| 摘要 |
PURPOSE:To attain initial synchronization in a time division multidirection communication system with simple constitution by using information of phase difference and bit delay amount at a slave station to control the phase of a transmission clock and transmission timing. CONSTITUTION:A master station A is provided with a phase difference detecting means comprising a multiplier circuit 4 extracting k bits nearly at the center of a position confirming signal received normally in a time width less than m bits of a position confirming signal to detect a phase difference with a reference clock signal, a detection circuit 5, a low-pass filter 6, an amplifier 7 and an identification circuit 8 or the lime, and with a detection means for bit delay amount comprising a counter 10 extracting a part of a position confirming signal and counting it in a time width obtained by the addition of m/2 bits and l bits from nearly the center of the position confirming signal received periodically. Thus, the phase difference information and bit delay information are transmitted from the master station A to a slave station B, the slave station B uses the phase difference information to apply phase control of a transmitted clock signal and adjust the delay time in the device by the bit delay information. |
