Absolute Exponential Companding to Reduced PAPR for FBMC/OQAM

Abstract

Filter Bank Multicarrier with Offset Quadrature Amplitude Modulation (FBMC/OQAM) may be one of the best waveform used in the next generation wireless communication system (5G system). Moreover, The FBMC/OQAM system supports high data rate, low impulse noise and high bandwidth efficiency. However, Similar to Orthogonal frequency-division multiplexing OFDM system, the FBMC/OQAM system are the type of multicarrier modulation system (MCM) which suffers from high peak to average power ratio (PAPR) problem cases reduced power efficiency. In this paper, We propose a nonlinear companding scheme called 'Absolute Exponential Companding' (AEXC) to reduced PAPR in FBMC/OQAM system. However, the FBMC/OQAM system is employed with prototype filter bank using square root raised cosine (SRRC) filter. The simulation results show that, The proposed schemes highly effectively reduces the PAPR in the system by compressing the peak signals and expanding the small signals.