据 传输方法、 发射端及接收端。 背景技术
多输入多输出 ( Multiple Input Multiple Out , 简称 ΜΙΜΟ )是第四代通信 ( 4G ) 中的关键技术。
在 ΜΙΜΟ系统中, 多个发射端和接收端对可以利用相同的无线资源传输 数据。 如图 1所示为现有技术中数据传输的示意图, 该系统中包括发射端 S1 和 S2, 以及接收端 D1和 D2。 发射端 S1和接收端 D1是一对, 即, 发射端 S1发送数据给接收端 D1 ; 发射端 S2和接收端 D2是一对, 即发射端 S2发送 数据给接收端 D2。 发射端 SI把数据 编码后发送给接收端 D1 , 同时接收端 D2也能接收到数据 。 发射端 S2把数据 x2编码后发送给接收端 D2, 同时接 收端 D1也能接收到数据 χ2。 现有技术的数据传输方法存在如下的问题: 接收端 D2能够收到数据 , 但是数据 并不是发送给接收端 D2, 这样发射端 S1发送的数据就对接收端
D2造成了干扰。 类似地, 发射端 S1发送的数据也会对接收端 D1造成干扰。 也就是说, 在现有的 MIMO系统中, 发射端之间发送的数据会对彼此造成干 扰。 发明内容 - - 本发明实施例提供一种协作通信系统中的数据传输方法、 发射端及接收 端, 用以解决现有的 MIMO系统中数据传输时的干扰问题。
本发明实施例提供了一种协作通信系统中的数据传输方法, 包括: 第一发射端利用第一预编码矩阵对自身的负载数据进行预编码, 获得第 一预编码数据;
所述第一发射端利用第二预编码矩阵对协作数据进行预编码, 获得第二 预编码数据以消除另一发射端发送的数据对所述第一预编码数据在接收端的 干扰, 所述协作数据包括所述第一发射端接收到的所述另一发射端发送的负 载数据的至少一部分;
所述第一发射端向所述接收端发送所述预编码后的所述第一预编码数据 及第二预编码数据。
本发明实施例还提供了一种协作通信系统中的数据传输方法, 包括: 接收端接收第一发射端发送的数据, 所述第一发射端发送的数据包括根 据第一预编码矩阵对第一发射端的负载数据进行预编码获得的第一预编码数 据和根据第二预编码矩阵对协作数据进行预编码获得的第二预编码数据; 第 二预编码数据用以消除另一发射端发送的数据对所述第一预编码数据在接收 端的干扰, 所述协作数据包括所述第一发射端接收到的所述另一发射端发送 的负载数据的至少一部分。
本发明实施例还提供了一种协作通信系统中的发射端, 包括:
第一预编码模块, 用于利用第一预编码矩阵对自身的负载数据进行预编 码, 获得第一预编码数据;
第二预编码模块, 用于利用第二预编码矩阵对协作数据进行预编码, 获 得第二预编码数据以消除另一发射端发送的数据对所述第一预编码数据在接 收端的干扰, 所述协作数据包括所述第一发射端接收到的所述另一发射端发 送的负载数据的至少一部分; - - 发送模块, 用于向所述接收端发送所述预编码后的所述第一预编码数据 及第二预编码数据。
本发明实施例还提供了一种协作通信系统中的接收端,
包括:
接收模块, 用于接收第一发射端发送的数据, 所述第一发射端发送的数 据包括根据第一预编码矩阵对第一发射端的负载数据进行预编码获得的第一 预编码数据和根据第二预编码矩阵对协作数据进行预编码获得的第二预编码 数据; 第二预编码数据用以消除另一发射端发送的数据对所述第一预编码数 据在接收端的干扰, 所述协作数据包括所述第一发射端接收到的所述另一发 射端发送的负载数据的至少一部分。
本发明实施例提供的协作通信系统中的数据传输方法、 发射端及接收端, 在预编码时, 第一发射端釆用第一预编码矩阵编码自身的负载数据, 得到第 一预编码数据; 釆用第二预编码矩阵对协作数据进行预编码, 获得第二预编 码矩阵, 通过使用不同的预编码矩阵消除另一发射端发送的数据对所述第一 预编码数据在接收端的干扰, 解决了现有技术中数据传输时的干扰问题。 附图说明
图 1所示为现有技术中数据传输的示意图;
图 2所示为本发明协作通信系统中的数据传输方法实施例一的流程图; 图 3所示为本发明协作通信系统中的数据传输方法的示意图;
图 4所示为本发明实施例中涉及到的一个两用户的 MIMO系统;
图 5所示为本发明协作通信系统中的发射端实施例的结构示意图; 图 6所示为本发明协作通信系统中的接收端实施例的结构示意图。 具体实施方式 ~ ~ 如图 2所示为本发明协作通信系统中的数据传输方法实施例一的流程图, 包括:
步骤 101、 第一发射端利用第一预编码矩阵对自身的负载数据进行预编 码, 获得第一预编码数据。
步骤 102、 第一发射端利用第二预编码矩阵对协作数据进行预编码, 获得 第二预编码数据, 以消除另一发射端发送的数据对第一预编码数据在接收端 的干扰, 协作数据包括第一发射端接收到的另一发射端发送的负载数据的至 少一部分。
在本发明的实施例中, 协作数据是指各个发送端互相发送的用于抗干扰 的数据。 负载数据是指一个发送端实际需要发送给接收端的数据, 负载数据 包括自身的协作数据和自身的私有数据。
协作数据可以是发射端的负载数据的子集, 即协作数据可以包括发射端 的负载数据的一部分。 该协作数据可以通过在发射端的负载数据中随机选择 或者任意选择而得到, 对每一个发射端而言, 协作数据数量可以是负载数据 的二分之一。
步骤 103、 第一发射端向接收端发送预编码后第一预编码数据及第二预编 码数据。
步骤 102中, 第二预编码矩阵和第一发射端的传输矩阵的乘积可以是 0。 传输矩阵为第一发射端与其目标接收端之间的传输矩阵。 当然这里所说的第 二预编码矩阵和传输矩阵的乘积是 0为最优情况, 实际中, 可以使得第二预编 码矩阵和传输矩阵的乘积接近 0或在系统允许的情况下尽可能的小。
如图 3所示为本发明协作通信系统中的数据传输方法的示意图, 该系统 是一个二用户 MIMO系统, 包括发射端 Sl、发射端 S2、接收端 Dl和接收端 D2。 发射端 SI和接收端 Dl组成一对, 即接收端 D1是发射端 S1的目标接收端; 发射 端 S2和接收端 D2组成一对, 即接收端 D2是发射端 S2的目标接收端。 各个发射 - - 端和接收端的天线数均为 M。
发射端 S1的数据为 , 用如下矩阵表示:
Figure imgf000007_0001
发射端发送的数据中包括多个符号,如公式( 1 )中的 TQ+L
X;、 xfe、 等。 其中, 7为符号时隙的个数, 每个符号时发射端之间发送的协作数据个数 为 ρ, 即每个符号时隙所接收另一发射端的数据符号个数(协作数据)。 7个 符号时隙内发射端总共向接收端传输 J = ¾ + 2- 个符号, 其中 TQ对应对 协作数据进行预编码后的数据(即上述的第二预编码数据), (Μ_ 对应对
2
自身的负载数据进行预编码后的数据(即第一预编码数据) 。 公式(1) 中, 令 A =ke+1 ... ί, [·]'表示转置运算, 即将 Α作为发射 端 S1的私有数据, 发射端 S 1的私有数据包括 J p = (M _ 个符号。 令 p 2 cx = [x … xf4, 即将 Cl作为发射端 SI的协作数据。 定义 ^] = [( )' ( 'ί表 示在第 t个符号时隙内从发射端 S1传输到接收端 D1的负载数据, te [1,···,Γ]。
νίβ
Figure imgf000007_0002
ί表示第 t个符号时隙内从发射端 SI传给接收端 D1的 Q个协作符 号。 在 XiW中共有 ρ+Ζ^ζ^个符号, 发射端 S2的数据为 χ7 , χ7用如下矩阵表示: - -
, 即将 p2作为发射端 S2的私有数据。 令 c =
Figure imgf000008_0001
为 发射 端 S2 的 协作 数据 。 定 义
•½W = [( 2 )' ^)'ί表示在第 t个符号时隙内从发射端 S2传输到接收端 D2 的负载数据。 = [xf- Q~l) ί表示第 t个符号时隙内从发射端 S2传给接收端 D2 的协作符号。 在 x2 [t]中共有 0 + Τ{Μ - Q)个符号。 本发明实施例中, 各个发射端发送的数据包括两部分, 一部分是负载数 据, 一部分是其他发射端的协作数据。 这些协作数据是其他发射端的负载数 据的子集, 例如发射端 S1发送的协作数据^就是发射端 S2的负载数据中的子 集, 发射端 S2发送的协作数据 cx就是发射端 S 1的负载数据的子集。 发射端 S1把协作数据 Cl发送给发射端 S2 , 发射端 S2把协作数据 c2发送给 发射端 Sl。
发射端 SI分别对负载数据和从其他发射端接收到的协作数据进行预编 码。 预编码的公式如下: - -
Figure imgf000009_0001
其中, ^[t] 表示对第 t个符号时隙的数据预编码后的数据。 W = ··· W j是第 t个符号时隙的私有数据 的预编码矩阵, 是第 /个 私有符号 xf ^的预编码元素; ; =^ ··· ]是协作数据 c(的预编码矩阵, 是发射端 S1 的协作数据 c( 中 的协作符号 的预编码元素。 vf = tQ
V 12 12 是协作数据 的预编码矩阵, 是发射端 S2发送的协作 数据 中的协作符号 x2的预编码元素。
发射端 S2分别对负载数据和从其他发射端接收到的协作数据进行预编 码。 预编码的公式如下:
Figure imgf000009_0002
表示对第 t个符号时隙的数据预编码后的数据 是第 t个符号时隙的私有数据 p2的预编码矩阵 , 私有符号 X2 TQ+tl的预编码元素, = [v vf, I疋协作数据<^的预编码矩阵, tl
v2'l是发射端 S2对协作数据 ^中的协作符号 u 的预编码元素 v2 … ]是发射端 S2对协作数据 的预编码矩阵, 是协作数据 中 的协作符号 的预编码元素, - - 发送给接收端了。
本发明协作通信系统中的数据传输方法实施例二包括: 接收端接收第一 发射端发送的数据, 第一发射端发送的数据包括根据第一预编码矩阵对第一 发射端的负载数据进行预编码获得的第一预编码数据和根据第二预编码矩阵 对协作数据进行预编码获得的第二预编码数据; 第二预编码数据用以消除另 一发射端发送的数据对第一预编码数据在接收端的干扰, 协作数据为第一发 射端接收到的另一发射端发送的负载数据。
具体地, 实施例二中, 接收端可以在 T个符号时隙, 接收 ¾+ )
2 数据符号。
在以上实施例的基础上,还可以包括将 Τ个符号时隙的接收到的数据进行 级联并将各时隙对应的信道矩阵级联,然后根据 ΜΙΜΟ接收算法处理接收到的 所述数据。
具体的 ΜΙΜΟ接收算法可以包括迫零(Zero-forcing, 简称 ZF ) 方法、 最 小均方误差 ( Minimum Mean Square Error简称 MMSE ) 方法、 最大似然 ( Maximum Likelihood,简称 ML )方法、连续干扰消除 ( Successive Interference Cancellation, 简称 SIC )方法等。
参见图 3 , 各个发射端和各个接收端之间的传输矩阵包括 H„、 Hn、 H21和 H22 , 发射端 SI基于第一传输矩阵 H„向接收端 D1发送数据, 发射端 S2基于第 二传输矩阵 H12向接收端 D1发送数据, 发射端 S1基于第三传输矩阵 H21向接收 端 D2发送数据, 发射端 S2基于第四传输矩阵 H22向接收端 D2发送数据。 接收端 D1在各个符号时隙中, 分别基于第一传输矩阵 H„接收发射端 S1 发送的数据, 基于第二传输矩阵 H12接收发射端 S2发送的数据。 接收端接收到 - - 的数据 可以如公式(5) 所示, Α的取值可以是 1或 2, 分别表示接收端 D1 接收到的数据和接收端 D2接收到的数据:
Figure imgf000011_0001
payload data int erference
公式 ( 5 ) 中, 是噪声, Hk =[Hkl Ht2]表示各个传输矩阵,
Figure imgf000011_0002
的 预 编 码 元 素 ,
V; = [ν/' … ]eC2Mx2是发射端 1 ( 1的取值可以是 1或 2) 的所有 Q个协作符 号的预编码矩阵。 payload data是负载数据, interfence是干扰项, 其他同样的 参数符号于前述表征同样的物理意义。
在本发明实施例中, 令 , V和 r满足如下条件(6) (7)和(8) :
Hkv = 0 , i≠k (6)
HtV'≠0, k (7 ) rank(H,V') = Q, Vk (8) - - 公式(8 ) 中, ra^ )表示矩阵的秩, W表示任意一个 i。 基于上述的条件, 公式(5 )可以演变成:
Figure imgf000012_0001
int
公式(5 )和(9 )相比较, 可以看出, 公式(9 ) 中干扰项减少了一项。 从公式( (9 ) 中可以看出, 接收端 i接收到发射端 k发送的协作数据后, 则发射端 k发送的协作数据就被消掉了。 也就是说, 接收端不会处理发射端 k 发送的协作数据, 这样就能减少发射端 k发送的数据会对接收端 i的干扰。
如公式(5 ) 所示, 接收端总共接收到 2 +0个数据流, 接收端在单个 符号时隙内无法解析, 所以接收端 Dk (k的取值是 1或 2)将连续 T个符号时隙内 接收到的符号联合起来一起处理
本发明实施例提供的协作通信系统中的数据传输方法, 在预编码时, 第 一发射端釆用第一预编码矩阵编码各个发射端的负载数据, 釆用第二预编码 矩阵编码从其他的发射端接收到的协作数据, 第二预编码矩阵与第一发射端 和第一接收端之间的传输矩阵的乘积可以是 0 , 然后基于传输矩阵将预编码后 的负载数据和协作数据发送出去。 由于第二预编码矩阵和传输矩阵的乘积是 0 , 第一接收端基于传输矩阵接收到的数据中不会包括协作数据, 即第一接收 端不会接收到其他发射端发送的一部分负载数据, 从而能够减小各个发射端 之间的干扰。
釆用本发明实施例提供的方法, MIMO系统的自由度(表征系统最大服用 的数据流数目 )可以为 ρ τ ^ =M + Q , 与现有技术中的 MIMO系统相比, 自由度增力口。
下面通过一个具体的例子来说明本发明 MIMO系统中的数据传输方法的 - - 实现过程。
如图 4所示为本发明实施例中涉及到的一个两用户的 MIMO系统, 包括发 射端 Sl、 发射端 S2、 接收端 Dl和接收端 D2, 各个发射端和接收端均包含 2个 天线, 该系统是一个 2 2的 MIMO系统。
发射端 S1发送的数据是 , 其表达式如下:
Figure imgf000013_0001
发射端 S2发送的目标数据是 x7, 其表达式如下:
X:
( 12)
X: 发射端 si的协作数据是 =1^
Figure imgf000013_0002
, 该协作数据 Cl需要发送给发射端
S2, 发射端 S1的私有数据是 xf。 发射端 S2的协作数据是 C2,c2 = χ2 2ί,该协 作数据 c2需要发送给发射端 S 1 , 发射端 S2的私有数据是 x2 3
该系统中, 天线数 M的取值为 2, 符号时隙的总数 7的取值为 2, 每个符 号时隙内交换的协作符号数 Q的取值为 1 , 每 7个符号时隙每个发射端传输的 符号数 J=r +=3, (Μ— d。 对于发射端 Sk (k取值为 1或 2, 分别表示发射端 SI和 S2) , Λ = χ表示发 射端 k的私有数据, c, = X, X, 表示发射端 Sk发送给其他发射端的协作数据, 在 第 t 个 符 号 时 隙 内 , 发 射 端 Sk 发 送 的 负 载 数 据 是 - -
X [t] = [(p (cl {1,2}。发射端 Sk发送的各种数据可以用如下
Figure imgf000014_0001
表格表示:
符号时隙 发送的符号 符号的含义 编码矩阵 t=l A为发射端 sk的 = 是发射端 私有数据 sk的私有数据的
Figure imgf000014_0002
预编码矩阵
Figure imgf000014_0003
=x;是发射端 SI 是发射端 的协作数据 sk对发射端 S1的 协作数据进行预 编码的预编码矩 阵
是发射端 S2 2 = 是发射端 的协作数据 Sk对发射端 S2的 协作数据进行预 编码的预编码矩 阵
t=2
~Pk~ ~ 为发射端 Sk21= 是发射端
¾[2]= -
A— x2 私有数据 Sk的私有数据的 预编码矩阵 =x\是发射端 是发射端
S1的协作数据 sk对发射端 S1的 协作数据进行预 - -
Figure imgf000015_0004
接收端 Dk接收到的数据为:
2 2 2 2
7=1 / j≠k =1 i≠k ^
payload data int erference
2 2 2 (13)
= Hkkwlxl+ JHkjvj t kxk t+ jHkjwj txk t+ jHkv1 txk t +z[t]
j=l j≠k i≠k
payload data int erference
从而, 得到如下的结果:
[1] =
Figure imgf000015_0001
payload data int erference + z[2];
Figure imgf000015_0002
y2 [1] = H2lw[x^ + /1v1 xj +H22w2X2 + /2 +z[l] .
payload data int erference y2 [2] = + z[2]。
Figure imgf000015_0003
- - 其中, ^;和^2是发射端 SI的私有数据中的私有符号的预编码符号, ^和 w是发射端 S2的私有数据中的私有符号的预编码符号, 和 2是发射端 S1 的协作数据中的符号的预编码符号, 和 2是发射端 S2的协作数据中的符号 的预编码符号, 是噪声, t=l、 2, H为对应的传输矩阵,并且 Ht = [Hkl Hk2 ] , v, = , 还应当满足下列条件:
Figure imgf000016_0001
HXV^ = 0 , Η,ν,'≠0 , rank{ y^ ) = 1;
H V = 0 , H2V^≠0 , rank(H2V ) = l o
连续两个符号时隙内接收端 D1接收到的数据是:
Figure imgf000016_0002
之后, 接收端 Dl可以釆用各种那个检测算法对接收到的数据进行处理。 如图 5所示为本发明协作通信系统中的发射端实施例的结构示意图, 该发 射端 10包括第一预编码模块 11、 第二预编码模块 12和发送模块 13。 第一预编 码模块 11用于利用第一预编码矩阵对自身的负载数据进行预编码, 获得第一 预编码数据。 第二预编码模块 12用于利用第二预编码矩阵对协作数据进行预 编码, 获得第二预编码数据以消除另一发射端发送的数据对第一预编码数据 在接收端的干扰。 该协作数据包括第一发射端接收到的另一发射端发送的负 载数据的至少一部分。 发送模块 13分别与第一预编码模块 11和第二预编码模 块 12连接, 用于向接收端发送预编码后的第一预编码数据及第二预编码数据。 — — 其中, 发送模块 13具体可以用于在 T个符号时隙, 向接收端发送 - 0)个数据符号。
2
第二预编码模块 12具体可以用于利用与发射端的传输矩阵乘积为 0的第 二预编码矩阵对协作数据进行预编码。
如图 5所示的实施例的发射端中各个模块的具体工作原理, 可以参见前述 方法实施例部分的描述。
如图 6所示为本发明协作通信系统中的接收端实施例的结构示意图, 该接 收端 20包括接收模块 21 , 该接收模块 21用于接收第一发射端发送的数据, 第 一发射端发送的数据包括釆用第一预编码矩阵预编码之后的负载数据和釆用 第二预编码矩阵对协作数据进行预编码获得的第二预编码数据。 该协作数据 包括第一发射端接收到的所述另一发射端发送的负载数据的至少一部分第二 预编码数据用以消除另一发射端发送的数据对第一预编码数据在接收端的干 扰。 第二预编码矩阵与传输矩阵的乘积为 0, 传输矩阵为第一发射端与第一接 收端之间的传输矩阵, 第一接收端为第一发射端的目标接收端。
其中,接收模块 21具体可以用于在 Τ个符号时隙,接收 TQ + T(M ~ Q)个数
2 据符号。
如图 6所示的接收端还可以包括处理模块 22, 该处理模块 22与接收模块 21 连接,该处理模块 22具体用于将 T个符号时隙的接收到的数据进行级联并将各 时隙对应的信道矩阵级联, 然后根据 MIMO接收算法处理接收到的数据。具体 可以釆用 ZF方法、 MMSE方法、 ML方法和 SIC方法等。
如图 6所示的接收端中各个模块的工作原理可以参见前述方法实施例的 描述。
本发明实施例提供的发射端和接收端可以是基于 MIMO技术进行数据传 输的系统中的各个装置。 例如, 如果用户设备 ( User Equipment , 简称 UE )与 - - 基站之间基于 MIMO方式传输数据, 则发射端可以是 UE, 接收端可以是基站。 或者, 发射端可以是基站, 接收端可以是 UE。 本发明实施例提供的协作通信系统中的发射端及接收端, 预编码模块釆 用第一预编码矩阵编码各个发射端的负载数据, 釆用第二预编码矩阵编码从 其他的发射端接收到的协作数据, 然后发送模块基于传输矩阵将预编码后的 负载数据和协作数据发送出去。 由于第二预编码矩阵和传输矩阵的乘积是 0, 接收端基于传输矩阵接收到的数据中不会包括协作数据, 即接收端不会接收 到其他发射端发送的一部分负载数据, 从而能够减小各个发射端之间的干扰。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步骤 可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读 取存储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述 的存储介质包括: ROM、 RAM, 磁碟或者光盘等各种可以存储程序代码的介

Claims

权 利 要 求
1、 一种协作通信系统中的数据传输方法, 其特征在于, 包括: 第一发射端利用第一预编码矩阵对自身的负载数据进行预编码, 获得第 一预编码数据;
所述第一发射端利用第二预编码矩阵对协作数据进行预编码, 获得第二 预编码数据以消除另一发射端发送的数据对所述第一预编码数据在接收端的 干扰, 所述协作数据包括所述第一发射端接收到的所述另一发射端发送的负 载数据的至少一部分;
所述第一发射端向所述接收端发送所述预编码后的所述第一预编码数据 及第二预编码数据。
2、 根据权利要求 1所述的方法, 其特征在于, 所述第一发射端向所述接 收端发送所述预编码后的所述第一预编码数据及第二预编码数据, 包括: 所述第一发射端在 T个符号时隙, 向所述接收端发送 ¾ + Τ(Μ 2- ω个数据 符号, Μ为所述第一发射端的天线个数, Q 为每个符号时隙所接收的所述另一 发射端的数据符号个数,其中 TQ对应对所述协作数据进行预编码后的第二预 编码数据, ΖΕ ^对应对自身的负载数据进行预编码后的第一预编码数据。
2
3、 根据权利要求 1或 2所述的方法, 其特征在于, 所述第二预编码矩阵与 所述第一发射端的传输矩阵乘积为零。
4、 根据权利要求 1或 2所述的方法, 其特征在于, 所述协作数据是所述另 一发射端的负载数据的子集。
5、 根据权利要求 4所述的方法, 其特征在于, 所述协作数据是在另一发 射端的负载数据中随机选择或者任意选择的, 其中所述协作数据数量为所述 负载数据的二分之一。
6、 一种协作通信系统中的数据传输方法, 其特征在于, 包括: 接收端接收第一发射端发送的数据, 所述第一发射端发送的数据包括根 据第一预编码矩阵对第一发射端的负载数据进行预编码获得的第一预编码数 据和根据第二预编码矩阵对协作数据进行预编码获得的第二预编码数据; 第 二预编码数据用以消除另一发射端发送的数据对所述第一预编码数据在接收 端的干扰, 所述协作数据包括所述第一发射端接收到的所述另一发射端发送 的负载数据的至少一部分。
7、 根据权利要求 6所述的方法, 其特征在于, 所述第二预编码矩阵与传 输矩阵的乘积为 0 , 所述传输矩阵为第一发射端与所述接收端之间的传输矩 阵。
8、 根据权利要求 6或 7所述的方法, 其特征在于, 所述接收端接收第一发 射端发送的数据, 包括:
在 T个符号时隙,接收 TQ+ T{M ~ Q)个数据符号, M为所述第一发射端的
2
天线个数, Q 为每个符号时隙所接收另一发射端的数据符号个数 其中 TQ对 应对所述协作数据进行预编码后的第二预编码数据, r(M_g)对应对自身的
2
负载数据进行预编码后的第一预编码数据。
9、 根据权利要求 8所述的方法, 其特征在于, 还包括:
将所述 T个符号时隙的接收到的所述数据进行级联并将各时隙对应的信 道矩阵级联, 然后根据多输入多输出接收算法处理接收到的所述数据。
10、 一种协作通信系统中的发射端, 其特征在于, 包括:
第一预编码模块, 用于利用第一预编码矩阵对自身的负载数据进行预编 码, 获得第一预编码数据;
第二预编码模块, 用于利用第二预编码矩阵对协作数据进行预编码, 获 得第二预编码数据以消除另一发射端发送的数据对所述第一预编码数据在接 收端的干扰, 所述协作数据包括所述第一发射端接收到的所述另一发射端发 送的负载数据的至少一部分;
发送模块, 用于向所述接收端发送所述预编码后的所述第一预编码数据 及第二预编码数据。
11、 根据权利要求 10所述的协作通信系统中的发射端, 其特征在于, 所 述发送模块具体用于在 T个符号时隙, 向所述接收端发送 TQ + T(M ~ Q)个数据 符号, M为所述第一发射端的天线个数, Q 为每个符号时隙所接收所述另一发 射端的数据符号个数, 其中 TQ对应对所述协作数据进行预编码后的第二预编 码数据, (Μ_ 对应对自身的负载数据进行预编码后的第一预编码数据。
2
12、 根据权利要求 10或 11所述的协作通信系统中的发射端, 其特征在于, 所述第二预编码模块具体用于利用与所述发射端的传输矩阵乘积为零的第二 预编码矩阵对协作数据进行预编码。
13、 一种协作通信系统中的接收端, 其特征在于, 包括:
接收模块, 用于接收第一发射端发送的数据, 所述第一发射端发送的数 据包括根据第一预编码矩阵对第一发射端的负载数据进行预编码获得的第一 预编码数据和根据第二预编码矩阵对协作数据进行预编码获得的第二预编码 数据; 第二预编码数据用以消除另一发射端发送的数据对所述第一预编码数 据在接收端的干扰, 所述协作数据包括所述第一发射端接收到的所述另一发 射端发送的负载数据的至少一部分。
14、 根据权利要求 13所述的协作通信系统中的接收端, 其特征在于, 所 述接收模块用于在 T个符号时隙, 接收 TQ+ T(M ~ Q)个数据符号, M为所述第
2
一发射端的天线个数, Q 为每个符号时隙所接收另一发射端的数据符号个数, 其中 TQ对应对所述协作数据进行预编码后的第二预编码数据, r( 2~g)对应 对自身的负载数据进行预编码后的第一预编码数据。
15、 根据权利要求 13或 14所述的协作通信系统中的接收端, 其特征在于, 还包括:
处理模块, 用于将所述 T个符号时隙的接收到的所述数据进行级联并将 各时隙对应的信道矩阵级联, 然后根据多输入多输出接收算法处理接收到的 所述数据。
PCT/CN2011/073590 2010-08-06 2011-05-03 协作通信系统中的数据传输方法、发射端及接收端 WO2011140938A1 (zh)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11780159.7A EP2602944B1 (en) 2010-08-06 2011-05-03 Data transmission method, transmission end and reception end in cooperative communication system
US13/760,912 US8731095B2 (en) 2010-08-06 2013-02-06 Data transmission method, transmitter and receiver in coordinated communication system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201010252132.5A CN102377528B (zh) 2010-08-06 2010-08-06 协作通信系统中的数据传输方法、发射端及接收端
CN201010252132.5 2010-08-06

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/760,912 Continuation US8731095B2 (en) 2010-08-06 2013-02-06 Data transmission method, transmitter and receiver in coordinated communication system

Publications (1)

Publication Number Publication Date
WO2011140938A1 true WO2011140938A1 (zh) 2011-11-17

Family

ID=44913931

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2011/073590 WO2011140938A1 (zh) 2010-08-06 2011-05-03 协作通信系统中的数据传输方法、发射端及接收端

Country Status (4)

Country Link
US (1) US8731095B2 (zh)
EP (1) EP2602944B1 (zh)
CN (1) CN102377528B (zh)
WO (1) WO2011140938A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9614599B2 (en) 2012-08-03 2017-04-04 Agency For Science, Technology And Research Method for determining precoding matrixes for communication and a system therefrom

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2728953A4 (en) * 2011-06-30 2015-03-18 Fujitsu Ltd DOWNLINK PRECODING METHOD, METHOD FOR DATA INTERACTION AND DEVICE IN COOPERATIVE MULTIPOINT TRANSMISSION SYSTEM
CN103368683B (zh) * 2012-03-29 2016-08-24 华为技术有限公司 一种数据流传输的方法和系统

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080192717A1 (en) * 2007-02-12 2008-08-14 Mark Kent Method and system for an alternating delta quantizer for limited feedback mimo pre-coders
CN101557367A (zh) * 2009-02-27 2009-10-14 东南大学 多点有限协同多输入多输出通信系统预编码方法
CN101557249A (zh) * 2008-04-07 2009-10-14 上海贝尔阿尔卡特股份有限公司 无线通信系统中控制协作传输下行信号的方法和装置
KR20100032806A (ko) * 2008-09-18 2010-03-26 엘지전자 주식회사 다중입력다중출력 방식 통신시스템에서 신호를 송수신하는 방법
US20100172430A1 (en) * 2009-01-05 2010-07-08 Ezer Melzer Precoding codebooks for mimo communication systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100951381B1 (ko) * 2006-08-10 2010-04-08 삼성전자주식회사 다중 사용자 환경의 다중 입력 다중 출력 시스템에서 낮은복잡도를 가지는 스케쥴링 장치 및 방법
WO2009088328A1 (en) * 2008-01-08 2009-07-16 Telefonaktiebolaget Lm Ericsson (Publ) Zero-forcing linear beamforming for coordinated cellular networks with distributed antennas
US9755705B2 (en) * 2008-08-07 2017-09-05 Qualcomm Incorporated Method and apparatus for supporting multi-user and single-user MIMO in a wireless communication system
US8675511B2 (en) * 2008-12-10 2014-03-18 Qualcomm Incorporated List elimination for distributed downlink coordinated multi-point (CoMP) framework

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080192717A1 (en) * 2007-02-12 2008-08-14 Mark Kent Method and system for an alternating delta quantizer for limited feedback mimo pre-coders
CN101557249A (zh) * 2008-04-07 2009-10-14 上海贝尔阿尔卡特股份有限公司 无线通信系统中控制协作传输下行信号的方法和装置
KR20100032806A (ko) * 2008-09-18 2010-03-26 엘지전자 주식회사 다중입력다중출력 방식 통신시스템에서 신호를 송수신하는 방법
US20100172430A1 (en) * 2009-01-05 2010-07-08 Ezer Melzer Precoding codebooks for mimo communication systems
CN101557367A (zh) * 2009-02-27 2009-10-14 东南大学 多点有限协同多输入多输出通信系统预编码方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9614599B2 (en) 2012-08-03 2017-04-04 Agency For Science, Technology And Research Method for determining precoding matrixes for communication and a system therefrom

Also Published As

Publication number Publication date
CN102377528A (zh) 2012-03-14
US20130148756A1 (en) 2013-06-13
CN102377528B (zh) 2015-07-08
EP2602944B1 (en) 2018-02-21
EP2602944A4 (en) 2013-07-31
EP2602944A1 (en) 2013-06-12
US8731095B2 (en) 2014-05-20

Similar Documents

Publication Publication Date Title
KR101530155B1 (ko) 무선 통신 시스템에서의 효율적인 상향링크 피드백
US20100173659A1 (en) Method and apparatus for implementing network coding in a long term evolution advanced system
JP2014099901A5 (zh)
WO2011020428A1 (zh) 用于实现下行多输入多输出传输的方法和装置
WO2011124021A1 (zh) 用于信息反馈以及预编码的方法和装置
WO2012022198A1 (zh) 基于pusch传输的上行控制信息的发送方法及系统
WO2013033919A1 (zh) 数据传输方法、系统、发射机和接收机
WO2015018030A1 (zh) 确定预编码矩阵指示的方法、接收设备和发送设备
JP2018504026A (ja) データ送信方法、送信側装置、および受信側装置
TW200913536A (en) A method for communicating in a MIMO context
WO2015100620A1 (zh) Ofdm通信系统及信号收发方法与装置
WO2018028331A1 (zh) 数据发送、接收方法和装置
WO2009076819A1 (zh) 多用户多入多出发射信号的方法、装置和通信系统
CN104380637A (zh) 生成在优化dl mu-mimo通信系统中的e节点b与ue之间的传输能力中使用的预编码器
WO2011050543A1 (zh) 获取下行信道状态信息的方法及装置
WO2011120429A1 (zh) 正交覆盖码配置和跳频配置指示方法和装置
WO2013040741A1 (zh) 数据传输方法、系统、发射机和接收机
WO2011098670A1 (en) Signaling support for mimo channel state information feedback
WO2014005474A1 (zh) 一种mu-mimo导频和数据发射方法、装置及系统
WO2011140938A1 (zh) 协作通信系统中的数据传输方法、发射端及接收端
WO2014101540A1 (zh) 一种预编码矩阵的选择方法和装置
WO2013007146A1 (zh) 一种上行多天线系统开环空间复用的发射方法和装置
WO2011082641A1 (zh) 一种传输信道质量信息的系统、终端及方法
WO2012041099A1 (zh) 物理harq指示符信道触发的传输块的重传方法及终端
WO2014190822A1 (zh) 一种下行虚拟多天线系统的数据传输方法、装置及系统

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: 11780159

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2011780159

Country of ref document: EP