Cross-Polarization Discrimination in Vehicle-to-Vehicle Channels: Geometry-Based Statistical Modeling

A new three-dimensional (3-D) geometry-based reference model for cross-polarization discrimination (XPD) is proposed for narrow-band vehicle-to-vehicle (V2V) channels. The model is based on the superposition of polarization components on conservation-of-polarization planes (CoP-planes). This novel approach is used to derive the XPD at each distance. To the best of our knowledge this is the first purely theoretical geometry-based XPD reference model of V2V channels. Using our reference model, we obtain a relationship between XPD and channel modeling factors such as the distance between the transmitter (Tx) and the receiver (Rx), the azimuth/elevation angles of arrival and departure (A/E-AoA and A/E-AoD), multipath delays, and the distribution of scatterers. The proposed XPD reference model for V2V channels is based on and extended from our previous XPD reference model for fixed-to-fixed/mobile(F2F/F2M) channels. Our analytical XPD model reveals valuable XPD properties that expose the potential of utilizing polarization diversity in V2V communication systems.