发明申请
WO1989012934A1 AN INITIAL TRAINING APPARATUS FOR USE IN A TRANSMITTER AND RECEIVER APPARATUS
审中-公开
基本信息:
- 专利标题： AN INITIAL TRAINING APPARATUS FOR USE IN A TRANSMITTER AND RECEIVER APPARATUS
- 专利标题（中）：用于发射机和接收机的初始训练装置
- 申请号：PCT/JP1989000595 申请日：1989-06-14
- 公开(公告)号：WO1989012934A1 公开(公告)日：1989-12-28
- 发明人： FUJITSU LIMITED
- 申请人： FUJITSU LIMITED , FUKUDA, Misao , OHTA, Shinji , MIYOSHI, Seiji , YAMATO, Seiichi , MARUYAMA, Kazuyoshi , AWATA, Yutaka , KAWADA, Kinji
- 专利权人： FUJITSU LIMITED,FUKUDA, Misao,OHTA, Shinji,MIYOSHI, Seiji,YAMATO, Seiichi,MARUYAMA, Kazuyoshi,AWATA, Yutaka,KAWADA, Kinji
- 当前专利权人： FUJITSU LIMITED,FUKUDA, Misao,OHTA, Shinji,MIYOSHI, Seiji,YAMATO, Seiichi,MARUYAMA, Kazuyoshi,AWATA, Yutaka,KAWADA, Kinji
- 优先权： JP63/149373 19880617; JP63/149374 19880617
- 主分类号： H04B03/23
- IPC分类号： H04B03/23
摘要：
An initial gain of an automatic equalizer is fixed to a predetermined value. Then, the most appropriate gain of the automatic equalizer is determined when a training signal is received by the automatic equalizer. An echo replica signal produced by an echo canceler is multiplied by the value obtained by dividing the most appropriate gain by the initial gain. Thus, the echo replica signal is corrected to cancel the echo signal included in the output of the automatic equalizer. The sampling rate of the A/D converter used in the transmitter and receiver is shifted by a predetermined value from the transmission line rate at an initial training stage. Thereafter, the sampling rate of the A/D converter is determined to be near that of the transmission line.
摘要（中）：
自动均衡器的初始增益固定为预定值。 然后，当自动均衡器接收到训练信号时，确定自动均衡器最合适的增益。 由回波消除器产生的回波复制信号乘以通过将最适当的增益除以初始增益而获得的值。 因此，校正回波复制信号以消除包括在自动均衡器的输出中的回波信号。 在发射机和接收机中使用的A / D转换器的采样率在初始训练阶段从传输线路速率偏移预定值。 此后，A / D转换器的采样率被确定为接近传输线的采样率。