Optimal Power Allocation and Relay Selection in OFDM-Based Cooperative Systems

被引：0
|
作者：
Wang, Lijie [1 ]
Zhao, Haitao [1 ]
Xi, Yong [1 ]
Wei, Jibo [1 ]
机构：
[1] Natl Univ Def Technol, Coll Elect Engn, Changsha, Hunan, Peoples R China
来源：
2010 6TH INTERNATIONAL CONFERENCE ON WIRELESS COMMUNICATIONS NETWORKING AND MOBILE COMPUTING (WICOM) | 2010年
关键词：
amplify-and-forward; decode-and-forward; OFDM; cooperative relaying); DIVERSITY;
D O I：
暂无
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
We consider an OFDM-based cooperative diversity system where a source communicates with a destination with the help of a relay in Amplify-and-Forward (AF) or Decode-and-Forward (DF) relaying. First, we propose a scheme to selecting the "best" relay to assist the transmission. Then, we present two power allocation schemes which are based on statistical channel status information (SCSI) and instantaneous channel status information (ICSI), respectively to minimize system outage probability. From analysis and simulation, we show that with the help of the "best" relay, full diversity order is achieved, and the proposed power allocation schemes have better performance than fixed power allocation in terms of outage behavior.
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页数：5
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