  We present a composite wireless fading model encompassing multipath fading
and shadowing based on fluctuating two-ray (FTR) fading and inverse gamma (IG)
shadowing. We first determine an alternative framework for the statistical
characterization and performance evaluation of the FTR fading model, which is
based on the fact that the FTR fading distribution can be described as an
underlying Rician Shadowed (RS) distribution with continuously varying
parameter Kr (ratio of specular to diffuse components). We demonstrate that
this new formulation permits to obtain a closed-form expression of the
generalized moment generating function (GMGF) of the FTR model, from which the
PDF and CDF of the composite IG/FTR model can be obtained in closed-form. The
exact and asymptotic outage probability of the IG/FTR model are analyzed and
verified by Monte Carlo simulations.
