An efficient CDMA decoder for correlated information sources

Details An efficient CDMA decoder for correlated information sources An efficient CDMA decoder for correlated information sources

2010-01-28

arxiv.org/abs/1001.5135v1

J. Stat. Mech. (2009) P07039

Computer Science

Information Theory

11 pages

Scientific paper

10.1088/1742-5468/2009/07/P07039

We consider the detection of correlated information sources in the ubiquitous Code-Division Multiple-Access (CDMA) scheme. We propose a message-passing based scheme for detecting correlated sources directly, with no need for source coding. The detection is done simultaneously over a block of transmitted binary symbols (word). Simulation results are provided demonstrating a substantial improvement in bit-error-rate in comparison with the unmodified detector and the alternative of source compression. The robustness of the error-performance improvement is shown under practical model settings, including wrong estimation of the generating Markov transition matrix and finite-length spreading codes.

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