Frequency offset amplify-and-forward relay in OFDM system

Ayana Suzuki, Yukitoshi Sanada, Mamiko Inamori

    研究成果: Article査読

    3 被引用数 (Scopus)

    抄録

    In the fourth generation mobile communication system, the frequency band higher than the bands already used for IMT-2000 has been assigned. However, the higher radio frequency increases the propagation loss. To cope with the propagation loss, relay transmission has been investigated. In this paper, a transmission diversity scheme with frequency offset in amplify-and-forward (AF) relaying is proposed. In this scheme, the frequency of the OFDM signal is shifted at the relay station. A different amount of frequency offset is given in each relay station and the signals from the relay stations are separated and combined by MMSE detection at the base station. The numerical results obtained through computer simulation show that diversity is realized and the BER performance is improved by 1 - 2dB at the BER of 10-2. When the number of the RSs increases, more BER improvement is achieved.

    本文言語English
    ページ(範囲)3289-3295
    ページ数7
    ジャーナルIEICE Transactions on Communications
    E94-B
    12
    DOI
    出版ステータスPublished - 2011 12月

    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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