高速铁路移动通信系统多天线分集接收方案

在差分调制解调的信号模型下，提出了高铁场景下2种多天线分集接收模型——线性合并分集接收和统计合并分集接收，从而得出高铁场景下车地无线宽带通信较有效的分集接收方案，提升系统性能。数学分析和仿真结果表明，所提出的线性合并分集和统计合并分集都可以通过增加分集数来降低高速移动带来的误码率平层，统计合并分集的性能要优于线性合并分集，但是其接收机复杂度也比线性合并分集要高。在实际应用中可以根据QoS的要求在性能和复杂度之间进行折衷。

Multi-antenna diversity receiving scheme for mobile communication system in high-speed railway

Under the signal model of differential modulation and demodulation, two multi-antenna diversity receptions (linear combiner and statistic combiner) were proposed, and then the effective diversity reception scheme of train-to-ground wireless broadband communication for high-speed railway scenarios was concluded. Mathematical analysis and simulation results indicate that by increasing the diversity number, the proposals can reduce the error floor because of high mobility. The performance of linear combiner is much better than that of statistic combiner, but the receiver complexity of linear combiner is also higher than that of statistic combiner. In term of practical application, the tradeoff between performance and complexity must be made according to the quality of service (QoS) requirements.