An efficient CDMA decoder for correlated information sources

Hadar Efraim, Nadav Yacov, Ori Shental, Ido Kanter

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


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.

Original languageEnglish
Article numberP07039
JournalJournal of Statistical Mechanics: Theory and Experiment
Issue number7
StatePublished - 2009


  • Error correcting codes
  • Message-passing algorithms


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