铁道学报
鐵道學報
철도학보
Journal of the China Railway Society
2015年
9期
69-74
,共6页
酉空时调制%高速铁路%非相干接收%信道相关性%移动速度
酉空時調製%高速鐵路%非相榦接收%信道相關性%移動速度
유공시조제%고속철로%비상간접수%신도상관성%이동속도
USTM%high-speed railway%non-coherent receiver%channel correlation%velocity
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。
在多天線繫統中,酉空時調製技術由于接收耑不需要知道信道狀態信息而適用于高鐵車地通信。本文研究高鐵場景下酉空時調製的最優非相榦接收機的錯誤性能,接收耑需要估計信道相關性信息。由于高速列車運行速度信息比信道相關性信息更易穫取,提齣一種僅利用速度信息的簡化的非相榦接收機,併推導齣成對錯誤概率的理論錶達式。分析及倣真結果錶明,簡化的非相榦接收機的錯誤性能接近最優非相榦接收機。
재다천선계통중,유공시조제기술유우접수단불수요지도신도상태신식이괄용우고철차지통신。본문연구고철장경하유공시조제적최우비상간접수궤적착오성능,접수단수요고계신도상관성신식。유우고속열차운행속도신식비신도상관성신식경역획취,제출일충부이용속도신식적간화적비상간접수궤,병추도출성대착오개솔적이론표체식。분석급방진결과표명,간화적비상간접수궤적착오성능접근최우비상간접수궤。
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.