一种高铁场景下的接收机设计方案  

Receiver design scheme in high speed train scenarios

作　　者：施焘 韩雪峰 陈文[1] SHI Tao;HAN Xuefeng;CHEN Wen(Department of Electrical Engineering,Shanghai JiaoTong University,Shanghai 200240,China)

机构地区：[1]上海交通大学电子工程系及上海先进通信与数据科学研究院,上海200240

出　　处：《西安电子科技大学学报》2020年第6期30-36,65,共8页Journal of Xidian University

基　　金：国家重点研发计划(2018YFB1801102);上海市科委(20JC1416502);国家自然科学基金(61671294)。

摘　　要：为了在高铁场景下更好地保障小型用户终端通信的可靠性,在不需要对现有的系统模型进行任何变动的情况下,提出了一种基于非均匀阵列波束成形的抗多普勒频偏接收机设计方案。首先,建立了高铁场景下的信道模型与信号模型,针对用户设备和信号模型的特点,设计了非均匀天线阵列,实现了通过波束成形分离有用信号的目的;然后在此基础上进行频偏处理、信道估计与信号合并,通过对信道估计响应加窗平滑消噪和基于阵列接收信号功率的合并方法,进一步优化系统性能。仿真测试结果表明,该方案在高铁场景下,优于传统的直接接收的方式,为小型用户设备在高铁场景下的信号接收提供了一个更好的方案。In order to better ensure the reliability of small user terminal communications in high-speed train scenarios,an anti-Doppler frequency offset receiver design scheme is proposed based on non-uniform array beamforming and no change to the existing system model.First,the channel model and signal model in the high-speed train scenario is established.According to the characteristics of the user equipment and the signal model,a non-uniform antenna array is designed to separate useful signals by beamforming,on the basis of which frequency offset processing,channel estimation and signal combination are performed.The channel estimation response which is windowed to smooth and reduce noise,and the combination method based on the array received signal power further improve the system performance.Simulation results show that the scheme is better than the traditional direct reception method in the high-speed train scenario and that it is an effective solution for the signal reception of small user equipment in high-speed train scenarios.

关 键 词：高铁场景 非均匀阵列 波束成形 多普勒频偏 信号合并 

分 类 号：TN92[电子电信—通信与信息系统]