An Efficient FFT For OFDM Based Cognitive Radio On A Reconfigurable Architecture

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    Abstract

    Cognitive Radio is a promising technology to utilize non-used parts of the spectrum that actually are assigned to licensed services. An adaptive OFDM based Cognitive Radio system has the capacity to nullify individual carriers to avoid interference to the licensed user. Therefore, there could be a considerably large number of zero-valued inputs/outputs for the IFFT/FFT in the OFDM transceiver. Due to the wasted operations on zero values, the standard FFT is no longer efficient. Based on this observation, we propose to use a computationally efficient IFFT/FFT as an option for OFDM based Cognitive Radio. Mapping this algorithm onto a reconfigurable architecture is discussed.
    Original languageUndefined
    Title of host publicationIEEE International Conference on Communications 2007 Cognet Workshop
    Place of PublicationGlasgow
    PublisherIEEE Communications Society
    Pages6522-6526
    Number of pages5
    ISBN (Print)1-4244-0353-7
    DOIs
    Publication statusPublished - 24 Jun 2007
    EventFirst IEEE CogNet Workshop, CogNet@ICC 2007: Towards Cognition in Wireless Networks - Glasgow, United Kingdom
    Duration: 24 Jun 200724 Jun 2007
    Conference number: 1

    Publication series

    Name
    PublisherIEEE Communication Society

    Conference

    ConferenceFirst IEEE CogNet Workshop, CogNet@ICC 2007
    Abbreviated titleCogNet@ICC
    CountryUnited Kingdom
    CityGlasgow
    Period24/06/0724/06/07

    Keywords

    • EWI-9550
    • METIS-242161
    • IR-67024

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