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Minimum mean-squared error iterative successive parallel arbitrated decision feedback detectors for DS-CDMA systems

de Lamare, Rodrigo C. and Sampaio-Neto, Raimundo (2008) Minimum mean-squared error iterative successive parallel arbitrated decision feedback detectors for DS-CDMA systems. IEEE Transactions on Communications. pp. 778-789. ISSN 0090-6778

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Abstract

In this paper we propose minimum mean squared error (MMSE) iterative successive parallel arbitrated decision feedback (DF) receivers for direct sequence code division multiple access (DS-CDMA) systems. We describe the MMSE design criterion for DF multiuser detectors along with successive, parallel and iterative interference cancellation structures. A novel efficient DF structure that employs successive cancellation with parallel arbitrated branches and a near-optimal low complexity user ordering algorithm are presented. The proposed DF receiver structure and the ordering algorithm are then combined with iterative cascaded DF stages for mitigating the deleterious effects of error propagation for convolutionally encoded systems with both Viterbi and turbo decoding as well as for uncoded schemes. We mathematically study the relations between the MMSE achieved by the analyzed DF structures, including the novel scheme, with imperfect and perfect feedback. Simulation results for an uplink scenario assess the new iterative DF detectors against linear receivers and evaluate the effects of error propagation of the new cancellation methods against existing ones.

Item Type: Article
Copyright, Publisher and Additional Information: © Copyright 2008 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: DS-CDMA systems, multiuser detection, decision feedback structures, iterative detection, iterative decoding, Computer Networks and Communications, Electrical and Electronic Engineering
Institution: The University of York
Academic Units: The University of York > Electronics (York)
Depositing User: Sherpa Assistant
Date Deposited: 30 May 2008 15:31
Last Modified: 17 Oct 2014 10:33
Published Version: http://dx.doi.org/10.1109/TCOMM.2008.060209
Status: Published
Refereed: Yes
Related URLs:
URI: http://eprints.whiterose.ac.uk/id/eprint/3933

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