Synchronization control circuit for TDMA cellular communication

Details Synchronization control circuit for TDMA cellular communication Synchronization control circuit for TDMA cellular communication

1992-04-27

1995-01-03

Chin, Stephen

Pulse or digital communications

Spread spectrum

Direct sequence

370 953, 3701001, 375107, H04L 700

Patent

active

053793269

ABSTRACT:
A synchronization control circuit applicable to a TDMA (Time Division Multiple Access) digital mobile communication system for controlling the transmission and reception time base of a mobile station on which the circuit is mounted. The synchronization control circuit includes a plurality of time base counter circuits each counting down standard clock pulses to generate a plurality of timing pulse sequences having time bases which are respectively associated with the cells of the system. All the time base counter circuits share a single counter controller which controls the writing and reading of counts out of the time base counter circuits. The counter controller selectively produces the outputs of one of the time base counter circuits as a timing pulse sequence. The synchronization control circuit, therefore, is small size and light weight and saves power.

REFERENCES:
patent: 4398291 (1983-08-01), Hotta et al.
patent: 4491947 (1985-01-01), Frank
patent: 4561099 (1985-12-01), Atsugi et al.
patent: 5237592 (1993-08-01), Nonami
GSM 05.01 Physical Layer on the Radio Path: General Description (Version 3.3.1), FIGS. 1 and 4.
I. Shimizu et al, "New Digital Mobile Radio Technologies", NTT Review, vol. 4, No. 1, Jan. 1992, pp. 64-69.

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