Effect of limited number of retransmissions of RCPT hybrid ARQ for DS-CDMA mobile radio

Deepshikha Garg, Ryohei Kimura, Fumiyuki Adachi

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    5 Citations (Scopus)

    Abstract

    In this paper, we evaluate by computer simulations the signal energy per information bit (Eb/N0) for rate compatible punctured turbo (RCPT) coded hybrid ARQ for direct sequence code division multiple access (DS-CDMA) with antenna diversity reception and Rake combining in a frequency selective Rayleigh fading channel when the number of allowable retransmissions is limited. When the number of allowable retransmissions is unlimited, transmitting minimum amount of redundancy bits with each retransmission would result in the highest throughput as unnecessary redundancy is avoided. However in a practical system, the number of retransmissions allowed is limited to avoid unacceptable time delay before the successful transmission of a packet. When the number of retransmissions is limited, residual bit error is produced. In this paper, we consider different RCPT Hybrid ARQ schemes with limited number of retransmissions. It is found that the type II hybrid ARQ scheme is the most favorable in terms of required Eb/N0 for a given bit error rate (BER), while the type I hybrid ARQ scheme, is the most favorable for delay sensitive systems. For the type II hybrid ARQ schemes, the minimum required Eb/N0 is attained after all the parity bits are transmitted and hence depends on the puncturing period.

    Original languageEnglish
    Title of host publication5th International Symposium on Wireless Personal Multimedia Communications, WPMC 2002 - Proceedings
    PublisherIEEE Computer Society
    Pages971-975
    Number of pages5
    ISBN (Electronic)0780374428
    DOIs
    Publication statusPublished - 2002
    Event5th International Symposium on Wireless Personal Multimedia Communications, WPMC 2002 - Honolulu, United States
    Duration: 2002 Oct 272002 Oct 30

    Publication series

    NameInternational Symposium on Wireless Personal Multimedia Communications, WPMC
    Volume3
    ISSN (Print)1347-6890

    Other

    Other5th International Symposium on Wireless Personal Multimedia Communications, WPMC 2002
    Country/TerritoryUnited States
    CityHonolulu
    Period02/10/2702/10/30

    Keywords

    • Frequency selective channel
    • Hybrid ARQ
    • Mobile communication
    • Rate compatible punctured turbo codes

    ASJC Scopus subject areas

    • Computer Networks and Communications
    • Computer Science Applications
    • Human-Computer Interaction

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