Pulse or digital communications – Synchronizers – Synchronizing the sampling time of digital data
Patent
1993-07-07
1996-08-27
Chin, Stephen
Pulse or digital communications
Synchronizers
Synchronizing the sampling time of digital data
455 551, 370108, H04L 700
Patent
active
055509924
ABSTRACT:
In each radio base station of a cellular mobile communication network in which a mobile station is communicative with the radio base stations through a time division multiplex radio link, a transmitter/receiver serves as a synchronization system in cooperation with a base station control unit (35) to synchronize a down-link radio signal generated from a transmission frame generator at a transmission time with a like down-link radio signal transmitted from a different one of the radio base stations. The synchronization system has a received frame regenerator for detecting a reception time of one of frames of an up-link radio signal directed from the mobile station to the different station. A timing controller calculates a time difference between the transmission and the reception time. Controlled by the control unit in accordance with the time difference, the timing controller controls, in turn, the transmission time. Preferably, the time difference is stored in a memory and read out by the control unit when the received frame regenerator receives another of the up-link frames that next follows the above-mentioned one up-link frame.
REFERENCES:
patent: 4800560 (1986-01-01), Aoki et al.
patent: 5261118 (1993-11-01), Vanderspoll, II et al.
patent: 5268933 (1993-12-01), Averbuch
patent: 5293380 (1994-03-01), Kondo
Heinz Ochsner, "DECT--Digital European Cordless Telecommunications", Apr. 29 to May 3, 1989, in San Francisco, California, at 39th IEEE Vehicular Technology Conference.
Chin Stephen
NEC Corporation
Webster Bryan E.
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