Peak to Average Power Ratio Reduction in OFDM by Exponential Companding Technique

One of the major problems of Orthogonal Frequency Division Multiplexing (OFDM) is High-Peak-to-Average Power Ratio (PAPR). In this paper a new Exponential Companding Technique of PAPR reduction is analyzed. The use of Exponential Companding as an effective technique for minimizing the PAPR of OFDM signals is presented. The increase of in-band and out-of band noise due to sampling and compression is considered. The Bit-Error-Rate (BER) performance is also evaluated for transmission is also evaluated for transmission within an Additive White Gaussian Noise (AWGN) channel and Binary Symmetric Channel (BSC) channel. The improvement on Bit-Error-Rate (BER) performance and PAPR is studied and is compared with the performance due to Mu-law and Conventional coding within the OFDM transmission. It shows that the proposed exponential companding technique can offer better PAPR reduction, Bit Error Rate (BER) than the Conventional coding and Mu-law companding technique.