A new tone reservation scheme for PAPR reduction in FBMC/OQAM systems

Filter Bank Multicarrier with Offset Quadrature Amplitude Modulation (FBMC/OQAM) is recognized as an appropriate modulation scheme for 5G wireless technologies. With an extremely low Adjacent Channel Leakage Ratio (ACLR), FBMC/OQAM scheme is a suitable candidate for cognitive radio (CR) applications. Like all multicarrier systems, FBMC/OQAM suffers from the high Peak to Average Power Ratio (PAPR). Because of its overlapping signal structure, the direct application of the PAPR reduction schemes proposed for the Orthogonal Frequency Division Multiplexing (OFDM) signal to FBMC/OQAM one is not effective. In this investigation, the main contribution is a novel PAPR reduction scheme based on the extension of the current Tone Reservation (TR) scheme as used in OFDM to FBMC/OQAM. Based on simulation results, the proposed scheme shows almost the same PAPR reduction performance when compared with that of the conventional TR method originally proposed for OFDM.