收稿日期: 2011-07-04
修回日期: 2011-11-24
网络出版日期: 2012-09-25
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
Received date: 2011-07-04
Revised date: 2011-11-24
Online published: 2012-09-25
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 . DOI: 10.3969/j.issn.0255-8297.2012.05.007
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.
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