译码转发系统中一种半分布式用户选择策略

孙黎; 张太镒

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译码转发系统中一种半分布式用户选择策略

更新时间：2025-07-09

- 译码转发系统中一种半分布式用户选择策略
- Semi-Distributed User Selection Scheme in Decode-and-Forward Systems
- 西安交通大学学报 2009年43卷第12期页码：115-119
- 作者机构：
  
  西安交通大学电子与信息工程学院,西安,710049
- 作者简介：
- 基金信息：
  
  : 2009-03-07. 作者简介: 孙黎(1983-),男,博士生;张太镒(联系人),男,教授,博士生导师. 基金项目: 国家自然科学基金重点项目(40730424)
- DOI：
  中图分类号： TN929.5
- 网络首发：2009-12-10，
  
  纸质出版：2009
- 稿件说明：
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孙黎, 张太镒. 译码转发系统中一种半分布式用户选择策略[J]. 西安交通大学学报, 2009,43(12):115-119.

Semi-Distributed User Selection Scheme in Decode-and-Forward Systems[J]. 2009, 43(12): 115-119.
孙黎, 张太镒. 译码转发系统中一种半分布式用户选择策略[J]. 西安交通大学学报, 2009,43(12):115-119. DOI：

Semi-Distributed User Selection Scheme in Decode-and-Forward Systems[J]. 2009, 43(12): 115-119. DOI：

摘要

针对译码转发系统中传统的用户选择策略复杂度过高的问题

提出一种半分布式用户选择策略(SDUS策略).该策略以最大化系统瞬时互信息量为目标

引入中继选择的判决门限

并根据此门限生成协作集

目的节点从协作集及源节点(当协作集为空集时)中选择信道质量最好的用户作为协作节点.SDUS策略不仅能够显著降低系统的运算复杂度

还能够改善系统的中断性能.仿真实验表明

当信噪比为20 dB且系统中的中继节点数为120时

SDUS策略的运算开销仅约为机会中继策略和选择协作策略的39.5%和51.1%.

Abstract

A semi-distributed user selection scheme(SDUS scheme)is proposed to reduce the high complexity in conventional user selection schemes in decode-and-forward(DF)systems.A decision threshold for relay selection is introduced to maximize the instantaneous mutual information of the system. Based on the threshold

the cooperative set is generated.The destination node selects the node with the best channel quality from the cooperative set and the source(when the cooperative set is null)as the cooperative node.The SDUS scheme not only reduces the computational complexity of the system significantly

but also improves the outage performance.Simulation results show that

when the signal-to-noise ratio is 20 dB and the number of relay nodes is 120

the computational cost of the SDUS scheme is just about 39.5% and 51.1% of those of the opportunistic relaying scheme and the selection cooperation scheme

respectively.

关键词

Keywords

references

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殷勤业,张莹,丁乐,等.协作分集:一种新的空域分集技术[J].西安交通大学学报,2005,39(6): 551-557.

YIN Qinye, ZHANG Ying, DING Le, et al.Cooperation diversity: a new spatial diversity technique [J].Journal of Xi'an Jiaotong University, 2005, 39(6): 551-557.

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BLETSAS A, KHISTI A, REED D P, et al. A simple cooperative diversity method based on network path selection [J].IEEE Journal on Selected Areas in Communications, 2006, 24(3): 659-672.

LANEMAN J N, TSE D N C, WORNELL G W. Cooperative diversity in wireless networks: efficient protocols and outage behavior [J].IEEE Transactions on Information Theory, 2004, 50(12): 3062-3080.

ZHENG Lizhong, TSE D. Diversity and multiplexing: a fundamental tradeoff in multiple antenna channels [J].IEEE Transactions on Information Theory, 2003,49(5): 1073-1096.

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