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Iterative Interference Cancellation in FBMC-QAM Systems

In this paper, we evaluate iterative interference cancellation (IIC) as a method to remove the intrinsic interference terms in filter bank multicarrier - quadrature amplitude modulation (FBMC-QAM) systems. We propose an IIC receiver that separates the received signal into even- and odd-numbered subcarrier components and use the demodulated even- and odd-numbered subcarrier symbols to iteratively remove the effect of interference. Numerical results show that the out-of-band emission performance of the IIC FBMC-QAM system is superior to that of OFDM and conventional FBMC-QAM. Bit error rate (BER) simulation results also indicate that the proposed IIC FBMC-QAM can effectively improve BER performance under different time-varying channels.