A mean field theory of coded CDMA systems


We present a mean field theory of code-division multiple access (CDMA) systems with error-control coding. On the basis of the relation between the free energy and mutual information, we obtain an analytical expression of the maximum spectral efficiency of the coded CDMA system, from which a mean field description of the coded CDMA system is provided in terms of a bank of scalar Gaussian channels whose variances in general vary at different code symbol positions. Regular low-density parity-check (LDPC)-coded CDMA systems are also discussed as an example of the coded CDMA systems.

Publication DOI: https://doi.org/10.1088/1751-8113/41/32/324022
Divisions: College of Engineering & Physical Sciences > School of Informatics and Digital Engineering > Mathematics
College of Engineering & Physical Sciences > Systems analytics research institute (SARI)
Additional Information: © 2008 IOP Publishing Ltd.
Uncontrolled Keywords: mean field theory,code-division multiple-access systems,error-control coding,free energy,mutual information,maximum spectral efficiency,mean-field description,bank of scalar Gaussian channels,regular low-density parity-check-coded CDMA systems,Mathematical Physics,Physics and Astronomy(all),Statistical and Nonlinear Physics,Modelling and Simulation,Statistics and Probability
Publication ISSN: 0305-4470
Full Text Link: http://iopscien ... 1/41/32/324022/
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2008-07-30
Authors: Yano, Toru
Tanaka, Toshiyuki
Saad, David (ORCID Profile 0000-0001-9821-2623)

Export / Share Citation


Additional statistics for this record