  We introduce the fdRLoS fading model as a natural generalization of the
double-Rayleigh with line-of-sight fading model, on which the
constant-amplitude line-of-sight component is now allowed to randomly
fluctuate. We discuss the key benefits of the fdRLoS fading model here
formulated over the state of the art, and provide an analytical
characterization of its chief probability functions. We analyze the effect of
the fading parameters that define the model, and discuss their impact on the
performance of wireless communication systems.
