Power Allocation in Decode-and-Forward Cooperative OFDM Systems Using Perfect and Limited Feedback

被引：0
|
作者：
Zhang Guangchi [1 ]
Zhan Weixu [2 ]
Qin Jiayin [3 ]
机构：
[1] Guangdong Univ Technol, Fac Informat Engn, Guangzhou 510006, Guangdong, Peoples R China
[2] Informat Ctr Guangdong Power Grid, Guangzhou 510600, Guangdong, Peoples R China
[3] Sun Yat Sen Univ, Sch Informat Sci & Technol, Guangzhou 510275, Guangdong, Peoples R China
来源：
CHINESE JOURNAL OF ELECTRONICS | 2010年 / 19卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Cooperative communication; Orthogonal frequency division multiplexing (OFDM); Power allocation; Channel state information (CSI); Limited feedback; NETWORKS;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
To maximize the spectral efficiency of a Decode-and-forward (DF) cooperative Orthogonal frequency division multiplexing (OFDM) system, we first propose the optimal power allocation algorithm when perfect Channel state information (CSI) feedback is available. Since perfect CSI feedback is unrealistic, we further propose a power allocation scheme using limited feedback, where the power allocation vectors for the source and relay are limited in two finite power allocation tables respectively. In this scheme, the destination chooses the power allocation vectors for the source and relay, and feeds the indices of the vectors back. The power allocation tables are designed by using the Lloyd algorithm. Simulation results show that the perfect CSI feedback power allocation scheme achieves the best performance, and that the performance of the limited feedback scheme lies between the perfect CSI scheme and the scheme with no CSI.
引用
收藏
页码：291 / 295
页数：5
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