Time domain feedback equalizer for fast fading channel in OFDM with scattered pilot

Yutaro Nakagawa, Yukitoshi Sanada

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

    1 Citation (Scopus)

    Abstract

    In this paper, a new feedback equalization scheme to suppress inter-carrier interference (ICI) in an OFDM system using scattered pilot is investigated. On a fast fading channel severe ICI occurs due to a Doppler shift and it deteriorates a bit error rate (BER) seriously because of small subcarrier spacing. In an ISDB-T receiver the equalization is mainly processed in a frequency domain because the scattered pilot is transmitted over the subcarriers. However, the frequency domain equalization may not suppress severe ICI in the case of the fast fading channel with a large Doppler shift. The proposed equalization scheme uses the scattered pilot symbols transformed in a time domain as the reference signal for feedback taps. Numerical results through computer simulation show that the proposed scheme improves the BER performance especially with low carrier-to-noise ratio (CNR) conditions.

    Original languageEnglish
    Title of host publicationISITA/ISSSTA 2010 - 2010 International Symposium on Information Theory and Its Applications
    PublisherIEEE Computer Society
    Pages294-297
    Number of pages4
    ISBN (Print)9781424460175
    DOIs
    Publication statusPublished - 2010 Jan 1

    Publication series

    NameISITA/ISSSTA 2010 - 2010 International Symposium on Information Theory and Its Applications

    ASJC Scopus subject areas

    • Computational Theory and Mathematics
    • Information Systems

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