P-Code Acquisition using Matched Filtering and FFT

In this paper, we present a matched filtering combined with FFT acquisition method designed for direct P-code capture. The program implements a two-stage signal processing approach where matched filtering performs initial correlation detection in the time domain, followed by FFT-based frequency analysis to resolve Doppler shifts and code phase. This integrated approach enables efficient P-code signal acquisition with improved accuracy. The implementation utilizes circular correlation through frequency domain multiplication (using FFT and IFFT operations) to reduce computational complexity compared to traditional time-domain methods. Through this program, users can perform direct P-code acquisition with simplified operations while maintaining high efficiency and stability. The algorithm ensures reliable acquisition results by incorporating threshold detection and peak identification mechanisms in the frequency domain output. We believe this matched filtering + FFT acquisition program provides an effective solution for P-code technology applications, offering enhanced performance in signal acquisition scenarios.