Improved detection in CDMA for biased sources


We consider the detection of biased information sources in the ubiquitous code-division multiple-access (CDMA) scheme. We propose a simple modification to both the popular single-user matched-filter detector and a recently introduced near-optimal message-passing-based multiuser detector. This modification allows for detecting modulated biased sources directly with no need for source coding. Analytical results and simulations with excellent agreement are provided, demonstrating substantial improvement in bit error rate in comparison with the unmodified detectors and the alternative of source compression. The robustness of error-performance improvement is shown under practical model settings, including bias estimation mismatch and finite-length spreading codes. © 2007 IOP Publishing Ltd.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > Systems analytics research institute (SARI)
Additional Information: © 2007 IOP Publishing Ltd
Uncontrolled Keywords: Mathematical Physics,Physics and Astronomy(all),Statistical and Nonlinear Physics,Modelling and Simulation,Statistics and Probability
Publication ISSN: 1751-8121
Last Modified: 02 Jan 2024 08:11
Date Deposited: 19 Jul 2010 14:25
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
http://iopscien ... 8121/40/33/003/ (Publisher URL)
PURE Output Type: Article
Published Date: 2007-08-17
Authors: Efraim, Hadar
Yacov, Nadav
Shental, Ori
Kanter, Ido
Saad, David (ORCID Profile 0000-0001-9821-2623)



Version: Accepted Version

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