Three-dimensional dynamic channel modeling and tracking for terahertz band indoor communications

Abstract

Terahertz (0.06–10 THz) band serves as a promising technology to accommodate the exponential increase in data rates and number of connected devices. The THz band propagation is greatly affected by channel variations. In this paper, a novel and accurate approach is developed for time-varying channel modeling and tracking for the THz indoor communications. In particular, a three-dimensional time-varying THz channel model that captures the peculiarities in propagation parameters is presented. Moreover, based on the THz channel characteristics, an extended Kalman filtering approach is proposed to accurately track the line-of-sight component along time variation. Additionally, the proposed channel modeling and tracking approach under a realistic access-point-to-user-equipment link scenario in an office environment is evaluated in detail. Based on the simulation results validated from ray-tracing techniques, the proposed time-varying channel model yields satisfying system capacity.