MATLAB Source Code for Beidou-II B1 Frequency Signal Acquisition in Receiver Systems

This article provides a comprehensive technical walkthrough for implementing Beidou-II B1 frequency signal acquisition using MATLAB source code. The content begins with an explanation of the fundamental principles and operational mechanisms of B1 frequency receivers, establishing the theoretical foundation necessary for understanding the MATLAB implementation. We then guide users through the step-by-step process of MATLAB installation and environment configuration, including specific instructions for importing the acquisition code into the MATLAB workspace. The core section delves into the code architecture, breaking down each functional module with algorithmic explanations - covering critical components such as local carrier generation, pseudo-random code correlation, Doppler frequency search algorithms, and threshold detection methods. Key implementation aspects include: - Efficient FFT-based parallel code phase search implementation - Doppler frequency bin optimization techniques for reduced computational load - Correlation peak detection algorithms with adaptive threshold settings - Signal-to-noise ratio (SNR) estimation methods for acquisition validation The article concludes with practical application scenarios demonstrating real-world B1 signal acquisition cases, including performance analysis under various signal conditions. These examples illustrate how to adapt the code for different receiver configurations and environmental factors. This resource aims to equip readers with both theoretical knowledge and practical skills for mastering Beidou B1 signal acquisition technology in satellite navigation systems.