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。%A distributed best-relay selection scheme is designed for cooperative networks. Then an incre-mental 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 sym-bol 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 life-time, FER and throughput.
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