Patent ID: 6934476

Claim:
A cosite interference rejection system comprising: an interference subsystem coupled to a transmit system, the interference subsystem weighting a sampled transmit signal based on a feedback signal such that the weighted signal is out of phase with the sampled transmit signal; an optical cancellation subsystem coupled to the interference subsystem and a receive antenna, the optical cancellation subsystem converting an optical signal into a desired receive signal based on an interfering coupled signal and the weighted signal; and a feedback loop for providing the feedback signal to the interference subsystem based on the desired receive signal; wherein the optical cancellation subsystem includes: an optical source for generating the optical signal; a modulation network coupled to the optical source, the receive antenna, and the interference subsystem, the modulation network phase modulating the optical signal based on the interfering coupled signal and the weighted signal; and a demodulation system coupled to the modulation network and the feedback loop, the demodulation system demodulating the phase modulated optical signal; wherein the modulation network includes: a first modulator coupled to the optical source and the receive antenna, the first modulator phase modulating the optical signal based on the interfering coupled signal; a second modulator coupled to the interference subsystem, the second modulator phase modulating the optical signal based on the weighted signal; and a fiber optic subsystem for transferring the optical signal from the first modulator to the second modulator.