Análise de Desempenho Assintótica das Técnicas EGC e SC com Múltiplos Ramos sob Desvanecimento Generalizado

Francisco Raimundo Albuquerque Parente, Flavio P. Calmon, José Cândido Silveira Santos Filho

DOI: 10.14209/SBRT.2020.1570661643

Evento: XXXVIII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais (SBrT2020)

Keywords: Asymptotic performance analysis Equal-gain combining Fading channels Selection combining

Abstract

In wireless communications systems, the performance analysis of diversity techniques is commonly based on essential metrics such as symbol-error rate and outage probability. Under generalized fading channels, these metrics have an exact analytical formulation that is quite complicated, if not unfeasible, which has motivated the search for simpler approximate solutions. In this work, it is proposed an asymptotic performance analysis of two multibranch combining techniques subject to generalized fading, namely, equal-gain combining and selection combining. Asymptotic closed-form expressions are obtained, providing a clear understanding of the system performance in terms of physical parameters for the high signal-to-noise ratio regime. The analysis is illustrated with representative numerical results and an insightful discussion, revealing how each fading parameter impacts the two combining techniques under study.

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