BER Performance Analysis of OFDM, MPSK, MDPSK, and QAM Modulation Schemes

This MATLAB simulation package provides a comprehensive analysis of Bit Error Rate performance for four key modulation schemes: OFDM, MPSK, MDPSK, and QAM. The implementation includes sophisticated signal processing components such as orthogonal frequency division multiplexing (OFDM) with IFFT/FFT operations, M-ary phase shift keying (MPSK) constellation mapping, differential encoding for MDPSK, and quadrature amplitude modulation (QAM) with optimal signal point arrangements. The simulation framework employs Monte Carlo methods to generate transmission signals, add AWGN (Additive White Gaussian Noise) with varying SNR levels, and perform demodulation with error detection algorithms. Key functions include signal constellation generation, symbol-to-bit mapping, error rate calculation using comparative analysis between transmitted and received data streams, and performance curve plotting capabilities. Through these simulation experiments, researchers can gain deep insights into the relative performance characteristics, noise immunity, and spectral efficiency of each modulation scheme under different channel conditions. The code is structured with modular components allowing easy parameter modification and extension to additional modulation types, making it an ideal educational and research tool for digital communication system design.