基于门限决策的SDF中继选择策略性能分析

doi:10.11959/j.issn.1000-0801.2016003

Abstract

Abstract:

Cooperative transmission can effectively overcome performance degradation caused by channel fading and thus improve diversity effect.In order to improve the spectral efficiency of all-time cooperative,relay selection strategy with selective decode-and-forward protocol based on threshold decision was mainly investigated.The performance was also analysed and the approximate expression of the outage probability and the spectrum efficiency with high signal-to-noise（SNR）were derived.Simulation results show that under low-SNR and few relays circulations,the outage probability under different thresholds are very close.If the collaboration threshold increases by 0.09,the spectral efficiency improves by 0.12.Under high-SNR and many relays circulations,the spectral efficiency under different thresholds are similar.When the system outage probability is 10^-2,the collaboration threshold decreases by 0.9 and 1.1 dB SNR gain can be obtained.

Key words: selective decode-and-forward, relay selection, threshold decision, outage probability, spectrum efficiency

Jianwu ZHANG,Jing JIANG,Jianrong BAO,Bin JIANG. Performance analysis of relay selection strategy with selective decode-and-forward protocol based on threshold decision[J]. Telecommunications Science, 2016, 32(1): 18-24.

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References 15

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