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Method for parallelizing matrix channels of two-way relay MIMO (Multiple Input Multiple Output) system

A two-way relay and matrix technology, applied in the field of communication, can solve problems affecting system performance, noise amplification between relays and users, and changes in noise statistical characteristics

Inactive Publication Date: 2013-07-24
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In the existing parallelization method, although the precoding matrix of the user and the relay completes the parallelization of the matrix channel, because the receiving part of the relay matrix and user reception matrix It is not a unitary matrix, which will change the statistical characteristics of the noise. Generally speaking, it will cause the noise amplification at the relay and the user, especially the noise amplification at the relay will seriously affect the performance of the entire system.

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  • Method for parallelizing matrix channels of two-way relay MIMO (Multiple Input Multiple Output) system
  • Method for parallelizing matrix channels of two-way relay MIMO (Multiple Input Multiple Output) system
  • Method for parallelizing matrix channels of two-way relay MIMO (Multiple Input Multiple Output) system

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[0063] image 3 It is a schematic diagram of inter-user communication in a specific implementation manner of a matrix channel parallelization method for a two-way relay MIMO system of the present invention. Here, only the case where user 1 communicates with user 2 is described. Such as image 3 As shown, λ 1 ,...,λ N In order to adopt the characteristic subchannels obtained by the present invention from user 1 to the relay, N is the number of characteristic subchannels, n 1 ,...,n N is the Gaussian noise of each characteristic subchannel at the relay; is the characteristic subchannel relayed to user 2, M is the number of characteristic subchannels, is the Gaussian noise of each eigensubchannel at user 2.

[0064] When accessing a slot, both users 1 and 2 send signals to the relay. The channel matrix from user 1 to the relay is obtained through joint unitary triangular decomposition Thus, the precoding matrix of user 1 is obtained The signal sent 1 After precodin...

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Abstract

The invention discloses a method for parallelizing matrix channels of a two-way relay MIMO (Multiple Input Multiple Output) system. In consideration of a problem that system performance is affected since noise can be seriously amplified by a relay and a user receiving matrix which are designed by a traditional parallelizing algorithm, a joint unitary triangular decomposition method is used; a relay and a user receiving matrix with unitary matrix properties are designed; in addition, dirty paper coding is implemented at a user transmitting end; and under the matching of a receiving end, successive interference elimination is implemented, so that the matrix channels are parallelized. By virtue of the two-way relay MIMO system, the noise at the relay is not amplified, the effect on the system rate caused by the noise at the relay can be effectively restrained and the system performance is enhanced.

Description

technical field [0001] The invention belongs to the technical field of communication, and more specifically relates to a matrix channel parallelization method of a two-way relay MIMO (Multiple-Input Multiple-Output, Multiple-Input Multiple-Output) system. Background technique [0002] Different from the traditional one-way relay system, using ANC (Analog-Network-Coding, analog network coding) technology, the two-way relay MIMO system can complete the communication process between users within two time slots. figure 1 It is a block diagram of two-way relay MIMO system access and broadcast time slot system. Such as figure 1 As shown, the first time slot is the access time slot, two users send signals to the relay node at the same time, H 1 is the channel matrix between user 1 and the relay in the access slot, H 2 is the channel matrix between user 2 and the relay in the access time slot; the second time slot is the broadcast time slot, and the relay broadcasts the mixed sig...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/06H04B7/08
Inventor 张霄龙陈智张铎石宇
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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