In this paper, we proposed a novel efficient method of analyzing the ergodic channel capacity of thecooperative amplify-and-forward (CAF) relay system. This is accomplished by employing a very tightapproximate moment generating function (MGF) of end-to-end signal-to-noise ratio of 2-hop multi-relaysystem, which is In this paper, we proposed a novel efficient method of analyzing the ergodic channelcapacity of the cooperative amplify-and-forward (CAF) relay system. This is accomplished by employing avery tight approximate moment applicable to myriad of fading environments including mixed andcomposite fading channels. Three distinct adaptive source transmission policies were considered in ouranalysis namely: (i) constant power with optimal rate adaptation (ORA); (ii) optimal joint power and rateadaptation (OPRA); and (iii) fixed rate with truncated channel inversion (TCIFR). The proposed framework based on the novel approximate MGF method is sufficiently general to encapsulate all types of fadingenvironments (especially for the analysis of the mixed fading case)and provides significant advantage tomodel wireless system for mixed and composite fading channel. In addition to simplifying computationcomplexity of ergodic capacity for CAF relaying schemes treated in literature, we also derive closed formexpressions for the above three adaptive source transmission policies under Nakagami-m fading with i.n.dstatistics. The accuracy of our proposed method has been validated with existing MGF expressions that arereadily available for specific fading environments in terms of bounds, and via Monte Carlo simulations.
展开▼
