A novel cross coding scheme for OFDM systems

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    In wireless OFDM-based systems, coding jointly over all the sub-carriers simultaneously performs better than coding separately per sub-carrier. However, the joint coding is not always optimal. In this paper, we propose a novel coding scheme based on fountain codes, which combines the separate coding and the joint coding over all the sub-carriers. The key element in the new proposed system is that each fountain-encoded packet is transmitted over a single sub-carrier. The packets can be discarded if they have encountered a low-energy channel. Fountain codes can recover the source data by using only the surviving packets. With this new approach, we have a gain of around 8.5 dB comparing to the FEC layer used in current WLAN standards (i.e. the IEEE 802.11a standard and the IEEE 802.11n standard).
    Original languageUndefined
    Title of host publicationIEEE Information Theory Workshop, 2009. ITW 2009.
    Place of PublicationLos Alamitos
    PublisherIEEE Computer Society
    Number of pages5
    ISBN (Print)978-1-4244-4982-8
    Publication statusPublished - 11 Oct 2009
    EventIEEE Information Theory Workshop, ITW 2009 - Taormina, Italy
    Duration: 11 Oct 200916 Oct 2009

    Publication series

    PublisherIEEE Computer Society Press


    WorkshopIEEE Information Theory Workshop, ITW 2009
    OtherOctober 11-16, 2009


    • METIS-265784
    • EWI-17396
    • IR-69845

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