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) η-μ 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-g (Hoyt) are then presented. The derived expressions are valid for integer, as well as for non-integer values of μ. Simulation results demonstrate that the average bit error rate (BER) improves when η and μ increase, whilst the effect of μ is more pronounced than that of η.