Frame synchronizing system for TDMA radio communications

Details Frame synchronizing system for TDMA radio communications Frame synchronizing system for TDMA radio communications

1977-11-07

1978-12-12

Stewart, David L.

325 4, H04J 306

Patent

active

041297555

ABSTRACT:
A frame synchronizing equipment is disclosed which enables the TDMA technique to be used in a mobile communication system or a small-scale stationary communication system and requires no reference station. Plural radio channels separated from one another on a time-sharing basis are monitored upon initiation of a call by one of plural radio stations to detect the presence of a unoccupied channel. When an occupied channel followed by an unoccupied channel is detected, a pulse is extracted in a frame period synchronized with a burst signal of the occupied channel immediately preceding the unoccupied channel. A phase synchronization oscillating circuit generates a frame synchronization signal in synchronism with the extracted pulse.

REFERENCES:
patent: 3764914 (1973-10-01), Cox

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