Novel Multi-Mobility V2X Channel Model in the Presence of Randomly Moving Clusters

• Published in: IEEE transactions on wireless communications Vol. 20; no. 5; pp. 3180 - 3195
• Main Authors: Xiong, Baiping, Zhang, Zaichen, Zhang, Jiangfan, Jiang, Hao, Dang, Jian, Wu, Liang
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.05.2021; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Acceleration; Channel models; Channels; Clusters; Communication; Computational modeling; Intelligent vehicles; MIMO communication; Non-stationary V2X channel model; Random walk; random walk process; Scattering; statistical properties; Terminals; time-varying Doppler frequency; Trajectory; Vehicle-to-everything; velocity variations; Wideband; Wireless communication
• ISSN: 1536-1276; 1558-2248
• DOI: 10.1109/TWC.2020.3047957

Considering mobile terminals with time-varying velocities and randomly moving clusters, a novel multi-mobility non-stationary wideband multiple-input multiple-output (MIMO) channel model for future intelligent vehicle-to-everything (V2X) communications is proposed. To describe the non-stationarity of multi-mobility V2X channels, the proposed model employs a time-varying acceleration model and a random walk process to describe the motion of the communication terminals and that of the scattering clusters, respectively. The evolution of the model parameters over time and the stochastic characteristics of the phase shift caused by the time-varying Doppler frequency are derived. The proposed model is sufficiently general and suitable for characterizing various V2X communication scenarios. Under two-dimensional (2D) non-isotropic scattering scenarios, the important channel statistical properties of the proposed model are derived and thoroughly investigated. The impact of the random walk process of the clusters and the velocity variations of the communication terminals on these statistical properties is studied. The simulation results verify that the proposed model is useful for characterizing V2X channels.