Enhancing PAPR reduction for tone reservation algorithms by deep clipping

Large Peak-to-Average Power Ratio (PAPR) has been a crucial problem in OFDM system. Tone reservation (TR) is a well-known technique to reduce PAPR. Its advantages include no side information and no distortion on the data-bearing carriers. Direct implementation of TR can be complicated and therefore several approximation algorithms were developed. One such algorithm is the iterative clipping and filtering (ICF) under TR constraint. We improve the performance of ICF by introducing the use of deep clipping. Simulation results confirm that the modified algorithm can significantly improve the performance of ICF. We also found that the simple use of deep clipping under one TR filtering could achieve acceptable level of PAPR reduction and therefore provide an inexpensive PAPR reduction.