| 摘要 |
PURPOSE:To grasp the change of the segment of a training signal to improve the precision of training synchronization by discriminating the time of conversion of a multiplication result from -1 to +1 as the time, when a pi/pi signal of the training signal is changed to a 0/pi signal, to oscillate a CD signal. CONSTITUTION:In the training synchronizing system, a complex conjugate getting means 7 is provided. A complex conjugate of the through output of an automatic equalizer 4 is gotton by the means 7, and the value of one symbol before of the through output of the equalizer 4 is stored in a tap circuit 5. The complex conjugate of the through output of the equalizer 4 and the value of one symbol before are multiplied by a multiplying circuit 6. The time of conversion of the multiplication result from -1 to +1 is decided as the time, when the pi/pi signal of the training signal is changed to the 0/pi signal, to oscillate the CD signal. Thus, the change of the segment of the training signal is grasped to improve the precision of training synchronization. |
