Method and system for adaptively capturing Chirp signal

The invention provides a method and system for adaptively capturing Chirp signals, and the method comprises the steps: carrying out the amplitude adjustment of received digital baseband data based on the output gear information of DAGC, and obtaining correction data; any correction factor is calculated according to preset configuration parameters and the output gear information; generating a local Chirp signal which is the same as the Chirp signal of the transmitting end, and generating two paths of expansion signals based on the local Chirp signal; determining original peak values of the two paths of expansion signals according to the correction data and the two paths of expansion signals; determining corrected peak values of the two paths of extended signals according to the correction factors, preset configuration parameters and the original peak values; determining a corrected average value of related energy of the two paths of extended signals according to the corrected peak value; and determining a sign