Space-time autoencoding method for full-duplex two-way relay network
A two-way relay and full-duplex technology, which is applied in the field of communication, can solve the problems of reduced spectrum efficiency and performance of full-duplex systems, and achieve the effects of overcoming low spectrum efficiency, improving outage probability performance, and improving reliability
Active Publication Date: 2018-03-06
XIDIAN UNIV
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The disadvantage of this method is that the residual loop interference after loop elimination in the full-duplex cooperative system will still reduce the performance of the full-duplex system
The disadvantage of this method is that this method is only suitable for one-way full-duplex system, if it is used for two-way full-duplex system, its optimal relay amplification factor will no longer be applicable, and the spectral efficiency will be greatly reduced
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[0050] The present invention will be further described below in conjunction with the accompanying drawings.
[0051] refer to figure 1 , the method of the present invention is in figure 1 realized in the scenario. exist figure 1 Among them, T1 represents the terminal node, R represents the relay node, and T2 represents the terminal node. h 11 Indicates the loop channel parameter of terminal node T1, h 1R Indicates the channel parameters from the terminal node T1 to the relay node, h 12 Indicates the channel parameters from terminal node T1 to terminal node T2, h RR Indicates the loop channel parameter of the relay node, h R1 Indicates the channel parameters from the relay node to the terminal node T1, h R2 Indicates the channel parameters from the terminal node T2 to the relay node, h 22 Indicates the loop channel parameter of terminal node T2, h 2R Indicates the channel parameters from the terminal node T2 to the relay node, h 21 Indicates the channel parameters fr...
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The invention discloses a space-time self-coding method for a full-duplex two-way relay network, and aims to solve the problem of low full-duplex system performance and spectral efficiency due to interference of a residual loop in the prior art. The space-time self-coding method disclosed by the invention comprises the following specific steps: firstly, estimating a channel parameter by adopting a minimum mean square error estimation method; secondly, modulating a signal to be sent by adopting a quadrature phase shift keying QPSK method by a terminal node; then, estimating a transmitting signal of the terminal node and performing asynchronous space-time coding by eliminating a loop signal of a relay node; and finally, performing space-time decoding by constructing an equivalent channel matrix on the basis of offset of the loop reference of the terminal node. The space-time self-coding method disclosed by the invention is applied to full-duplex two-way communication and can increase the full-duplex communication reliability; and the spectral efficiency of a cooperative communication system is increased.
Description
technical field [0001] The invention belongs to the field of communication technology, and further relates to a space-time self-encoding method of a full-duplex bidirectional relay network in the field of asynchronous space-time code technology of wireless communication. The invention can be used for the space-time coding in the distributed cooperative communication system of future wireless mobile communication, and improves the reliability and spectrum utilization rate of the cooperative communication system. Background technique [0002] In a cooperative communication system, by using multiple relay nodes to forward the signal of the source node, the spatial diversity gain similar to that of the MIMO system can be obtained, which is called cooperative diversity. When the processing delays of the relay nodes are different, the cooperative diversity gain can be obtained through asynchronous cooperative space-time coding. The working mode of the node is divided into half-du...
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IPC IPC(8): H04L5/00H04L5/14H04L25/02
CPCH04L5/0023H04L5/14H04L25/024
Inventor 刘毅沈盼张志强张海林李勇朝张志鹏
Owner XIDIAN UNIV