An Empirical Doubly-Selective Dual-Polarization Vehicular MIMO Channel Model

To optimally design vehicle-to-vehicle (VTV) communication systems, it is necessary to first fully characterize the response of the communications channel. Significant research attention has been focused on describing channels for various scenarios with both analytical and statistical models based on empirical data (empirical models). This paper extends this field by proffering a doubly selective (i.e., time- and frequency-selective) channel for VTV 2x2 multiple input multiple output (MIMO) systems where the pair of transmit and the pair of receive antennas each have orthogonal polarizations. The proposed empirical model is based on collected channel data in an urban setting and is described by a four-basis function Doppler spectrum for each delay tap. For verification, it is demonstrated that the modeled channel closely matches the collected channel data.