Proceedings Article10.1109/VETEC.1997.596347
Multiuser diversity receivers for frequency-selective Rayleigh fading CDMA channels
Xiaodong Wang,H.V. Poor +1 more
- 04 May 1997
- Vol. 1, pp 198-202
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TL;DR: Two suboptimal schemes for joint channel estimation and symbol detection are developed, namely, the decision-directed symbol-by-symbol detection and the per-survivor sequence detection.
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Abstract: Adaptive receiver structures for coherent and differentially coherent multiuser detection with diversity combining in the frequency-selective Rayleigh fading CDMA channels are proposed. The receiver employs a recursive-least-squares (RLS) multipath MMSE filter-bank as the front-end to mitigate the multiple-access interference and the multipath interference. Two suboptimal schemes for joint channel estimation and symbol detection are developed, namely, the decision-directed symbol-by-symbol detection and the per-survivor sequence detection. A differentially coherent detection scheme is also considered. Finally, the performance of these adaptive detectors are assessed by simulations. A salient feature of the adaptive receivers proposed is that their implementations can be mapped to VLSI systolic arrays to exploit massively parallel signal processing computation.
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Citations
Multiuser demodulation for DS-CDMA systems in fading channels
Markku Juntti
- 01 Jan 1997
TL;DR: It is shown that the FIR detectors can be made near-far resistant under a given ratio between maximum and minimum received power of users by selecting an appropriate memory-length, and the iterative detectors are also shown to be applicable for parallel implementation.
Advanced CDMA for Wireless Communications
Markku Juntti,Savo Glisic +1 more
- 01 Jan 1997
TL;DR: Some selected topics currently being subject of extensive research for applications in future code-division multiple-access (CDMA) networks are reviewed and a comprehensive review of the multiuser demodulation theory and technology is presented.
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Overview of multiuser detection/interference cancellation for DS-CDMA
T. Ojanpera
- 17 Dec 1997
TL;DR: An overview of developments in the field of multiuser detection for DS-CDMA is presented and possible future research directions are suggested.
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Extended MMSE receiver for multiuser interference rejection in multipath DS-CDMA channels
Frederik Petre,M. Engels,Andre Bourdoux,Bert Gyselinckx,Marc Moonen,H. De Man +5 more
- 01 Jan 1999
TL;DR: An extended MMSE receiver which spans three symbol intervals the desired symbol interval as well as the previous and the next symbol interval so as to allow a low-complexity low-power implementation in the mobile user-terminal for communication over multipath slow fading channels in the forward link.
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•Dissertation
Linear MMSE Receivers for Interference Suppression & Multipath Diversity Combining in Long-Code DS-CDMA Systems
Arash Mirbagheri
- 01 Jan 2003
TL;DR: The proposed LMMSE receiver addresses two drawbacks of the coherent Rake receiver, the industry’s current solution for multipath reception, and harnesses the energy of all paths of the desired user that fall within its time support, at no additional complexity.
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References
•Book
Digital Communications
John G. Proakis
- 01 Jan 1983
TL;DR: This month's guest columnist, Steve Bible, N7HPR, is completing a master’s degree in computer science at the Naval Postgraduate School in Monterey, California, and his research area closely follows his interest in amateur radio.
27.7K
A multiuser receiver for code division multiple access communications over multipath channels
U. Fawer,Behnaam Aazhang +1 more
TL;DR: The results indicate that the estimator of the channel coefficients has a variance close to the Cramer-Rao lower bound, and that the proposed multiuser detector is capable of eliminating the near-far effect as well as processing the signals propagated through multiple paths.
Multiuser detectors for synchronous CDMA communication over non-selective Rician fading channels
TL;DR: The asymptotic efficiencies of multiuser detectors designed for the Gaussian channel when employed over the Rician fading channel are obtained, thereby quantifying the loss in performance incurred by these mismatched detectors.
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Coherent and differentially coherent multiuser detectors for asynchronous CDMA frequency-selective channels
Zoran Zvonar,David J. Brady +1 more
- 11 Oct 1992
TL;DR: Low-complexity coherent and differentially coherent multiuser detectors are analyzed for an asynchronous CDMA frequency-selective Rayleigh fading channel in which a central receiver has knowledge of the signature waveforms of all users.
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