STUDY ON REDUCTION OF PAPR OF OFDM SIGNALS

Abstract: In this paper, we have presented a report on peak to average power ratio (PAPR) reduction based on a weighted OFDM signal scheme. This method is proposed to reduce the PAPR, without distortion of the original signal while removing the weights at the receiver side. In the proposed scheme, a weight is allocated on each discrete signal via a certain kind of a band pass signal through mixture, and an OFDM signal formed with the weighted discrete data is then considered before a high power amplifier where as the original signal can be recovered at the receiver side. Meanwhile the time duration needed to transmit weighted signal is the same as the time duration for the original OFDM signal. The effectiveness of the proposed scheme is evaluated with computer simulations.

Keywords: PAPR (Peak-to-Average Power Ratio), OFDM, SLM, FFT (fast Fourier transform).