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

电信科学 ›› 2016, Vol. 32 ›› Issue (1): 18-24.doi: 10.11959/j.issn.1000-0801.2016003

基于门限决策的SDF中继选择策略性能分析

章坚武¹,蒋静¹,包建荣^1,²,姜斌¹

¹ 杭州电子科技大学通信工程学院，浙江杭州310018
² 东南大学移动通信国家重点实验室，江苏南京210096

出版日期:2016-01-20 发布日期:2017-06-23
基金资助:
浙江省自然科学基金资助项目;国家自然科学基金资助项目;东南大学移动通信国家重点实验室开放研究基金资助项目

Performance analysis of relay selection strategy with selective decode-and-forward protocol based on threshold decision

Jianwu ZHANG¹,Jing JIANG¹,Jianrong BAO^1,²,Bin JIANG¹

¹ College of Communication Engineering,Hangzhou Dianzi University,Hangzhou 310018,China
² National Key Laboratory of Mobile Communication,Southeast University,Nanjing 210096,China

Online:2016-01-20 Published:2017-06-23
Supported by:
The Zhejiang Provincial Natural Science Foundation of China;The National Natural Science Foundation of China;The Open Research Fund of National Mobile Communications Research Laboratory,Southeast University

摘要/Abstract

摘要：

中继协作传输能有效克服信道衰落影响，提高分集效果。为了提高全天候协作系统的频谱效率，在选择解码转发协议的前提下，研究了基于门限决策的中继选择策略，分析了其性能，并推导了高信噪比下的中断概率和频谱效率的近似表达式。仿真表明，在低信噪比和较少中继的场景中，不同门限下的中断概率十分接近，如果协作门限增加0.09，系统频谱效率可提高0.12；在高信噪比和较多中继的场景中，不同门限下的频谱效率较为接近，当系统中断概率为10^-2时，如果协作门限减少0.9，可获得约1.1 dB的信噪比增益。

关键词: 选择解码转发, 中继选择, 门限决策, 中断概率, 频谱效率

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

章坚武,蒋静,包建荣,姜斌. 基于门限决策的SDF中继选择策略性能分析[J]. 电信科学, 2016, 32(1): 18-24.

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.

图/表 5

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基于门限决策的SDF中继选择策略性能分析

Performance analysis of relay selection strategy with selective decode-and-forward protocol based on threshold decision

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