PALM CLIPPING AND NONLINEAR COMPANDING TECHNIQUES BASED PAPR REDUCTION IN OFDM-DCSK SYSTEM

Authors

  • Sajjad R. Abdulridha Electrical Engineering Department, Mustansiriyah University, Baghdad, Iraq
  • Fadhil S. Hasan Electrical Engineering Department, Mustansiriyah University, Baghdad, Iraq

DOI:

https://doi.org/10.31272/jeasd.25.4.8

Keywords:

Orthogonal Frequency Division Multiplexing, Differential Chaos Shift Keying, Peak Power to Average Power Ratio, Palm Clipping, Companding techniques

Abstract

The main drawback of the Orthogonal Frequency Division Multiplexing (OFDM) with Differential Chaos Shift Keying (DCSK) that is named (OFDM-DCSK) is the high Peak to Average Power Ratio (PAPR). In this paper, clipping and companding techniques are suggested to overcome the PAPR problem in the OFDM-DCSK system. For the clipping technique, the clipping function is applied before transmitting the signal without the need for an inverse function at the receiver side. While for companding techniques, the commanding function is applied at the end of the transmitter side and the corresponding decompanding function is applied at the receiver to recover the original signal. Different companding techniques are investigated including Hyperbolic, A-Law, and Mu-Law companding function that are compared with the Palm clipping technique. The MATLAB simulation result shows that the Mu-Law technique has the best PAPR reduction (7.22 dB) with a good bit error rate (BER) performance when the number of subcarriers is equal to 512.

Downloads

Published

2022-02-15

How to Cite

R. Abdulridha, S. ., & S. Hasan, F. . (2022). PALM CLIPPING AND NONLINEAR COMPANDING TECHNIQUES BASED PAPR REDUCTION IN OFDM-DCSK SYSTEM. Journal of Engineering and Sustainable Development, 25(4), 84–94. https://doi.org/10.31272/jeasd.25.4.8