An SBR Based Ray Tracing Channel Modeling Method for THz and Massive MIMO Communications

TL;DR

This paper presents an SBR-based ray tracing method integrated with acceleration techniques for modeling THz and massive MIMO channels, demonstrating its accuracy and applicability for 6G communication system design.

Contribution

It introduces a modified SBR ray tracing approach incorporating material and atmospheric effects for THz and MIMO channels, validated against commercial software and measurements.

Findings

Ray tracing results agree with Wireless Insite simulations.

Modified models match measured propagation characteristics.

SBR method effectively models THz and MIMO channels with good accuracy.

Abstract

Terahertz (THz) communication and the application of massive multiple-input multiple-output (MIMO) technology have been proved significant for the sixth generation (6G) communication systems, and have gained global interests. In this paper, we employ the shooting and bouncing ray (SBR) method integrated with acceleration technology to model THz and massive MIMO channel. The results of ray tracing (RT) simulation in this paper, i.e., angle of departure (AoD), angle of arrival (AoA), and power delay profile (PDP) under the frequency band supported by the commercial RT software Wireless Insite (WI) are in agreement with those produced by WI. Based on the Kirchhoff scattering effect on material surfaces and atmospheric absorption loss showing at THz frequency band, the modified propagation models of Fresnel reflection coefficients and free-space attenuation are consistent with the measured results. For massive MIMO, the channel capacity and the stochastic power distribution are analyzed. The results indicate the applicability of SBR method for building deterministic models of THz and massive MIMO channels with extensive functions and acceptable accuracy.