OFDM Power Ratio Reduction Using Invertible Clipping

Large fluctuation of OFDM signal amplitude represents an important problem for amplification in mobile communication systems. In this paper, we propose a new peak-to-average power ratio (PAPR) reduction technique. It is based on the well known clipping and filtering technique. Our technique, called "invertible clipping", is performed thanks to an invertible clipping function. It generates less intermodulation product noise than classical clipping and filtering. Furthermore, since this invertible clipping function could be inverted in reception side, degradations are compensated. The derived method benefits from the advantages (e.g., PAPR reduction) of classical clipping and filtering technique but it exhibits small computational complexity as compared to other peak reduction methods