Spatial Modulation Performance Analysis over Generalized η - μ Fading Channels

In this paper, we analyze and evaluate the performance of spatial modulation (SM) systems that operate over independent and identically distributed (i.i.d) eta-mu fading channels. More specifically, a closed-form expression in terms of Appell's hypergeometric function for the pairwise error probability (PEP) is derived. Furthermore, simplifications for some special fading distributions such as Nakagami-m, Rayleigh, and Nakagami-q (Hoyt) are then presented. The derived expressions are valid for integer, as well as for non-integer values of mu. Simulation results demonstrate that the average bit error rate (BER) improves when eta and mu increase, whilst the effect of mu is more pronounced than that of eta.