Reduced complexity asynchronous multi-user receivers for spread spectrum multiple access.

Type of content
Theses / Dissertations
Publisher's DOI/URI
Thesis discipline
Degree name
Doctor of Philosophy
Publisher
University of Canterbury. Electrical and Electronic Engineering
Journal Title
Journal ISSN
Volume Title
Language
Date
2000
Authors
Skelton, Benjamin C.
Abstract

One of the major problems facing the implementation of multi-user detectors in a mobile radio multiple access environment is the complexity of the receiver structure. This thesis addresses this problem and develops three related receiver structures based on the maximum likelihood multi-user detector. They allow a degradation in performance to be traded for a reduction in the complexity of the receiver. The first family of reduced complexity receivers is derived considering a serial partitioning of the maximum likelihood trellis. A receiver with two degrees of freedom is developed by the application of reduced state sequence estimation (RSSE) techniques to the first receiver. A maximum-ratio combining-like detector with self-noise cancellation is derived for the multi-path fading channel. All three receiver structures allow for significant reductions in complexity with respect to the maximum likelihood detector with only modest performance reductions.

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ANZSRC fields of research
Rights
Copyright Benjamin C. Skelton