Unified analysis of transmit, receive and hybrid diversity techniques over generalized-K channels

In this work, unified performance analysis of various transmit, receive and hybrid diversity techniques are studied over generalised-K composite fading channels. Of transmit diversity techniques, orthogonal space-time block coding, maximal-ratio transmission and transmit antenna selection techniques are investigated. On the other hand, maximal-ratio combining and selection combining are examined as receive antenna diversity techniques. In this paper, 10 different multi-antenna techniques have been analyzed. Exact outage probability, symbol error probability, moment generating function, moments and ergodic capacity expressions are derived in closed-form. Asymptotic expressions are also derived in order to provide deeper insight by obtaining array and diversity gains of the studied multi-antenna scenarios. Simulations verify theoretical results. We show that the diversity orders of the investigated scenarios are the minimum of the diversity orders of the system for only small-scale fading channel case and the shadowing parameter, and limited by the shadowing effect especially in heavy shadowing case. Copyright (c) 2015 John Wiley & Sons, Ltd.