PARTIAL CHANNEL STATE INFORMATION BASED SUB-OPTIMAL SDMA STRATEGIES IN MULTIPLE RELAY CHANNELS  

作　　者：Yu Fei Yang Luxi 

机构地区：[1]School of Information Science and Engineering, Southeast University, Nanjing 210095, China

出　　处：《Journal of Electronics(China)》2009年第4期473-478,共6页电子科学学刊（英文版）

基　　金：Supported by National Basic Research Program of China (2007CB310603);National Natural Science Foundation of China (No.60672093);National High Technology Project of China (2007AA01Z262)

摘　　要：Joint sub-optimization of cooperative relays in Multiple-Input and Multiple-Output (MIMO) multiple relays aided communication system is discussed in this paper. Because the instantaneous channel state information of all source-relay channels and all relay-user channels is difficult to get at each relay node, an unjoined solution is designed according to the channel state information of that relay only. Then a multi-user loading algorithm is proposed to utilize the space diversity through multi-relay transmission. The simulation results show that with the newly proposed multi-user loading algorithm, the unjoined solution can achieve better system performance comparing with joint one in low SNR. However, the complexity of the former is much lower, for only partial CSI is needed.Joint sub-optimization of cooperative relays in Multiple-Input and Multiple-Output （MIMO） multiple relays aided communication system is discussed in this paper. Because the instantaneous channel state information of all source-relay channels and all relay-user channels is difficult to get at each relay node, an unjoined solution is designed according to the channel state information of that relay only. Then a multi-user loading algorithm is proposed to utilize the space diversity through multi-relay transmission. The simulation results show that with the newly proposed multi-user loading algorithm, the unjoined solution can achieve better system performance comparing with joint one in low SNR. However, the complexity of the former is much lower, for only partial CSI is needed.

关 键 词：Multiple relay Multiple-Input and Multiple-Output （MIMO） Sub-optimization Limited feedback 

分 类 号：TN929.5[电子电信—通信与信息系统] TM58[电子电信—信息与通信工程]