MATLAB Implementation of QPSK Bit Error Rate

This MATLAB program computes and visualizes the bit error rate (BER) and symbol error rate (SER) for QPSK modulation. The implementation uses Monte Carlo simulation techniques to generate BER/SER performance curves across different signal-to-noise ratio (SNR) conditions. Key algorithmic components include QPSK modulation/demodulation, AWGN channel simulation, and error counting mechanisms. The program calculates error rates by comparing transmitted and received symbols/bits, with SNR values typically ranging from 0 dB to 20 dB in incremental steps. Through debugging and validation testing, we have confirmed the program's functionality and accuracy. BER and SER serve as critical metrics for evaluating digital communication system performance. This implementation allows researchers to analyze QPSK signal reliability under varying channel conditions, facilitating comparisons between different modulation schemes for optimal system design in specific applications. The code structure includes modular functions for signal generation, noise addition, demodulation, and statistical analysis, making it valuable for both educational and research purposes in digital communications.