Proposing a fast time-frequency-domain parallel acquisition algorithm based on FFT

The acquisition of PN codes plays an important part in the Spread Spectrum Communication Systems. In order to accelerate the procedure of acquisition, we study parallel acquisition algorithm, which concurrently performs frequency domain searching with FFT and time domain searching with multi channels. And the theoretical deduction result validates the correctness. Further analysis on precision, speed, complexity and low-pass effect reveals the superiority. Finally we demonstrate the feasibility from the aspect of simulation. From the theoretical analysis and simulation verification, we can conclude that the proposed parallel acquisition algorithm can accelerate the acquisition without the sacrifice of precision.