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Type: Artigo de periódico
Title: Highly accurate closed-form approximations to the sum of alpha-mu variates and applications
Author: da Costa, DB
Yacoub, MD
Santos, JC
Abstract: Sums of fading envelopes occur in several wireless communications applications, such as equal-gain combining, signal detection, outage probability, intersymbol interference, etc. The exact evaluation of the sum statistics is known to be very intricate. One of the purposes of this Letter is to provide highly accurate closed-form approximations to the probability density function and cumulative distribution function of the sum of independent identically distributed (i.i.d.) alpha-mu (generalized gamma) variates. Based on and as an extension of such an approach, simple precise approximations for the performance metrics of equal-gain combining and maximal-ratio combining receivers operating on i.i.d. alpha-mu fading channels are proposed. Samples examples are given to illustrate that, for practical purposes, exact and approximate solutions are indistinguishable from each other.
Subject: approximation methods
diversity systems
generalized fading channels
moment-based estimators
performance analysis
alpha-mu sums
Country: EUA
Editor: Ieee-inst Electrical Electronics Engineers Inc
Citation: Ieee Transactions On Wireless Communications. Ieee-inst Electrical Electronics Engineers Inc, v. 7, n. 9, n. 3301, n. 3306, 2008.
Rights: fechado
Identifier DOI: 10.1109/TWC.2008.070336
Date Issue: 2008
Appears in Collections:Unicamp - Artigos e Outros Documentos

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