PAPR Analysis of FFT and DWT based OFDM using Clipping Technique

Abstract

In telecommunications, orthogonal frequency-division multiplexing is a variety of digital transmission and it is a way of encoding digital data on multiple carrier frequencies. Currently in wireless transmission area, Orthogonal Frequency Division Multiplexing (OFDM) is under intense research because of its robustness against multipath fading. However, it's some limitations like the Peak-to-average power ratio (PAPR), which restricts its use. It reduces the efficiency of the system. Few powerful and distortion less peak power reduction schemes for OFDM are One investigated technique is chosen mapping (SLM) where the particular transmit signal is chosen from a group of signals and therefore the second scheme utilizes phase rotated partial transmit sequences (PTS) to construct the transmit signal the third one Amplitude clipping is one amongst the best reduction techniques for PAPR. Amplitude Clipping reduces the height level of the sign to a predetermined value. The aim of this paper is to investigate the performance of system over clipping technique.