MATLAB-based GPS Signal Acquisition Program

Application Background: In contemporary life, scientific research, and industrial production domains, GPS technology has become widely implemented. This program performs GPS signal acquisition and satellite search operations by determining visible GPS satellite PRN numbers, Doppler frequency shifts, and initial code phase offsets to obtain more precise results. These outcomes can subsequently be used for signal tracking and navigation solution calculations to meet more complex application requirements. Key Technologies: The program employs multiple technical approaches to achieve its functionality. The ca_repeat.m function generates sampled sequences of specified C/A codes with configurable sampling rates. CAENCODE.m implements the C/A code generation algorithm using shift registers to produce pseudorandom noise sequences corresponding to specific satellite PRNs. The findmax.m function performs peak detection in correlation results using maximum value search algorithms. GPSAcq.m serves as the primary acquisition function that implements parallel frequency and code phase search algorithms, including correlation operations and threshold detection. Furthermore, key GPS signal parameters including frequency points, intermediate frequency values, and sampling rates can be modified during initialization according to user requirements, enabling adaptation to different application scenarios. Additionally, the code package contains authentic GPS datasets that facilitate more accurate testing and validation procedures under real-world conditions. Overall, the program's design and implementation demonstrate comprehensive understanding of GPS technology principles and thorough consideration of user needs, providing GPS application professionals with a more comprehensive and accurate tool for satellite signal processing and navigation applications.