Improved detection in CDMA for biased sources

Efraim, Hadar; Yacov, Nadav; Shental, Ori; Kanter, Ido and Saad, David (2007). Improved detection in CDMA for biased sources. Journal of Physics A: Mathematical and Theoretical, 40 (33), pp. 9977-9985.

Abstract

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: https://doi.org/10.1088/1751-8113/40/33/003
Divisions: Engineering & Applied Sciences > Mathematics
Additional Information: © 2007 IOP Publishing Ltd
Uncontrolled Keywords: Mathematical Physics,Physics and Astronomy(all),Statistical and Nonlinear Physics,Modelling and Simulation,Statistics and Probability
Published Date: 2007-08-17

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