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Multiuser detection in fast-fading multipath environments

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Title: Multiuser detection in fast-fading multipath environments
Author: Sayeed, Akbar M.; Aazhang, Behnaam
Type: Journal Paper
Keywords: Doppler; fast fading; multipath; multiuser detection; RAKE receiver
Citation: A. M. Sayeed and B. Aazhang, "Multiuser detection in fast-fading multipath environments," IEEE Journal in Selected Areas in Communication, vol. 16, no. 9, pp. 1691-1701, 2001.
Abstract: We propose a new framework for multiuser detection in fast-fading channels that are encountered in many mobile communication scenarios. Existing multiuser RAKE receivers, developed to combat multipath fading and multiuser interference in slow fading, suffer substantial degradation in performance under fast fading due to errors in channel state estimation. The detectors proposed in this paper employ a novel receiver structure based on time-frequency (TF) processing that is dictated by a canonical representation of the wide-sense stationary uncorrelated scatterer (WSSUS) channel model. The workhorse of the framework is a TF generalization of the RAKE receiver that exploits joint multipath-Doppler diversity. Analytical and simulated results based on realistic fast-fading assumptions demonstrate that the proposed multiuser detectors promise substantially improved performance compared to existing systems due to the inherently higher level of diversity afforded by multipath-Doppler processing.
Date Published: 2001-10-20

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    Publications by Rice Faculty and graduate students in multimedia communications