Cosite interference rejection system using an optical approach

Details Cosite interference rejection system using an optical approach Cosite interference rejection system using an optical approach

2005-08-23

2005-08-23

Phan, Hanh (Department: 2633)

Optical communications

Optical transceiver

C398S137000, C398S139000, C398S115000, C398S140000, C398S182000, C398S183000, C398S188000, C398S192000, C398S194000, C398S195000, C398S202000, C398S208000, C398S209000, C455S063300, C455S166200, C455S082000, C455S083000, C455S296000, C455S303000

Reexamination Certificate

active

06934476

ABSTRACT:
A cosite interference rejection system allows cancellation of large interfering signals with an optical cancellation subsystem. The rejection system includes an interference subsystem coupled to a transmit system, where the interference subsystem weights a sampled transmit signal based on a feedback signal such that the weighted signal is out of phase with the sampled transmit signal. The optical cancellation subsystem is coupled to the interference subsystem and a receive antenna. The optical cancellation subsystem converts an optical signal into a desired receive signal based on an interfering coupled signal and the weighted signal. The weighted signal is therefore used to drive the optical cancellation subsystem. The rejection system further includes a feedback loop for providing the feedback signal to the interference subsystem based on the desired receive signal.

REFERENCES:
patent: 4660042 (1987-04-01), Ekstrom
patent: 5117505 (1992-05-01), Talwar
patent: 5428831 (1995-06-01), Monzello et al.
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patent: 5574978 (1996-11-01), Talwar et al.
patent: 5724169 (1998-03-01), LaGasse
patent: 6731881 (2004-05-01), Nomura

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