关键词: 城市街道, Y型模型, 几何随机模型, 信道特征

Abstract: In complex and changeable urban environment, the communication channel is interfered by various obstacles. The model of the vehicle-to-vehicle channel in the intersection scene is built. In this scene, the scatterers are not uniformly distributed. A Y-shaped random model suitable for intersections is proposed. Based on the ellipsoid range limited by the maximum time delay, the geometric random model is established for the vehicle scatterer on the road and the building scatterers beside the road. In this model, the static scatterers on both sides of the road is assumed to be exponentially distributed in the building area, and the moving scatterers are uniformly distributed in the lane area. In order to get close to the real environment, the discrete Markov process is used to simulate the time-varying characteristics of the scatterers. The arrival angle, the delay power spectrum, the time autocorrelation function, the space cross-correlation function, and the Doppler power spectrum density are deduced and simulated. In addition, the random channel model based on geometry has enough generality and can be used to model communication scenes in various urban environments by adjusting channel parameters.

Key words: urban street, Y-shaped scattering model, geometric random model, channel characteristics