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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Highly accurate closed-form approximations to the sum of alpha-mu variates and applications

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Benevides da Costa, Daniel [1] ; Daoud Yacoub, Michel [2] ; Silveira Santos Filho, Jose Candido [2]
Total Authors: 3
[1] Univ Estadual Campinas, Sch Elect & Comp Engn, Dept Commun, BR-13083852 Campinas, SP - Brazil
[2] Univ Estadual Campinas, Sch Elect & Comp Engn, Dept Commun, Wireless Technol Lab WissTek, BR-13083852 Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS; v. 7, n. 9, p. 3301-3306, SEP 2008.
Web of Science Citations: 23

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. (AU)