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

Ayana Suzuki, Mamiko Inamori, Yukitoshi Sanada

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

    1 Citation (Scopus)

    Abstract

    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.

    Original languageEnglish
    Title of host publication2010 IEEE 72nd Vehicular Technology Conference Fall, VTC2010-Fall - Proceedings
    DOIs
    Publication statusPublished - 2010 Dec 1
    Event2010 IEEE 72nd Vehicular Technology Conference Fall, VTC2010-Fall - Ottawa, ON, Canada
    Duration: 2010 Sep 62010 Sep 9

    Publication series

    NameIEEE Vehicular Technology Conference
    ISSN (Print)1550-2252

    Other

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

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    ASJC Scopus subject areas

    • Computer Science Applications
    • Electrical and Electronic Engineering
    • Applied Mathematics

    Cite this

    Suzuki, A., Inamori, M., & Sanada, Y. (2010). Subcarrier weighting scheme in OFDM receiver with ΣΔ A/D converter on multipath fading channels. In 2010 IEEE 72nd Vehicular Technology Conference Fall, VTC2010-Fall - Proceedings [5594188] (IEEE Vehicular Technology Conference). https://doi.org/10.1109/VETECF.2010.5594188