Channelized receiver-front-end protection circuit which demultip

Details Channelized receiver-front-end protection circuit which demultip Channelized receiver-front-end protection circuit which demultip

1996-07-03

1998-11-17

Olms, Douglas W.

Multiplex communications

Communication over free space

Combining or distributing information via frequency channels

370497, 370480, 370536, 455303, 455304, H04J 100, H04J 102, H04J 304, H04B 110

Patent

active

058386750

ABSTRACT:
A channelized protection circuit for protecting the front-end of a receiver rom the detrimental effects of interference signals within the bandwidth of received signals is disclosed. The channelized protection circuit comprises: a frequency demultiplexer for separating a broadband input signal into a plurality of different signal components in respective contiguous frequency channels; a plurality of signal conditioning sub-circuits respectively responsive to the plurality of different signal components for selectively performing a conditioning operation on the plurality of different signal components to produce a plurality of conditioned signal components minimally affected by interference signals from within any of the contiguous frequency channels; and a frequency multiplexer having a plurality of contiguous frequency channels for recombining the plurality of conditioned signal components into a composite conditioned signal of original bandwidth and at a safe power level with a minimum amount of interference. Preferably, the channelized protection circuit also includes a first plurality of phase-adjusting circuits for compensating for phase imbalances among the plurality of different signal components, and also includes a second plurality of phase-adjusting circuits for compensating for phase imbalances among the plurality of conditioned signal components.

REFERENCES:
patent: 4002980 (1977-01-01), Herz
patent: 4258435 (1981-03-01), Levy
patent: 4484155 (1984-11-01), Nowogrodzki
patent: 4736171 (1988-04-01), Minarik
patent: 5101181 (1992-03-01), Rauscher
patent: 5233609 (1993-08-01), Hunton
patent: 5268905 (1993-12-01), Soloff
patent: 5438572 (1995-08-01), Rauscher
patent: 5625871 (1997-04-01), Myer

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