Effective Performance Analysis of Peak Power Reduction in Orthogonal Frequency Division Multiplexing System

Orthogonal Frequency Division Multiplexing (OFDM) is a digital transmission method developed to meet the increasing demand for higher data rates in communications which can be used in both wired and wireless environments. Coding, Phase rotation and Clipping are among many PAPR reduction schemes that have been proposed to overcome this problem. In this paper, we are analysed on three different PAPR reduction methods e.g. Partial Transmit Sequence (PTS) and Selective Mapping (SLM) are used to reduce PAPR. Significant reduction in PAPR has been achieved using these techniques. The performances of the two methods are then compared. Next, Clipping and Filtering (CAF) techniques are presented which reduce substantially the complexity of clipping algorithms by using novel methods to calculate the magnitude, avoiding the use of multiplication. A novel idea is presented to show the effect of HPA and noise on the OFDM signal and introduction of clipping as PAPR reduction method to reduce the power amplifier effect. Comparison between data phase representation of clipped and unclipped OFDM signal can also be seen.