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Multiuser detection in TH-UWB communication systems Open Access


Other title
Multiuser detection (Telecommunication)
Ultra-wideband devices
Multichannel communication
Wireless communication systems
Spread spectrum communications
Type of item
Degree grantor
University of Alberta
Author or creator
Hosseini, Iraj
Supervisor and department
Beaulieu, Norman C. (Electrical and Computer Engineering)
Examining committee member and department
Tellambura, Chintha (Electrical and Computer Engineering)
Schmuland, Byron (Mathematical and Statistical Sciences)
Department of Electrical and Computer Engineering

Date accepted
Graduation date
Master of Science
Degree level
Multiple access interference (MAI) in time-hopping (TH) ultra-wideband (UWB) systems is known to be non-Gaussian. Several statistical models have been proposed for the MAI, and based on them various nonlinear single-user receivers have been designed. In this thesis, an accurate mathematical model for the probability density function (PDF) of the MAI in TH-UWB systems is introduced. This model explains important features of the PDF of the MAI, namely impulses, singularities and the behaviour of tails. Using this model, the optimal error rate performance is obtained and the performances of other receivers are benchmarked against it. The single-user conventional matched filter (CMF) receiver is widely used in TH-UWB systems. All the nonlinear single-user receivers apply transformations on the chip correlator outputs of the CMF receiver to detect the transmitted information bit. It is proved that the output of the matched filter in the conventional UWB receiver cannot provide a sufficient decision statistic for detecting the information bits transmitted by the desired user in MAI. Finally, using multiuser detection (MUD) algorithms, several novel multiuser TH-UWB receivers are proposed which outperform all the previous single-user TH-UWB receivers.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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