Complexity reduction in joint decoding of block coded signals in overloaded MIMO-OFDM system

Yoshihito Doi, Mamiko Inamori, Yukitoshi Sanada

    研究成果: Conference contribution

    3 被引用数 (Scopus)

    抄録

    This paper presents a low complexity joint decoding scheme of block coded signals in an overloaded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system. In previous literature, a joint maximum likelihood decoding scheme of block coded signals has been evaluated through theoretical analysis. The diversity gain with block coding prevents performance degradation induced by signal multiplexing. However, the computational complexity of the joint decoding scheme increases exponentially with the number of multiplexed signal streams. Thus, this paper proposes a two step joint decoding scheme for the block coded signals. The first step of the proposed scheme calculates metrics to reduce the number of the candidate codewords using decoding based on joint maximum likehood symbol detection. The second step of the proposed scheme carries out joint decoding on the reduced candidate codewords. It is shown that the proposed scheme reduces the complexity by about 1/174 for 4 signal stream transmission.

    本文言語English
    ホスト出版物のタイトルISPACS 2013 - 2013 International Symposium on Intelligent Signal Processing and Communication Systems
    ページ590-595
    ページ数6
    DOI
    出版ステータスPublished - 2013 12 1
    イベント2013 21st International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2013 - Naha, Okinawa, Japan
    継続期間: 2013 11 122013 11 15

    出版物シリーズ

    名前ISPACS 2013 - 2013 International Symposium on Intelligent Signal Processing and Communication Systems

    Other

    Other2013 21st International Symposium on Intelligent Signal Processing and Communication Systems, ISPACS 2013
    国/地域Japan
    CityNaha, Okinawa
    Period13/11/1213/11/15

    ASJC Scopus subject areas

    • 人工知能
    • 信号処理

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