Title:
【発明の名称】金属媒体で連結された基地局とマイクロセル局との間の同期装置とその方法
Document Type and Number:
Japanese Patent JP2665167
Kind Code:
B2
Abstract:
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).
Inventors:
George P. Bella-Coleiro
Application Number:
JP27427494A
Publication Date:
October 22, 1997
Filing Date:
October 14, 1994
Export Citation:
Assignee:
AT&T CORP.
International Classes:
H04B7/26; G04G7/00; H03L7/00; H04W16/30; H04W16/32; H04W56/00; H04W92/00; (IPC1-7): H04Q7/36; H04B7/26
Domestic Patent References:
| JP6162244A |
Other References:
【文献】「放送技術」VOL.41 NO.10 昭和63年10月1日 p.108~109「周波数・時刻同期実験」
Attorney, Agent or Firm:
Hirofumi Mimata