METHOD, SYSTEM AND STORAGE MEDIUM OF SIGNAL ACQUISITION BASED ON SELECTIVE COHERENT INTEGRATION FOR ANTI-JAM OF PROTECTED GLOBAL POSITIONING SYSTEM USER EQUIPMENT

원문 (중국어)

A signal acquisition method includes: establishing a sub-integration length of a prime code signal to be a half of a symbol duration of navigation data, where the prime code signal is received by a signal receiver and includes a plurality of sub-integration pairs, and each sub-integration pair includes a first sub-integration and a second sub-integration; for each sub-integration, generating a first local replica and a second local replica based on the prime code signal; and executing FFT based convolution on the prime code signal, the first local replica and the second local replica to yield two convolution results; comparing two convolution maximum peak values and selecting convolution maximum peak values with higher magnitude in the sub-integration pair as first and second convolution peak values; and comparing the first convolution peak value and the second convolution peak value to obtain a corresponding IFFT convolution result to be outputted.