A novel approach to minimize Peak-to-Average Power Ratio in OFDM using Tone Reservation methodology

Abstract

Orthogonal Frequency Division Multiplexing (OFDM) has the drawback of having the Peak to Average Power Ratio (PAPR) because of the additive power of the various subcarriers. This paper provides an in depth analytical and graphical results of the Tone Reservation (TR) Method for minimization of PAPR in OFDM. TR involves the holding back of some subcarriers which are not used in the OFDM transmission to lower the PAPR. These subcarriers are named Peak Reduction Carriers (PRCs). The idea of TR is to determine appropriate values of these PRCs to bring down the PAPR of the transmitted signal to a minimum. In this regard, the prevalent techniques of TR for PAPR minimization work well but require that possible sequences of PRC sets are checked which increases the computational complexity.