Power Allocation Schems for Decode-and-Forward MIMO-OFDM Relay System
Cooperative relaying strategies have become a major topic in the wireless research community and that decode-and-forward relay technology can suppress noises effectively. In order to achieve the maximum capacity- of the system, the optimal allocation algorithm is proposed under the assumption that all nodes know accurate channel instantaneous stale information (CSI). Because it is hard to obtain a general solution expression during deducing, we provide an iterative power allocation algorithm with a simpler structure. Numerical results show that adopting the proposed power allocation algorithm, the capacity of MIMO relay channel with DF relay scheme can improve 1.4 bps/Hz. Through analysis, a proper iterative precision value can be found to keep the good balance between system capacity and complexity. To further improve the system capacity, we use the subcarrier pairing strategy before power allocation
DF relay power allocation MIMO OFDM
Min Huang Ping Wang Lijun Zu Wancheng Ge Xin Yang
Broadband Wireless Communication and Multimedia Laboratory, Tongji University,Shanghai 201804, China Broadband Wireless Communication and Multimedia Laboratory, Tongji University, Shanghai 201804, Chin Broadband Wireless Communication and Multimedia Laboratory,Tongji University,Shanghai 201804, China hanghai Research Center for Wireless Communications, Shanghai 200335, China
国际会议
太原
英文
489-493
2011-02-26（万方平台首次上网日期，不代表论文的发表时间）