An enhanced spectrum method for GPS weak signal acquisition

FFT and IFFT are used to achieve two-dimension parallel acquisition for GPS signal. But peak of correct result is declined because of frequency resolution and navigation data transition and it results in error detecting. A method in frequency domain was proposed to ensure that the most probable Pseudo Random Noise (PRN) code phase and Doppler frequency could be detected. As the simulation showed, the method could eliminate jitter and relocate the correct peak under a Weak Signal Environment (WSE).