Joint Optimization of Subchannel Reassignment and Power Adaptation for Multicarrier Cooperative Systems  

作　　者：SHAN Hangguan WANG Hao WANG Zongxin 

机构地区：[1]Department of Communication Science and Engineering, Fudan University, Shanghai 200433, China

出　　处：《Chinese Journal of Electronics》2008年第2期381-385,共5页电子学报（英文版）

摘　　要：An amplify-and-forward multicarrier cooperative system was proposed in this paper. The optimal resource-allocation problem was investigated in terms of improving data rate. An effective resource-allocation algorithm was proposed based on three techniques, adaptive modulation, subchannel reassignment design and transmit power adaptation. The designed subchannel reassignment not only increases the average data rate, but also raises the threshold of ＂water-filling＂ in optimizing power allocation that can further increase data rate. Since the power allocation is based on the designed subchannel reassignment, the complexity of the proposed algorithm is reduced greatly. Simulation results show that the proposed algorithm effectively increases the system＇s average data rate.

关 键 词：Cooperative communication  Resource allocation  Adaptive modulation  Subchannel reassignment Power adaptation 

分 类 号：TN91[电子电信—通信与信息系统]