| 摘要 |
PURPOSE:To extend the allowable quantity of the step-out in phase synchronism in a TDMA phase synchronizing system by adding the identify code of each base station to be added to each time slot to two points on the front and rear sides of the time slot. CONSTITUTION:At a base station (reference station) A which becomes a reference when phase synchronization is made between time slots and another base station (adjustment station) B which adjusts the transmitting timing of the time slots for phase synchronization, identify codes A1 and A2 and B1 and B2 are respectively added to the time slots transmitted from the other base stations B and A. When a step-out in phase synchronism is produced in the time slot of the base station B and the time stop overlaps the time slot of the station A in time, resulting in an interference state, one of the two added identify codes becomes undetectable, but the other identify code is not interfered with and can be detected. The step-out quantity in phase synchronism which is allowable in this case is large and practically becomes twice. Therefore, even when a large step-out in phase synchronism is produced, the step-out can be adjusted automatically. |
