【摘要】 针对协作通信网络场景,设计一种分布式最佳中继选择机制,进而提出基于广义空域调制的增量中继协议,将信息比特映射到调制星座符号和空域符号两个信息载体上,其中空域符号指符号周期内活跃中继的组合方式,活跃中继的组合根据发送信息比特来确定。与空域调制增量中继协议不同,该机制允许多个活跃中继同时发送信息符号,因而更具灵活性。文中分析了该协议的性能,推导出误帧率的理论上界。仿真结果表明:所提算法的网络生存时间、误帧率和吞吐量相比传统机制均有显著提高。更多还原

【Abstract】 A distributed best- relay selection scheme is designed for cooperative networks. Then an incremental relaying protocol is proposed based on generalized spatial modulation( GSMIR). The basic idea of the scheme is to map a section of information bits to two information carrying units: 1) a modulation symbol that is chosen from constellation diagram and 2) a spatial symbol that is actual combination of active relays at each symbol instance. Unlike incremental relaying protocol based on spatial modulation,GSMIR is more flexible by sending a data symbol from more than one active relay at a time. The performance of GSMIR is analyzed,and an upper bound on frame error ratio( FER) is derived in this paper. Finally,simulation results indicates that the proposed schemes bring significant performance gain in network lifetime,FER and throughput.更多还原