Performance Analysis of Cognitive Cooperative Systems Based on Quadrature Spatial Modulation

doi:10.16182/j.issn1004731x.joss.20-0027

Abstract

Abstract: The cognitive cooperative communication system based on quadrature spatial modulation (QSM) is proposed to solve the problems of inter-channel interference and inter-antenna synchronization. The mean power allocation algorithm is used to analyze performance of the system. In addition, the relay nodes and the destination node decode their received signals with the maximum likelihood detection algorithm. The exact closed expressions of outage probability under random relay selection (RRS), suboptimal relay selection (SRS) and optimal relay selection (ORS) are derived respectively. The approximate outage probabilities in the high signal-to-noise ratio region are derived, and the diversity gains of three relay selection strategies are analyzed. The Monte Carlo simulation results show that SRS and ORS can obviously reduce the outage probability and effectively improve the gain of the system compared with RRS.

Key words: quadrature spatial modulation, cognitive radio, relay selection, power allocation strategy, maximum likelihood detection

CLC Number:

TN820
TP391

Guo Hui, Guo Xuejiao, Qiao Ting, Liu Meng. Performance Analysis of Cognitive Cooperative Systems Based on Quadrature Spatial Modulation[J]. Journal of System Simulation, 2021, 33(5): 1113-1121.

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