Open-loop correlation reduction precoding in overloaded MIMO-OFDM systems

Hikari Matsuoka, Yoshihito Doi, Tatsuro Yabe, Yukitoshi Sanada

    研究成果: Conference contribution

    2 被引用数 (Scopus)

    抄録

    This paper proposes an open-loop correlation reduction precoding scheme for overloaded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. In overloaded MIMO-OFDM systems, frequency diversity through joint maximum likelihood (ML) decoding suppresses performance degradation owing to spatial signal multiplexing. However, on a line-of-sight (LOS) channel, a channel matrix may have a large correlation between coded symbols transmitted on separate subcarriers. The correlation reduces the frequency diversity gain and deteriorates the signal separation capability. Thus, in the proposed scheme, open-loop precoding in order to reduce the correlation between codewords transmitted on different signal streams is employed at the transmitter of an overloaded MIMO system. The proposed precoding scheme changes the amplitude as well as the phase of the coded symbols transmitted on different subcarriers. Numerical results obtained through computer simulation show that the proposed scheme improves the bit error rate performance on Rician channels.

    本文言語English
    ホスト出版物のタイトル2015 IEEE 82nd Vehicular Technology Conference, VTC Fall 2015 - Proceedings
    出版社Institute of Electrical and Electronics Engineers Inc.
    ISBN(印刷版)9781479980918
    DOI
    出版ステータスPublished - 2016 1 25
    イベント82nd IEEE Vehicular Technology Conference, VTC Fall 2015 - Boston, United States
    継続期間: 2015 9 62015 9 9

    Other

    Other82nd IEEE Vehicular Technology Conference, VTC Fall 2015
    国/地域United States
    CityBoston
    Period15/9/615/9/9

    ASJC Scopus subject areas

    • コンピュータ ネットワークおよび通信
    • 自動車工学
    • ハードウェアとアーキテクチャ

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