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    Method and apparatus for OFDM (orthogonal frequency division multiplexing) demodulation
    1.
    发明公开
    Method and apparatus for OFDM (orthogonal frequency division multiplexing) demodulation 有权
    Verfahren und Vorrichtung zur OFDM-（orthogonale Frequenzmultiplexierung）Demodulation

    公开(公告)号：EP1313282A1

    公开(公告)日：2003-05-21

    申请号：EP02025271.4

    申请日：2002-11-12

    申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

    发明人： Kisoda, Akira ,  Mori, Ryosuke ,  Taniguchi,Tomohiko ,  Hayashi, Daisuke

    IPC分类号： H04L27/26 ,  H04L25/02

    CPC分类号： H04L25/0232 ,  H04L27/2647 ,  H04L2025/03414 ,  H04L2025/03522

    摘要： At a first equalizer A, a scattered pilot signal is interpolated in time direction and frequency direction, thereby obtaining a channel characteristic H. By complex-dividing a received signal Y subjected to FFT by the channel characteristic, the respective signal is reconstituted. At a second equalizer B, a resultant signal is hard-decided, thereby obtaining a mapping vector X. Then, by dividing the received signal Y by X, a channel characteristic is calculated again. The calculated channel characteristic having reliability is substituted for the original channel characteristic. The substituted channel characteristic is filtered in frequency direction. In this way, a channel characteristic H' is calculated again and a signal point is reconstituted.

    摘要翻译： 在第一均衡器A中，在时间方向和频率方向上插入散射导频信号，从而获得信道特性H.通过将经受FFT的接收信号Y复用除以信道特性，重新构成相应的信号。 在第二均衡器B处，得到的信号是硬判决的，从而获得映射矢量X.然后，通过将接收信号Y除以X，再次计算信道特性。 具有可靠性的计算的通道特性代替原始通道特性。 取代的通道特性在频率方向上被滤波。 以这种方式，再次计算通道特性H'，并重构信号点。