Comprehensive OFDM Link Simulation Program

This document provides an in-depth analysis of a complete OFDM link simulation program. The implementation covers fundamental digital modulation techniques including BPSK (Binary Phase Shift Keying), QPSK (Quadrature Phase Shift Keying), and various QAM (Quadrature Amplitude Modulation) constellations. The simulation extends to practical OFDM system components with IFFT/FFT operations for orthogonal subcarrier generation and cyclic prefix insertion for multipath mitigation. The code also implements CDMA link simulations using spreading codes and correlators for multiple access capability. Furthermore, MAC layer simulation analysis incorporates frame structure design, channel access protocols, and error handling mechanisms. The implementation typically involves MATLAB or Python code with key functions for constellation mapping, pilot insertion, channel equalization, and bit error rate calculation. Through these comprehensive simulations and explanations, we gain deeper insights into OFDM link practical applications and performance advantages in wireless communication systems.