Simulation and BER Analysis of QPSK Modulation in AWGN and Rayleigh Fading Channels

This simulation investigates QPSK modulation performance in both AWGN (Additive White Gaussian Noise) and Rayleigh fading channels, including detailed BER (Bit Error Rate) calculation methodology. The implementation involves generating QPSK modulated signals, modeling channel impairments, and analyzing transmission reliability through systematic error counting. Key simulation components include parameter configuration (e.g., SNR range, fading parameters), signal generation using quadrant-based phase mapping, channel modeling with AWGN noise injection and Rayleigh fading coefficient generation, and BER calculation through symbol error counting normalized by total transmitted symbols. The report elaborates on implementation steps such as constellation diagram generation, Monte Carlo simulation techniques for statistical accuracy, and comparative analysis of BER curves under different channel conditions. Through this comprehensive technical documentation, readers will gain insights into QPSK's robustness, spectral efficiency, and error performance trade-offs in wireless communication scenarios.