Polarized Channel Model for Body Area Networks Using Reflection Coefficients

Abstract

A geometry-based propagation model is proposed for wideband polarized body area network (BAN) channels. Reflection coefficient functions ( $\Gamma$ -functions) are derived as a function of geometry-based channel modeling parameters for more precise modeling of polarized BAN channels than existing polarized channel models, which exclude the reflection coefficients or use constant-valued reflection coefficients. Conservation-of-polarization (CoP) propagation planes along with geometrical $\Gamma$ -functions, which we call the CoP - ${\mit\Gamma} $ plane methodology , are used to derive the channel polarization functions. Statistical characteristics of polarized BAN channels such as the cross-polarization discrimination (XPD) and time–frequency correlation function (TF-CF) are provided based on this new CoP- $\Gamma$ plane methodology. The model is validated with measurement data taken at 13 GHz and shown to be in excellent agreement.