| 摘要 |
<p>A demodulation timing generation circuit capable of generating correctly and with high precision a timing for demodulating a reception signal even under various kinds of reception conditions and a demodulation apparatus using the same, wherein AGC control and frequency offset correction are performed by the burst detector 109 and the amplification gain controller 111 using a synchronization training signal (burst signal) added to the head of the reception signal (packet), a detection window period is provided for cross-correlation detection to detect the peak of the cross-correlation in the detection window DW by the timing controller 110, and in the end (rear edge) of the window, data corresponding to the peak position is loaded in the counter 11003 for counting the OFDM symbol interval. Due to this, it is possible to set an optimal FFT timing irrespective of the condition of a channel. <IMAGE></p> |
