Communication system with control signal based tuning

Details Communication system with control signal based tuning Communication system with control signal based tuning

1993-08-25

1995-12-12

Urban, Edward F.

Telecommunications

Transmitter and receiver at separate stations

With control signal

455 77, 455266, H04B 140

Patent

active

054758718

ABSTRACT:
A communications system (10) comprising a base station (12) for controlling a control channel signal and a plurality of traffic channels and a communications device (17) responsive to the control channel signal (16) and receptive to the plurality of traffic channels. The communications device comprises a tuneable filter (48), having an adjustable characteristic, which substantially filters all but a selected traffic channel of the plurality of traffic channels. The communications device further comprises a tuning circuit (24, 38, 40, 44, 46, 52) for adjusting the filter characteristic. The tuning circuit (24, 38, 40, 44, 46, 52) uses the control channel signal (16) as an accurate central frequency (F.sub.o) for a passband of the tuneable filter (48) and adjusts the filter characteristic to substantially a minimum insertion loss at the accurate central frequency, thereby substantially optimizing selectivity and sensitivity for the communications device (17).

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patent: 5327582 (1994-07-01), Wong
patent: 5339455 (1994-08-01), Vogt et al.
patent: 5404589 (1995-04-01), Bijker et al.

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