Physical Layer Simulation in Wireless Communication Systems

This is a complete and detailed simulation program for the physical layer in wireless communication systems. The program implements direct sequence spread spectrum technology to simulate signal transmission through various channel models including Gaussian and Rayleigh fading channels, while performing comprehensive signal-to-noise ratio analysis. The simulation includes key components such as: - Signal modulation and demodulation modules - Pseudorandom sequence generation for spreading codes - Channel modeling with additive white Gaussian noise (AWGN) and multipath Rayleigh fading - BER (Bit Error Rate) calculation and SNR performance evaluation Through analysis of the simulation results, we can derive important conclusions and insights regarding system performance under different channel conditions, including the effectiveness of spread spectrum techniques in mitigating interference and improving communication reliability in wireless environments. The program provides practical implementation examples of core physical layer algorithms and their performance characteristics.