放大转发协作通信中继位置对SER性能的影响

doi:10.3969/j.issn.0255-8297.2012.05.007

应用科学学报 ›› 2012, Vol. 30 ›› Issue (5): 479-486.doi: 10.3969/j.issn.0255-8297.2012.05.007

放大转发协作通信中继位置对SER性能的影响

李云1;2，黄清1

1．重庆邮电大学移动通信重点实验室，重庆400065
2．东南大学移动通信国家重点实验室，南京210096

收稿日期:2011-07-04 修回日期:2011-11-24 出版日期:2012-09-24 发布日期:2012-09-25
通信作者: 李云，教授，博导，研究方向：宽带无线接入技术，E-mail: liyun@cqupt.edu.cn
作者简介:李云，教授，博导，研究方向：宽带无线接入技术，E-mail: liyun@cqupt.edu.cn
基金资助:
国家自然科学基金(No.61071118, No.60702055)；重庆市科委杰出青年科学基金；重庆市科委重点实验室专项经费基金(No.CSTC2009BB2279)资助

Impact of Relay Location on SER for Amplify-and-Forward Cooperative Communications

LI Yun1;2, HUANG Qing1

1. Key Laboratory of Mobile Communication Technology, Chongqing University of Posts and Telecommunications,
Chongqing 400065, China
2. National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China

Received:2011-07-04 Revised:2011-11-24 Online:2012-09-24 Published:2012-09-25

摘要/Abstract

摘要：

针对放大转发协作网络多跳中继节点位置对系统性能的影响，分析了端到端链路的误码率. 根据误码率并通过设定不同节点间距离来确定最优中继位置. 针对多跳中继网络，提出了基于信道状态信息的节点选择算法，在不同的选取准则下以最小值最大化为目标. 为了考虑中继位置，进而提出基于节点位置信息的中继节点选择算法，确保选择一个最低误码率的节点为协作节点. 仿真结果表明，多跳中继最优位置处于源节点和目的节点的中点处. 与已有放大转发模式下的单跳中继相比，多跳中继在系统具有较低的总传输功率时具有更好的性能.

关键词: 信道状态信息, 中继选择, 误码率, 放大转发, 中继位置

Abstract:

In this paper, we analyze the symbol error rate (SER) for end-to-end link in amplify-and-forward (AF) cooperative networks. An optimal relay position is made by setting the distance between nodes. A multihop relay selection algorithm based on channel state information (CSI) is proposed, which is the expansion of single-hop relay selection to ensure the lowest SER of the cooperative node. A multi-hop relay selection algorithm based on node position is then investigated according to the impact of node position on system performance. Simulation results indicate that the optimal multi-relay position is at the midpoint between the source and destination nodes, and the multi-hop method provides significant performance gain in terms of total energy over the exiting AF relay selection algorithms.

Key words: relay selection, symbol error rate (SER), relay location, channel state information (CSI), amplify-and-forward

中图分类号:

TN929.5

李云1;2，黄清1. 放大转发协作通信中继位置对SER性能的影响[J]. 应用科学学报, 2012, 30(5): 479-486.

LI Yun1;2, HUANG Qing1. Impact of Relay Location on SER for Amplify-and-Forward Cooperative Communications[J]. Journal of Applied Sciences, 2012, 30(5): 479-486.

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放大转发协作通信中继位置对SER性能的影响

Impact of Relay Location on SER for Amplify-and-Forward Cooperative Communications

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