快速时变场景下非平稳衰落信道建模仿真  

Modeling and simulation of the non-stationary fading channels under fast time-variant environment

作　　者：华博宇 朱秋明[1] 何小祥[1] 毛开 HUA Boyu;ZHU Qiuming;HE Xiaoxiang;MAO Kai(College o f Electronic and Information Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 211106,China)

机构地区：[1]南京航空航天大学电子信息工程学院,江苏南京211106

出　　处：《电信科学》2020年第5期56-64,共9页Telecommunications Science

基　　金：国家重大科研仪器研制项目(No.61827801);国家重大科学仪器设备开发专项(No.2013YQ200607)。

摘　　要：针对高速列车、无人机、车联网等快速时变通信场景下信道呈现非平稳性的问题,提出一种改进的信道建模仿真方法。通过引入积分项和随机偏移,该方法良好再现时变散射环境下的非平稳信道,同时保证各散射支路的独立性。数值仿真结果表明,改进方法模拟的信道统计特性(如概率密度函数、自相关函数和多普勒功率谱密度)与理论值吻合良好。因此,该方法在未来高速移动场景的无线信道建模仿真和通信系统性能评估中具有潜在价值。For solving the problem of non-stationary features in rapid time-varying scenarios, such as high-speed railway, unmanned aerial vehicle and V2 X communication, an improved simulation method for non-stationary fading channels was proposed. Introducing the integral items and random offset, this method can revive non-stationary channels under time-variant scattering scenarios and ensure a smooth transition between two adjacent channel states. Numerical simulations show that simulated statistical properties, such as, the probability density function, auto-correlation function, and Doppler power spectral density have good agreements with the theoretical ones. Thus, this method can be applied for wireless channel modeling and communication system evaluation of future high-speed mobile scenarios.

关 键 词：信道仿真 非平稳信道 时变场景 复谐波叠加 

分 类 号：TN011[电子电信—物理电子学]