Performance of overloaded MIMO-OFDM system with repetition code

Hikari Matsuoka, Yoshihito Doi, Tatsuro Yabe, Yukitoshi Sanada

    研究成果: Article査読

    5 被引用数 (Scopus)


    This paper investigates the performance of an overloaded multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) system with a repetition code. It has been demonstrated that diversity with block coding prevents the performance degradation induced by signal multiplexing. However, the computational complexity of a joint decoding scheme increases exponentially with the number of multiplexed signal streams. Thus, this paper proposes the use of a repetition code in the overloaded MIMO-OFDM system. In addition, QR decomposition with M-algorithm (QRM) maximum likelihood decoding (MLD) is applied to the decoding of the repetition code. QRM-MLD significantly reduces the amount of joint decoding complexity. In addition, virtual antennas are employed in order to increase the throughput that is reduced by the repetition code. It is shown that the proposed scheme reduces the complexity by about 1/48 for 6 signal streams with QPSK modulation while the BER degradation is less than 0.1 dB at the BER of 10-3.

    ジャーナルIEICE Transactions on Communications
    出版ステータスPublished - 2014 12月 1

    ASJC Scopus subject areas

    • ソフトウェア
    • コンピュータ ネットワークおよび通信
    • 電子工学および電気工学


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