| 摘要 |
PURPOSE:To supervise and adjust accurate phase synchronization by calculating the phase deviation from the time difference of identification codes in time slot of a reference station and its own station by each base station so as to adjust the phase synchronization of a transmission signal thereby eliminating the need for the adjusting channel. CONSTITUTION:A signal generating section 29 of an adjustment station 14 generates a signal being the addition of a signal specific to its own station to a signal received via a terminal 27 from a line control station 12 and an on/off signal having an on/off part in the time slot and a variable delay circuit 31 sends the signal via a transmitter from a terminal 33. Further, a reference station 13 sends an on/off signal without delay adjustment. On the other hand, the reception signals from the stations 13 and its own station 14 one inputted from a terminal 28, and in detecting an identification code of the station 13 by a time difference measuring section 30, a timer is started, and in detecting an identification code of the station 14, the timer is stopped to output a reception time difference H. The difference H is measured repetitively and given to a phase synchronization control section 32. The control section 32 obtains a phase deviation D based on the difference H and adjusts the circuit 31 by the deviation D if any deviation exists. |
