Method for capturing spread spectrum signal under high dynamic Doppler

The invention relates to a method for capturing a spread spectrum signal under high-frequency Doppler. The method comprises the following steps: S1, carrying out direct current removal and orthogonal down-conversion processing on a received signal after AD sampling; S2, generating a local pseudo code, dividing the code length N of the pseudo code into X segments and N/X paths of pseudo code data, dividing the received signal subjected to down-conversion processing into N/X paths, and carrying out N/X point matched filtering processing on the two paths, wherein N can be exactly divided by X, and N and X are positive integers; S3, dividing the data subjected to N/X point matched filtering processing into two paths, performing rotation transformation on one path, enabling the other path to enter a time delay module, and performing X point FFT and incoherent integration processing on the two paths of data; and S4, selecting the maximum value in the two module values subjected to incoherent integration processing,