Subcarrier weighting scheme in OFDM receiver with ΣΔ A/D converter on multipath fading channels

Ayana Suzuki, Mamiko Inamori, Yukitoshi Sanada

    研究成果: Conference contribution

    1 被引用数 (Scopus)

    抄録

    In OFDM receivers, an analog-to-digital converter must convert a signal with large bandwidth and high resolution. A ΣΔ modulator is a type of A/D converters that has very high resolution. However, it has lower bandwidth than the other types of A/D converters because the quantization noise of the ΣΔ modulator increases in high frequency. Moreover, the oversampling rate of the ΣΔ modulator needs to be decreased for reduction of power consumption. In this paper, performance of an OFDM receiver with the ΣΔ modulator using a subcarrier weighting scheme is investigated. The symbol weighting scheme is used with a soft-decision Viterbi decoder in the receiver, and the symbol on each subcarrier is weighted by a coefficient derived from the output noise spectrum of the ΣΔ modulator. The numerical results obtained through computer simulation show that the BER performance is improved by about 2-3 dB on multipath fading channels.

    本文言語English
    ホスト出版物のタイトル2010 IEEE 72nd Vehicular Technology Conference Fall, VTC2010-Fall - Proceedings
    DOI
    出版ステータスPublished - 2010 12 1
    イベント2010 IEEE 72nd Vehicular Technology Conference Fall, VTC2010-Fall - Ottawa, ON, Canada
    継続期間: 2010 9 62010 9 9

    出版物シリーズ

    名前IEEE Vehicular Technology Conference
    ISSN(印刷版)1550-2252

    Other

    Other2010 IEEE 72nd Vehicular Technology Conference Fall, VTC2010-Fall
    国/地域Canada
    CityOttawa, ON
    Period10/9/610/9/9

    ASJC Scopus subject areas

    • コンピュータ サイエンスの応用
    • 電子工学および電気工学
    • 応用数学

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