Synchronizing groups of base stations in time division duplex co

Details Synchronizing groups of base stations in time division duplex co Synchronizing groups of base stations in time division duplex co

1993-06-02

1994-09-13

Kuntz, Curtis

Telephonic communications

Having light wave or ultrasonic link for speech or paging...

Including fiber optic link within telephone network

379 61, 455 511, 455 70, 455 88, H04M 1100

Patent

active

053475623

ABSTRACT:
A telephone system in which communication between fixedly sited primary stations and transportable secondary stations is by way of respective time division duplex (TDD) radio links, particularly single frequency TDD links. In order to reduce radio interference between closely sited primary stations, their transmit periods are frame synchronized by using an externally produced radio signal. Conveniently a broadcast television field synchronization signal can be used.

REFERENCES:
patent: 2509237 (1950-05-01), Labin et al.
patent: 4117405 (1978-09-01), Martinez
patent: 4414661 (1983-11-01), Karlstrom
patent: 4513415 (1985-04-01), Martinez
patent: 4651330 (1987-03-01), Ballance
patent: 4935927 (1990-06-01), Kaewell, Jr. et al.
patent: 5103448 (1992-04-01), Barnes
MPT 1375, "Common Air Interface Specification", Department of Trade and Industry, London, May 1989, pp. i-4-26.

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