QPSK Bit Error Rate Simulation File

This document presents an advanced QPSK (Quadrature Phase Shift Keying) bit error rate simulation with detailed implementation aspects. The simulation incorporates multiple realistic scenarios including comprehensive channel noise modeling (Additive White Gaussian Noise), dynamic signal power variations, and other critical transmission factors. The core algorithm implements a complete digital communication chain: QPSK modulation with Gray coding, noise injection through SNR parameterization, maximum likelihood demodulation, and error counting through bit-by-bit comparison. Through this simulation, users can thoroughly analyze QPSK transmission performance under various channel conditions and obtain quantitative BER curves for system optimization. The implementation utilizes MATLAB/Simulink-based signal processing functions for waveform generation, filtering operations, and statistical analysis. This simulation provides valuable insights for communication engineers, researchers, and students working on digital modulation schemes and wireless system design.