Simulation of Companding Expansion Technique for PAPR Reduction in OFDM Systems

This program implements a MATLAB simulation of companding expansion techniques for Peak-to-Average Power Ratio (PAPR) reduction in Orthogonal Frequency Division Multiplexing (OFDM) systems. The simulation framework includes algorithm implementations that test various μ parameter values to quantitatively analyze their impact on PAPR reduction performance. The companding technique employs nonlinear transformation functions that compress high-amplitude signals while expanding low-amplitude signals, implemented through mathematical operations on OFDM subcarriers. Beyond the core simulation, we conduct in-depth research on OFDM technology, examining its advantages and limitations, practical application domains, and future development trends. The study includes comparative analysis between OFDM and related communication technologies, with performance evaluations based on key metrics like spectral efficiency and bit error rate. This simulation provides valuable insights into OFDM system optimization and suggests promising directions for future research in wireless communication systems.