GPS Signal Simulation Implementation Using MATLAB

This documentation presents the implementation process of GPS signal simulation using MATLAB. GPS signals are transmitted from satellites to Earth and subsequently received and processed by receivers. The simulation of GPS signals enables better understanding of signal transmission and reception mechanisms. During the simulation process, we utilized MATLAB programming language to adjust and modify various signal parameters, ultimately generating simulated GPS signals. Key implementation aspects include modeling C/A codes using Gold code sequences, simulating Doppler effects through frequency shift algorithms, and implementing correlation-based signal acquisition using MATLAB's signal processing toolbox. This process requires comprehensive knowledge of GPS signal characteristics including PRN code structure, navigation data format, and signal modulation techniques. Through parameter configuration functions like setSatelliteParameters() and simulateDopplerEffect(), users can customize signal conditions resembling real-world scenarios. The simulation employs baseband processing techniques with I/Q component generation and implements signal-to-noise ratio (SNR) control through additive white Gaussian noise (AWGN) injection. Overall, this simulation deepens the understanding of GPS signal transmission principles and related technologies, while providing practical knowledge applicable to real-world projects involving satellite navigation systems.