Enhancing papr reduction for fbmc-oqam systems by joint both tone reservation and companding methods

Abstract

As all multi-carrier designs FBMC-OQAM signal suffers from large peak-to-average power ratio (PAPR). There are divers PAPR reduction methods to solve this problem. Tone reservation (TR) scheme is one of the most famous PAPR reduction techniques in which a peak cancelling signal is added to the original one in such a way that PAPR will reduce. Companding is another easy PAPR reduction technique in which compression of large amplitude samples and expansion of low one. In this paper, we suggest a new PAPR reduction scheme called TR&Compd, based on combining tone reservation and Mu-law companding techniques for FBMC-OQAM systems. The simulation results show that the new proposed scheme (TR&Compd) presents better results in term of PAPR reduction compared to TR and Mu-law companding methods taken separately.