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协作分集技术可以有效提高移动通信系统的容量和可靠性。针对时间异步的协作通信系统,提出一种基于分布式Alamouti STBC的1×2×4异步协作方案。对这种方案进行理论分析和算法推导,并且重新定义了中继节点归一化后的发射信号幅度。仿真结果表明,该方案的误比特率性能具有明显优势,能在时间异步的协作通信系统中很好地发挥多天线接收性能。
Collaborative diversity technology can effectively improve the capacity and reliability of mobile communication systems. Aimed at time-asynchronous collaborative communication system, a 1 × 2 × 4 asynchronous collaborative scheme based on distributed Alamouti STBC is proposed. The scheme is theoretically analyzed and deduced, and the normalized transmit signal amplitude of the relay node is redefined. The simulation results show that the scheme has obvious advantages of bit error rate performance and can play well the multi-antenna receiving performance in time asynchronous asynchronous communication system.