Implementation of PAPR Reduction method in OFDM with Clipping & Amplification

For wireless applications, an OFDM-based system can be of interest because it gives greater immunity to impulse noise, multi-path fading and eliminates necessity of equalizers. High PAPR is one of the critical problems in OFDM modulation. There are large numbers of techniques for reduction of PAPR. Selections of any method depend on PAPR Reduction performance, Data Rate loss and transmit signal power increase, Increased BER at the Receiver and computational complexity. In this paper, an efficient technique is evaluated to reduce the PAPR by making combination of the Clipping with Amplification method. Clipping can be performed in two ways- one is to clip the complex envelopes of OFDM signal and the other is to clip the In-phase (I-signal) and Quadrature phase (Q-signal) independently. Above two methods are implemented with the result that clipping the complex envelope method gives significant reduction in PAPR than clipping the In-phase (1-signal) and Quadrature phase (Q-signal) separately.