GPS and Galileo Receiver: Source Code Implementation Guide

The textbook "A Software-Defined GPS and Galileo Receiver: A Single-Frequency Approach" serves as a comprehensive theoretical foundation for satellite navigation systems. Complementing the book's concepts, the accompanying source code provides practical implementation examples using MATLAB/Simulink environments. The codebase includes complete signal processing chains featuring acquisition algorithms based on FFT parallel code-phase search, tracking loops with carrier and code discriminators, and navigation message decoding modules.

Key implemented functions comprise correlation-based signal detection, DLL (Delay Lock Loop) and PLL (Phase Lock Loop) synchronization techniques, ephemeris data parsing, and position solutions using least-squares estimation. The single-frequency approach implementation demonstrates real-time capable algorithms for satellite signal processing, including Doppler removal, code generation for GPS C/A and Galileo E1 signals, and atmospheric error correction models.

Researchers and developers can leverage this open-source framework to modify receiver parameters, integrate new signal components, or enhance existing algorithms. The modular architecture allows independent testing of subsystems like signal acquisition sensitivity, tracking loop stability, and navigation accuracy under various conditions. This adaptable codebase enables practical experimentation with software-defined radio (SDR) concepts while maintaining compliance with standard GPS and Galileo interface specifications.