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Novel RAPF scheme and its performance of PAPR reduction and BER in FBMC-OQAM system

Filter bank multicarrier with offset quadrature amplitude modulation (FBMC-OQAM) has gained significant importance as a contender for the fifth generation mobile communication system and also meets the application requirements of the Internet of things. The peak-to-average power ratio (PAPR) of the FBMC-OQAM is very high due to using a same prototype filter for each subcarrier and the addition of different subcarriers at the transmitter. Therefore, a novel randomly assigning prototype filter (RAPF) method is proposed to reduce PAPR in FBMC-OQAM system. Based on the proposed RAPF method, the authors analyse the performances of both PAPR and bit error rate (BER) in the FBMC-OQAM system. Simulation results show that the proposed RAPF method helps to significantly reduce PAPR of FBMC-OQAM system. Meanwhile, compared with conventional FBMC-OQAM system, the proposed RAPF-FBMC-OQAM scheme has almost the same BER performance in the additive white Gaussian noise channel but is descended slightly only in the high signal-to-noise ratio region of the frequency selective fading channel.