Advanced Ray-Tracing Saleh-Valenzuela Channel Modelling and Characterization for Indoor Terahertz Communication Systems

With the growing demand for advanced wireless communication networks, there is an urgent need for highspeed wireless technologies. The Terahertz (THz) frequency band, ranging from 0.3 to 10 THz, attracts significant attention due to its unique properties, such as high temporal resolution and low absorption, making it promising for telecom advancements. This paper introduces an ultrawideband (UWB) channel model for THz frequency propagation in indoor environments, starting from 0.3 THz. The study examines the propagation path loss by considering factors such as transmitter size, molecular absorption, and attenuation across varying frequencies and distances. The model includes power delay profiles, MIMO, and DFT-s-OFDM-based channel responses, employing a hybrid approach combining the Saleh-Valenzuela model with Raytracing (RT-SV) techniques. This method provides a detailed analysis of line-of-sight path loss, power distribution, and other physical characteristics in THz indoor channels. The simulation results show that this hybrid model improves THz system performance, outperforming traditional stochastic models by better handling temporal and spatial variations that affect frequency loss.