Peak-to-average-power reduction for FBMC-based systems

In this study, different peak-to-average-power-ratio (PAPR) reduction schemes proposed for OFDM are analyzed for Filter-Bank Multicarrier/Offset Quadrature Amplitude Modulation (FBMC/OQAM) systems, namely clipping, tone reservation (TR), active constellation extension (ACE), joint tone reservation and active constellation extension (TRACE) and selected mapping (SLM). A modification of selected mapping (SLM) is introduced, where the overlapping structure of FBMC/OQAM signals is exploited. Further, a novel set of schemes for PAPR reduction that can be applied to any multicarrier modulation technique called two-stage PAPR reduction is proposed. This set of schemes is found to offer similar PAPR reduction performance of clipping, however with an improved SER performance that varies depending on the complexity and the type of the used first stage. It is observed, that the PAPR reduction can benefit for FBMC by taking the specific structure of the time-domain signal into account.