Simulation Analysis of BOC Modulation - A Primary Signal Modulation Technique

This paper presents a detailed simulation analysis of BOC (Binary Offset Carrier) modulation, a primary signal modulation technique used in satellite navigation systems. We begin by introducing the fundamental principles and development history of satellite navigation systems. Subsequently, we provide a comprehensive explanation of BOC modulation's working mechanism and its advantages over conventional modulation schemes. The implementation typically involves generating two separate sub-carriers using sine and cosine functions, followed by code multiplication and carrier modulation operations.

Through simulation tools, we conducted extensive experiments to evaluate BOC modulation's performance under various scenarios. Our simulation setup included MATLAB/Simulink implementations with key functions such as boc_modulator() for signal generation and noise_addition() for realistic channel conditions. We considered multiple interference scenarios and noise conditions, systematically assessing BOC modulation's anti-interference capabilities and bit error rate performance. The evaluation metrics included carrier-to-noise ratio analysis and synchronization performance tests using correlation-based detectors.

Finally, we summarize the simulation results and propose several recommendations and improvement directions. These include optimization algorithms for sub-carrier frequency selection, enhanced receiver structures with improved correlation techniques, and adaptive filtering methods to further boost the performance and reliability of BOC modulation in satellite navigation systems. The simulation code architecture demonstrates how to implement variable parameter testing for different BOC(m,n) configurations through modular function design.