A method for synchronizing the reference frequency oscillator of a metallic-based microcell to a master oscillator

摘要

The present invention involves a device for synchronizing the broadcast frequency of a base station (31) and a microcell (30) linked together by a metallic medium (5). The device comprises a base transmitter (4) which transmits a base time-of-day signal to a microcell comparer (11), and a microcell clock (14) which sends a microcell time-of-day signal to the microcell comparer (11). A microcell oscillator (12) provides the microcell clock (14) with a reference frequency. The microcell comparer (11) calculates a time difference which represents a time difference between the base time-of-day signal and the microcell time-of-day signal. The microcell comparer then outputs a correction signal to a digital controller (13). The digital controller adjusts the microcell oscillator (12) according to the correction signal. The present invention also involves a method for using the aforementioned device to synchronize the base oscillator (1) and the microcell oscillator (12).