Analyzing μ-law Commanding and SQRT Techniques in OFDM systems

Abstract

An Orthogonal FDM (OFDM) method remains a multi carrier modulation as well as multiplexing scheme. OFDM system performance based on mu- law companding and square rooting companding techniques are analysed with CCDF characteristics and BER Performances. As the simulation results show that the SQRT OFDM System is very effective system to reduce the PAPR and is used to improve the BER performance rate than OFDM system with mu-law companding transform. Simulation results also prove that by modulating a signal at fixed subcarriers for different modulation technique, the error in the transmitted signal increases rapidly but in case of fixed modulation techniques, we are analyzing mu law and SQRT companding OFDM signal on M ary QAM modulation technique the BER in the transmitted data is constant and varies by a small fraction so the number of bits of modulation techniques should be kept constant sacrificing the higher data rate.