中文摘要：

在多天线系统中,酉空时调制技术由于接收端不需要知道信道状态信息而适用于高铁车地通信.本文研究高铁场景下酉空时调制的最优非相干接收机的错误性能,接收端需要估计信道相关性信息.由于高速列车运行速度信息比信道相关性信息更易获取,提出一种仅利用速度信息的简化的非相干接收机,并推导出成对错误概率的理论表达式.分析及仿真结果表明,简化的非相干接收机的错误性能接近最优非相干接收机.

英文摘要：

Under the multi-antenna system,the Unitary Space-Time Modulation (USTM)technology was suit-able for train-wayside communication under the high-speed railway scenario,as the technology did not require the receiver to know the real-time channel state information (CSI).In this paper,the error-rate performance of the optimal non-coherent receiver in the high-speed railway scenario was investigated,where the receiver nee-ded the channel correlation information.Due to the fact that the information on the velocity of the train is more accessible than the information of the channel correlation,a simplified non-coherent receiver that only made use of the velocity information was proposed.Furthermore,the theoretical expression of pair-wise error probability (PEP)was derived.Analysis and simulation results showed that the error-rate performance of the proposed simplified non-coherent receiver was very close to that of the optimal receiver.