A novel clipping integrated into ACE for PAPR reduction in OFDM systems

Abstract

In this paper, we first propose a novel clipping, named as repeated enlipping (RE) scheme. Then, we integrate the proposed RE scheme into the conventional active constellation extension (ACE) scheme, called as ACE-RE scheme, to reduce the peak-to-average power ratio (PAPR) of the orthogonal frequency division multiplexing (OFDM) signals. The proposed ACE-RE scheme may greatly improve the convergence rate of the ACE method through effectively compressing large signals while enhancing small signals to achieve a significant reduction of PAPR with a low computational complexity. Simulation results are conducted to demonstrate that the proposed scheme can achieve a good PAPR reduction with a better convergence rate compared with the conventional ACE scheme.