Improved Interference Cancellation Method in FBMC/OQAM system on PAPR reduction

In the filter bank multicarrier with offset quadrature amplitude modulation (FBMC/OQAM) system, the Interference Cancellation Method (ICM) is an effective channel estimation method. However, the system's excessively high peak-to-average power ratio (PAPR) will cause signal distortion and affect the channel estimation performance when passing through the power amplifier at the transmitting end. Aiming to reduce the high PAPR of the system, the improved Interference Cancellation Method with phase rotation (I-ICM) is proposed. I-ICM generates different phase sequences, which are multiplied with transmission data to obtain different Data sequences and calculate its PAPR, respectively, and then select the group with the lowest PAPR for transmission. It is verified by simulation that I-ICM can reduce the high PAPR of the system, the bit error rate (BER) is reduced, and the channel estimation performance is not significantly lower compared with ICM.