BOC Modulation: Implementation and Signal Analysis

Experimental results demonstrate that satellite BOC modulation signals can operate correctly. This modulation technique represents a novel approach for satellite navigation signals, significantly enhancing anti-jamming capabilities and precision. BOC modulation employs two carrier signals: one binary code signal and one subcarrier waveform. The key characteristic of this modulation scheme is its ability to improve signal anti-interference performance and tracking accuracy while maintaining the same bandwidth utilization. From an implementation perspective, BOC modulation typically involves generating a spreading code (such as PRN codes) multiplied by a square wave subcarrier. The MATLAB implementation would require: - Generating baseband pseudorandom noise (PRN) sequences - Creating a subcarrier waveform (commonly sine or square wave) - Modulating the PRN sequence with the subcarrier using multiplication operations - Applying additional carrier modulation for RF transmission The algorithm's core lies in the spectral separation achieved by the subcarrier modulation, which creates symmetric sidebands around the carrier frequency. This spectral shaping allows better coexistence with existing signals and improved multipath resolution. Key functions in implementation would include subcarrier generation, code-subcarrier multiplication, and spectral analysis components. Due to these technical advantages, BOC modulation technology holds promising application prospects in the satellite navigation field, particularly for modern GNSS systems like Galileo and modernized GPS.