WLC45-5: On The Uniform Companding Transform for Reducing PAPR of MCM Signals

In this paper, we propose a novel nonlinear transform scheme to reduce the Peak-to-Average Power Ratio (PAPR) in multi-carrier modulation (MCM) systems. The key idea of the proposed scheme is to transform the original MCM signals such that the amplitude or the power of the companded signals follows uniform distribution. In this manner, the proposed scheme can effectively reduce the PAPR for different modulation formats and sub-carrier sizes without increasing the system complexity and signal bandwidth. Extensive simulation results show that the proposed schemes can significantly improve the performance of MCM systems.