Performance of Joint PAPR Reduction Iterative Clipping and Filtering (ICF) and Predistortion in OFDM Systems Using Software Defined Radio

OFDM technique is a multicarrier technique which has the bandwidth efficient. The OFDM can overcome multipath fading effects and intersymbol interference (ISI). However, OFDM has several weaknesses, one of them is a high peak-to-average power ratio (PAPR) and the high papr value can result the non linear distortions when is passed through a non linear power amplifier. The joint system of the PAPR reduction and the predistortion technique can be used remove the non-linear distortions. In this paper we use the iterative clipping and filtering (ICF) method as the papr reduction technique and Hammerstein model as the predistortion technique for Wiener model of the non linear HPA. To evaluate the performance of the system we do the experiment using USRP Software Defined Radio (SDR), and supported by the Labview and Python softwares. From the experiment results can be shown that the ICF technique reduce papr value of 6.06 dB. The predistortion technique can linearize the AM/AM transfer function curve of HPA, and remove the non linear distortion by representing the symbols constellation and the power spectral density.