Position optimization method for full-duplex relay cooperative communication

An optimization method, a technology of collaborative communication, applied in the field of communication, which can solve problems such as unresearched

Active Publication Date: 2016-10-26
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Therefore, for FDR, considering that the delay of the relay is greater than 1, and using the direct link to transmit effective

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  • Position optimization method for full-duplex relay cooperative communication
  • Position optimization method for full-duplex relay cooperative communication
  • Position optimization method for full-duplex relay cooperative communication

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[0044] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the implementation process of how to apply technical means to solve technical problems and achieve corresponding technical effects in the present invention. The embodiments of the present application and the various features in the embodiments can be combined with each other under the premise of no conflict, and the formed technical solutions are all within the protection scope of the present invention.

[0045] The present invention considers a general three-node relay system, including a source node, a relay node and a destination node, and the relay is full-duplex and adopts a decoding and forwarding strategy. Assuming that the forwarding delay of the relay is greater than 1, the closed-form solution of the system outage probability is deduced by using the direct link and RSI. Theoretical res...

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Abstract

The invention provides a position optimization method for full-duplex relay cooperative communication, and belongs to the technical field of communications. The relay is in a full-duplex mode and adopts a decoding and forwarding strategy, the outage probability of a system is calculated using a direct link and residual self-interference when the relay forwarding delay is more than 1, and an optimal relay position is found by optimization. Experiments prove that the outage probability of the system is gradually increased with increase of the residual self-interference or reduction of the intensity of the direct link, and the optimal relay position moves to a source node with increase of the residual self-interference or improvement of the intensity of the direct link. The method can effectively utilize the information transmitted by the direct link, and significantly improves the spectral efficiency under the system model relative to the existing method taking the direct link as interference.

Description

technical field [0001] The invention relates to the communication field, in particular to a position optimization method for full-duplex relay cooperative communication. Background technique [0002] A full-duplex relay (full-duplex relay, FDR) can simultaneously transmit and receive signals at the same frequency, so in order to improve the spectrum efficiency of the relay transmission system, FDR has begun to attract the attention of the academic community. However, FDR can cause signal leakage between transmission and reception during transmission, that is, self-interfering signals. Although there are many novel cancellation techniques nowadays, self-interference cannot be completely removed due to the limitations of various practical conditions, so the residual self-interference (RSI) problem must be considered in FDR. A relevant reference has proposed a practical residual self-interference model, assuming RSI plus complex Gaussian, its variance is proportional to the ex...

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Application Information

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IPC IPC(8): H04B7/155H04L5/14
CPCH04B7/155H04B7/15585H04L5/14
Inventor 王强董敏华齐航杨丽娜胡鑫韦伟黄健欧
Owner BEIJING UNIV OF POSTS & TELECOMM
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