Pairwise Optimization of Modulation Constellations for Non-Uniform Sources
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Authors
Moore, Brendan
Date
2009-10-07T17:36:46Z
Type
thesis
Language
eng
Keyword
Modulation Constellations , Optimization , Non-Uniform Sources , Modulation
Alternative Title
Abstract
The design of two-dimensional signal constellations for the transmission of binary non-uniform memoryless sources over additive white Gaussian noise channels is investigated. The main application of this problem is the implementation of improved constellations where transmitted data is highly non-uniform. A simple algorithm, which optimizes a constellation by re-arranging its points in a pairwise fashion (i.e., two points are modified at a time, with all other points remaining fixed), is presented. In general, the optimized constellations depend on both the source statistics and the signal-to-noise ratio (SNR) in the channel. We show that constellations designed with source statistics considered can yield symbol error rate performance that is substantially better than rectangular quadrature amplitude modulation signal sets used with either Gray mapping or more recently developed maps.
Description
Thesis (Master, Mathematics & Statistics) -- Queen's University, 2009-10-06 22:22:40.096
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This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.