NDLI: Generalized Moment Matching for the Linear Combination of Lognormal RVs - Application to Outage Analysis in Wireless Systems

Content Provider	IEEE Xplore Digital Library
Author	Pratesi, M. Santucci, F. Graziosi, F.
Copyright Year	2006
Description	Author affiliation: Dept. of Electr. Eng., L'Aquila Univ. (Pratesi, M.; Santucci, F.; Graziosi, F.)
Abstract	Moving from the need for a simple and versatile method for outage computation in various contexts of interest in wireless communications, in this paper we propose a lognormal approximation for the linear combination of a set of lognormal random variables (RV) with one-sided random weights. The approximation is based on a generalization of the well known moment matching approximation (MMA) for the sum of lognormal RVs, and it allows quite simple handling of the power sum of interfering signals even in rather complicated scenarios. Specifically, composite multiplicative channel models with unequal parameters can be handled, and generic (unequal) correlation patterns for some channel components can be handled with reference to any pair of signals. At this stage of the computation, only moments of the random weights are required. The probability density function of the random weight for the useful signal component may be required in computing outage probability, and numerical methods may be only required to solve a single integral at this second stage. The suitability of the approximation is examined by evaluating outage performance for various values of system parameters in the context of interest of composite Nakagami-lognormal channels in reuse-based systems
Sponsorship	IEEE COM
Starting Page	1
Ending Page	5
File Size	158430
Page Count	5
File Format	PDF
ISBN	1424403294
DOI	10.1109/PIMRC.2006.254250
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-09-11
Publisher Place	Finland
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Fading Probability Statistics Context Wireless communication Multiple access interference Narrowband Shadow mapping Land mobile radio Mobile communication
Content Type	Text
Resource Type	Article

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