Spread Spectrum System Anti-Jamming Performance Simulation

This code simulates the bit error rate (BER) of spread spectrum systems when subjected to sinusoidal interference with different amplitudes. Spread spectrum systems are communication systems that utilize spread spectrum technology for modulation and demodulation, where transmitted signals are susceptible to various interferences including sinusoidal jamming during transmission. To better understand system performance, it's essential to evaluate and analyze the BER under different interference conditions. The implementation uses pseudo-random noise (PN) sequences for spectrum spreading and employs correlation-based detection at the receiver. The simulation framework includes: - Generation of BPSK modulated signals - Application of spreading codes with specified processing gain - Introduction of sinusoidal interferers with controllable amplitude parameters - AWGN channel modeling with configurable SNR levels - Correlation detection and threshold-based decision making Key algorithmic components include: 1. PN sequence generation using linear feedback shift registers 2. Signal-to-interference ratio (SIR) calculations 3. BER computation through Monte Carlo simulations 4. Comparative analysis of system performance across different interference levels Through this comprehensive simulation, the code provides accurate assessment of system performance under varying interference conditions, offering valuable insights for system optimization and enhancement. The results demonstrate the inherent interference rejection capabilities of spread spectrum systems and help identify performance thresholds under different jamming scenarios.