OFDM System Implementation with MATLAB

In this document, we discuss the implementation of an OFDM system using MATLAB. Specifically, we employ QPSK modulation and incorporate cyclic prefix to mitigate inter-symbol interference. The system transmits signals through a Rayleigh multipath channel without implementing channel estimation techniques. We will examine the fundamental design principles of this system, along with potential challenges and corresponding solutions. The implementation involves key MATLAB functions such as qammod for QPSK modulation, ifft for orthogonal subcarrier generation, and appropriate zero-padding for cyclic prefix insertion. Through detailed discussion of these technical aspects, we aim to provide better understanding and practical application of this MATLAB-based OFDM system design. The system performance can be evaluated using error rate calculations and constellation diagram analysis to assess the impact of multipath propagation without channel equalization.