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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。
Aiming at cooperative communication network scenario, a distributed optimal relay selection mechanism is designed, and then an incremental relay protocol based on generalized spatial modulation is proposed. The information bits are mapped to two information carriers: modulation constellation symbols and airspace symbols. The spatial domain The symbol refers to a combination of active relays in a symbol period, and the combination of active relays is determined based on the bits of the transmitted information. In contrast to airspace modulation delta relay protocol, this mechanism allows multiple active relays to transmit information symbols simultaneously, thereby providing more flexibility. In this paper, the performance of this protocol is analyzed and the theoretical upper bound of frame error rate is deduced. Simulation results show that the proposed algorithm has significantly improved network lifetime, frame error rate and throughput compared with traditional mechanisms.