高速移动车车信道建模与系统仿真

发布时间：2018-03-30 11:04

本文选题：车车信道　切入点：嵌入式抽头延迟线模型　出处：《计算机仿真》2014年12期

【摘要】：高速移动的车载环境与传统蜂窝网的无线传输环境相比,主要的不同点在于存在很大的多普勒频移,并且无线电波传输环境、传输路径是不同的,成为智能交通领域影响通信性能的因素。为此提出了嵌入式抽头延迟线模型,采用傅里叶反变换的方法实现符合不同多普勒功率谱密度的瑞利或莱斯分布衰落,用简单抽头延迟线方法拟合每个抽头,最后采用嵌入式抽头延迟线模型实现三种车车信道。通过MATLAB软件完成了三种VTV信道的建模,仿真结果可以反映信道的高速移动性。基于IEEE 802.11p协议搭建了系统仿真环境,仿真结果表明,高速公路相向行驶信道为最恶劣信道,系统误比特率最高,并且误比特率随着数据包长度的增加而增加。
[Abstract]:Compared with the wireless transmission environment of the traditional cellular network, the main difference between the high-speed mobile vehicle environment and the traditional wireless transmission environment is that there is a very large Doppler frequency shift, and the transmission path is different in the radio wave transmission environment. This paper presents an embedded tap delay line model. Fourier inverse transform is used to realize Rayleigh or Rice fading with different Doppler power spectral density. The method of simple tap delay line is used to fit each tap, and the embedded tap delay line model is used to realize three kinds of vehicle channel. The modeling of three VTV channels is completed by MATLAB software. The simulation results can reflect the high-speed mobility of the channel. Based on the IEEE 802.11p protocol, the system simulation environment is built. The simulation results show that the channel is the worst channel and the system bit error rate is the highest. And the bit error rate increases with the increase of packet length.
【作者单位】：上海工程技术大学;南通大学;
【基金】：国家自然科学基金(61201244) 中央财政支持地方高校发展专项资金(车联网车路协同综合实验室建设)
【分类号】：U495

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