| 摘要 |
A radar system ( 500 ) radiates a radar transmit signal, has a radar signal receiver ( 503 ) and a canceller ( 505 ) for canceling leakage of the transmit signal into the radar signal receiver ( 503 ). The canceller ( 505 ) comprises a digital waveform generator ( 528 ) for generating a first digital signal converted to an analog waveform. The analog waveform is amplified after a fixed delay ( 534 ) to generate a first cancellation signal input into a circulator ( 504 ). The circulator combines the first cancellation signal with the leakage to generate a first corrected signal. A summer ( 507 ) combines the first corrected signal from the circulator with a second cancellation signal to generate a second corrected signal. The second cancellation signal is generated by a digital cancellation filter ( 526 ). The digital cancellation filter ( 526 ) has as an input the first digital signal from the digital waveform generator ( 528 ). The digital cancellation filter ( 526 ) is controlled using weight adjustments computed by an adaptive weight processor ( 518 ). The adaptive weight processor ( 518 ) samples the second corrected signal and computes the weight adjustments to optimize the second cancellation signal.
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