Paper Info
Title
Designing Time-Hopping Ultrawide Bandwidth Receivers for Multiuser Interference Environments
Abstract
The multiple-user interference (MUI) in time- hopped impulse-radio ultra-wide bandwidth (UWB) systems is impulse-like and poorly approximated by a Gaussian distribution. Therefore, conventional matched filter receiver designs, w hich are optimal for Gaussian noise, are not fully efficient for UW B applications. Several alternative distributions for approximating the MUI process and the MUI-plus-noise process in UWB systems are motivated and compared. These distributions have in common that they are more impulsive than the Gaussian approximation, with a greater area in the tails of the probability density fu nction (pdf) compared to a Gaussian pdf. The improved MUI and MUI- plus-noise models are utilized to derive new receiver designs for UWB applications, which are shown to be superior to the conventional matched filter receiver. Multipath propagation is abundant in UWB channels and is exploited by a Rake receiver. A Rake receiver uses multiple fingers to comb the multipath rays with a conventional matche d filter implemented in each finger. Rake structures utilizing the new receiver designs that are suitable for reception of UWB signals in multipath fading channels are provided. An optimal performance benchmark, based on an accurate theoretical model for the interference which fully explains the features of th e MUI pdf, is also presented. Analysis and simulation results are shown for the novel receivers which demonstrate that the new designs have superior performance compared to the conventional linear receiver when MUI is significant. Several adaptive re ceivers are shown to always match or exceed the performance of the conventional linear receiver in all MUI-plus-noise environments. Parameter estimation for the new receivers also is discussed. Index Terms—Demodulation, digital receivers, error rate, multiple-access interference (MAI), multiuser interference (MUI), Rake receiver, receiver design, ultra-wide bandwidth (UWB).
Year
DOI
Venue
2009
10.1109/JPROC.2008.2008782
Proceedings of the IEEE
Keywords
Field
DocType
Gaussian distribution,Gaussian noise,fading channels,interference (signal),matched filters,multipath channels,parameter estimation,radio receivers,ultra wideband communication,Gaussian distribution,Gaussian noise,Rake receiver,adaptive receivers,linear receiver,matched filter receiver,multipath fading channels,multipath propagation,multiuser interference environments,parameter estimation,probability density function,time-hopping ultrawide bandwidth receivers,Demodulation,Rake receiver,digital receivers,error rate,multiple-access interference (MAI),multiuser interference (MUI),receiver design,ultra-wide bandwidth (UWB)
Multipath propagation,Rake,Demodulation,Rake receiver,Fading,Electronic engineering,Ultra-wideband,Engineering,Matched filter,Gaussian noise
Journal
Volume
Issue
ISSN
97
2
0018-9219
Citations 
PageRank 
References 
37
1.83
43
Authors
2
Name
Order
Citations
PageRank
Norman C. Beaulieu12372285.49
David J. Young216132.05