Fidelity charts and stopping/termination criteria for iterative multiuser detection

David P. Shepherd, Fredrik Briinnstrom, Mark C. Reed

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    5 Citations (Scopus)

    Abstract

    An iterative multiuser detection (IMUD) receiver is considered for a code-division multiple-access (COMA) system with turbo codes. Fidelity is considered as a metric for convergence analysis and an approximation of fidelity as a function of variance of the log-likelihood ratios is introduced. Fidelity charts are compared with extrinsic information transfer (EXIT) charts as tools for convergence analysis and a close approximation of the relationship between fidelity and mutual information is proposed. We then use this function to approximate a closed form expression for the EXIT function of an interference canceller. Further, we propose a new stopping criterion for the turbo decoder and the IMUD receiver which achieves complexity saving of up to 50% over conventional designs.

    Original languageEnglish
    Title of host publicationTurbo Codes and Related Topics; 6th International ITG-Conference on Source and Channel Coding (TURBOCODING), 2006 4th International Symposium on
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    ISBN (Electronic)9783800729470
    Publication statusPublished - 2006
    Event6th International ITG-Conference on Source and Channel Coding and 2006 4th International Symposium on Turbo Codes and Related Topics, TURBOCODING 2006 - Munich, Germany
    Duration: 3 Apr 20067 Apr 2006

    Publication series

    NameTurbo Codes and Related Topics; 6th International ITG-Conference on Source and Channel Coding (TURBOCODING), 2006 4th International Symposium on

    Conference

    Conference6th International ITG-Conference on Source and Channel Coding and 2006 4th International Symposium on Turbo Codes and Related Topics, TURBOCODING 2006
    Country/TerritoryGermany
    CityMunich
    Period3/04/067/04/06

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