高铁环境多普勒频移对MIMO信道容量的影响  

Influence of Doppler Frequency Shift on MIMO Channel Capacity in High-speed Rail Environment

作　　者：胡天浩 赵恒凯[1] 汪小勇 郑国莘[1] Hu Tianhao

机构地区：[1]上海大学特种光纤与光接入网重点实验室,特种光纤与先进通信国际合作联合实验室,上海200444 [2]卡斯柯信号有限公司,上海200071

出　　处：《工业控制计算机》2023年第11期24-26,29,共4页Industrial Control Computer

基　　金：上海市自然科学基金(22ZR1422200)。

摘　　要：列车的空间位置和移动速度对多输入多输出(MIMO)通信系统的性能有很大影响。研究高速列车地面典型场景MIMO两径信道容量,发现受多普勒效应影响,信道元素有额外相移。在高速运动中多普勒相位累积可以部分提高MIMO系统的信道容量。仿真结果表明多普勒相位累积后MIMO的信道容量提升比较明显,从信道矩阵条件数的角度也证明了信道容量可以提升。这项研究可为高铁中的5G通信提供参考。The spatial position and moving speed of trains have a great influence on the performance of multiple-input multiple-output(MIMO)communication systems.In this paper,the MIMO two-path channel capacity of a typical scene on the ground of a high-speed train is studied,and it is found that the channel elements have an additional phase shift due to the influence of the Doppler effect.Doppler phase accumulation can partially improve the channel capacity of MIMO systems in high-speed motion.The simulation results show that the channel capacity of MIMO is significantly improved after Doppler phase accumulation,and the channel capacity can be improved from the perspective of the condition number of the channel matrix.This research can provide a reference for 5G communication in high-speed rail.

关 键 词：多普勒频移 高速 MIMO 信道容量 信道模型 

分 类 号：TN929.5[电子电信—通信与信息系统]