Patent ID: 7202812
Filing Date: 2007-04-10
Classification: G01S,H04B

Abstract:
1. A radar system emitting a radar transmit signal, said radar system having a radar signal receiver for receiving reflected returns of said radar transmit signal, and a canceller for canceling leakage from said radar transmit signal into said radar signal receiver, said leakage impairing operation of said radar signal receiver, said canceller comprising: a digital waveform generator for generating a first digital signal converted to an analog waveform, said analog waveform amplified after a fixed delay to generate a first cancellation signal input into a circulator, said circulator combining said first cancellation signal with said leakage to generate a first corrected signal a summer for combining said first corrected signal from said circulator with a second cancellation signal to generate a second corrected signal, said second cancellation signal generated by a digital cancellation filter, said digital cancellation filter having as an input said first digital signal from said digital waveform generator, said digital cancellation filter controlled using weight adjustments computed by an adaptive weight processor, said adaptive weight processor sampling said second corrected signal and computing said weight adjustments to optimize said second cancellation signal.