A Trajectory-Driven SIMO mm-Wave Channel Model for a Moving Point Scatterer

In this paper, we propose a trajectory-based three-dimensional (3D) non-stationary channel model for a millimeter wave (mm-Wave) single-input multiple-output (SIMO) system. The proposed channel model is designed to capture the mobility of a moving point scatterer in an indoor environment. We derive the expression of the time-variant (TV) channel transfer function (CTF). We study the TV Doppler characteristics of the channel, such as the TV Doppler power spectrum and the TV mean Doppler shift. To validate the proposed channel model, we performed a measurement campaign in an indoor environment using a software defined radar operating at 24 GHz. As a moving object, we consider a single swinging pendulum. The findings demonstrate an excellent agreement between the developed channel model and the real-world measured data. This can serve as a basis for developments of future non-stationary trajectory-driven channel models in the presence of moving objects modelled by multiple point scatterers.