Effect of pulse shaping filters on a fractional sampling OFDM system with subcarrier-based maximal ratio combining

Mamiko Inamori, Takashi Kawai, Tatsuya Kobayashi, Haruki Nishimura, Yukitoshi Sanada

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    In this paper, the effect of the impulse response of pulse shaping filters on a fractional sampling orthogonal frequency division multiplexing (FS OFDM) system is investigated. FS achieves path diversity with a single antenna through oversampling and subcarrier-based maximal ratio combining (MRC). Though the oversampling increases diversity order, correlation among noise components may deteriorate bit error rate (BER) performance. To clarify the relationship between the impulse response of the pulse shaping filter and the BER performance, five different pulse shaping filters are evaluated in the FS OFDM system. Numerical results of computer simulations show that the Frobenius norm of a whitening matrix corresponding to the pulse shaping filter has significant effect on the BER performance especially with a small numbers of subcarriers. It is also shown that metric adjustment based on the Frobenius norm improves BER performance of the coded FS OFDM system.

    Original languageEnglish
    Pages (from-to)1484-1494
    Number of pages11
    JournalIEICE Transactions on Communications
    VolumeE92-B
    Issue number5
    DOIs
    Publication statusPublished - 2009 May

    Keywords

    • Diversity
    • Fractional sampling
    • OFDM
    • Pulse shaping filter

    ASJC Scopus subject areas

    • Software
    • Computer Networks and Communications
    • Electrical and Electronic Engineering

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