General Exact and Accurate Approximate Formulations for the Crossing Rates of Multibranch Diversity Receivers over Non-Identical Correlated Weibull Channels

da Costa, Daniel B.; Yacoub, Michel D.; Santos Filho, J. C. S.

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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.)

General Exact and Accurate Approximate Formulations for the Crossing Rates of Multibranch Diversity Receivers over Non-Identical Correlated Weibull Channels

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Author(s):	da Costa, Daniel B. ^[1] ; Yacoub, Michel D. ^[1] ; Santos Filho, J. C. S. ^[1] Total Authors: 3
Affiliation:	^[1] Univ Estadual Campinas, Sch Elect & Comp Engn, Dept Commun, Wireless Technol Lab WissTek, Campinas, SP - Brazil Total Affiliations: 1
Document type:	Journal article
Source:	IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS; v. 8, n. 3, p. 1188-1193, MAR 2009.
Web of Science Citations:	2
Abstract
General exact expressions for the average level crossing rate (LCR) of multibranch selection (SC), equal-gain (EGC), and maximal-ratio (MRC) combiners operating over nonidentical correlated Weibull fading channels are provided. They are given in terms of finite-range multifold integrals. Our exact formulations generalize those obtained recently in the literature for the dual-branch case. The exact solution requirements are then loosened to allow for simpler accurate approximate expressions. They appear in a fairly simple closed-form fashion, for the SC, and still as multiple integrals, for the EGC and MRC, but with much simpler integrands, which drastically reduces the calculation time. Sample numerical results are discussed by specializing the general expressions to a space-diversity system using three collinear horizontally spaced onmidirectional antennas at the mobile station. (AU)

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