基于信道统计特性的中继选择与功率分配算法  

Statistic Channel Information-based Relay Selection and Power Allocation Scheme

作　　者：康虹[1,2] 冯文江[1] 贾年龙[1] 孟器宇[3] 

机构地区：[1]重庆大学通信工程学院 [2]重庆电子工程职业学院 [3]中国人民解放军66489部队

出　　处：《世界科技研究与发展》2013年第3期344-347,共4页World Sci-Tech R&D

基　　金：重庆市自然科学基金重点项目(CSTC2009BA2064)资助

摘　　要：针对放大前传多源协同通信网络,在保证系统满足一定中断概率的前提下,以最小化系统总发射功率为目标,提出一种基于信道统计特性的中继选择与功率分配算法。由目的节点根据源节点的优先级因子,依次确定是需要直传还是选择中继进行协同前传,以及相应的源节点和中继节点的最优发射功率。该算法运算复杂度低,且无需在传输中实时更新,能节省系统开销。仿真结果表明,与直接传输和AF策略相比,该算法能有效节省传输所需要的总发射功率,且性能优于凸松弛算法,与最优穷举搜索算法相近。A statistic channel information-based relay selection and power allocation scheme are proposed,in order to minimize total transmit power of the system while guaranteeing the outage probability at the same time for amplify-and-forward cooperative networks with multiple sources. In the proposed scheme, according to the priority factor of each source, the destination is decided in turn with direct transmission or select relay to cooperate and corresponding optimal transmit power of source and relay. The proposed scheme has low computational complexi- ty, with system cost saved due to no real-time updating. Simulation results show that with the proposed scheme, the total transmission power is saved significantly compared with the direct transmission and AF scheme. For the performance,it＇s superior to convex relaxation scheme and similar to the optimal exhaustive search scheme.

关 键 词：多源协同通信 放大前传 中继选择 功率分配 中断概率 

分 类 号：TN911.5[电子电信—通信与信息系统]