OPTIMAL POWER ALLOCATION WITH AF AND SDF STRATEGIES IN DUAL-HOP COOPERATIVE MIMO NETWORKS  

作　　者：Xu Xiaorong Zheng Baoyu Zhang Jianwu 

机构地区：[1]Institute of Signal Processing and Transmission, Nanjing University of Posts and Telecommunications, Nanjing 210003, China [2]College of Telecommunication Engineering, Hangzhou Dianzi University, Hangzhou 310018, China

出　　处：《Journal of Electronics(China)》2010年第3期328-339,共12页电子科学学刊（英文版）

基　　金：Supported by National Natural Science Foundation of China (NSFC) (No. 60972039);National High Technology Research and Development Program of China (No.2009AA01Z241);Innovation Program for Ph.D. and Postgraduate Candidates in Jiangsu Province (No.CX09B_147Z)

摘　　要：Dual-hop cooperative Multiple-Input Multiple-Output (MIMO) network with multi-relay cooperative communication is introduced. Power allocation problem with Amplify-and-Forward (AF) and Selective Decode-and-Forward (SDF) strategies in multi-node scenario are formulated and solved respectively. Optimal power allocation schemes that maximize system capacity with AF strategy are presented. In addition, optimal power allocation methods that minimize asymptotic Symbol Error Rate (SER) with SDF cooperative protocol in multi-node scenario are also proposed. Furthermore, performance comparisons are provided in terms of system capacity and approximate SER. Numerical and simulation results confirm our theoretical analysis. It is revealed that, maximum system capacity could be obtained when powers are allocated optimally with AF protocol, while minimization of system's SER could also be achieved with optimum power allocation in SDF strategy. In multi-node scenario, those optimal power allocation algorithms are superior to conventional equal power allocation schemes.Dual-hop cooperative Multiple-Input Multiple-Output （MIMO） network with multi-relay cooperative communication is introduced. Power allocation problem with Amplify-and-Forward （AF） and Selective Decode-and-Forward （SDF） strategies in multi-node scenario are formulated and solved respectively. Optimal power allocation schemes that maximize system capacity with AF strategy are presented. In addition, optimal power allocation methods that minimize asymptotic Symbol Error Rate （SER） with SDF cooperative protocol in multi-node scenario are also proposed. Furthermore, per- formance comparisons are provided in terms of system capacity and approximate SER. Numerical and simulation results confirm our theoretical analysis. It is revealed that, maximum system capacity could be obtained when powers are allocated optimally with AF protocol, while minimization of system＇s SER could also be achieved with optimum power allocation in SDF strategy. In multi-node scenario, those optimal power allocation algorithms are superior to conventional equal power allocation schemes.

关 键 词：Dual-hop cooperative Multiple-Input Multiple-Output (MIMO) network Optimal power allocation Amplify-and-Forward (AF) Selective Decode-and-Forward (SDF) System capacity Asymptotic Symbol Error Rate (SER) 

分 类 号：TN929.5[电子电信—通信与信息系统]