Relay and antenna joint selection method for full-duplex bidirectional relay system

Abstract

The invention discloses a relay and antenna joint selection method for a full-duplex bidirectional relay system. The method comprises the following steps: calculating the signal-to-noise ratios of relay nodes relative to two source nodes, and selecting the minimum signal-to-noise ratios as the effective signal-to-noise ratios of the relay nodes; screening out the relay node corresponding to the maximum signal-to-noise ratio, and taking the relay node as an optimal relay node; calculating the signal-to-noise ratios of the two source nodes based on different antenna configuration modes, and screening out the maximum of the signal-to-noise ratios of the two source nodes and the optimal relay node relative to different antenna configuration modes; and setting the antenna configuration mode corresponding to the maximum of the signal-to-noise ratios as an optimal antenna configuration mode. The relay and antenna joint selection method for a full-duplex bidirectional relay system is based on joint selection of an optimal relay and an optimal antenna configuration mode. Communication system link performance optimization is realized, and the achievable rate and spectrum efficiency of the communication system are improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for jointly selecting a relay and an antenna for a full-duplex two-way relay system. Background technique [0002] The external contradiction between the explosive growth of wireless communication traffic and the shortage of spectrum resources drives the internal change of wireless communication theory and technology. Traditional wireless communication systems mostly work in the traditional half-duplex mode, generally divided into time-division Duplex (TDD) and frequency division duplex (FDD) two working modes, these two working modes respectively divide the time domain and frequency domain resources into mutually independent orthogonal resources, so as to isolate the sending and receiving signals, and then avoid the signal mutual interference. TDD refers to the duplex mode in which the transceiver end of the communication system uses the same frequency t...

AI Technical Summary

Problems solved by technology

However, in the existing link selection technical solutions of full-duplex two-way relay systems, each node can realize the simultaneous and same frequency of signals through a shared antenna for transmitting and receiving or two separate antennas with predefined transmitting and receiving functions. The antenna selection technology is limited to the selection of the number of antennas, which not only cannot give full play to the advantages of the link selection technology, but also reduces the flexibility of selection, and when the link is transmitted from the source node to the relay receiving antenna or from the relay transmitting antenna to the destination node When the channel link falls into deep fading, it will seriously affect the system performance

[0004] Therefore, in the process of realizing the present invention, the inventor found that the prior art has at least the following defects: the link performance and spectrum efficiency in the existing full-duplex two-way relay system need to be improved

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