Theoretical analysis of propagation characteristics in millimeter-wave intervehicle communication system

The paper presents an analysis of the multipath propagation characteristics of an intervehicle high-speed radio communication system using the ray-tracing method. A model of the millimeter-wave intervehicle propagation path accounting for vehicle traffic was developed and used to study the delay profile, while varying the distribution of the reception power and other multipath propagation characteristics. In the case of digital signal transmission between the vehicles, the probability density function of the carrier-to-noise power ratio (CNR) was determined and a theoretical analysis of the average bit error rate was performed by modeling the intervehicle propagation path using a Rice fading channel. By performing a numerical simulation, close relationships were established between the transmission power necessary to provide the required average bit error rate, the maximum transmission rate, the vehicle traffic, and the size of the antenna. A study of the improved signal propagation characteristics obtained by using diversity reception was also performed. It was found that by reducing the fading effect, an improvement in signal propagation characteristics can be expected.