Enhanced Inter-Sub-Band Interference Suppression for Universal Filtered Multi-Carrier Transmission

As one of the 5G physical-layer technique candidates, universal filtered multi-carrier (UFMC) supports sliced spectrum communication by filtering a series of subcarriers. The filter design greatly affects the inter-sub-band interference in UFMC and hence is crucial to the overall system performance. Here we first propose a novel UFMC scheme, namely UFMC-AIC, which incorporates active interference cancellation (AIC) into UFMC to considerably reduce the inter-sub-band interference. Then we propose a modified version of UFMC-AIC which optimizes the weighting factors of the interference cancellation subcarriers (ICSs) under a total power constraint. Simulation results show that the modified UFMC-AIC scheme can achieve higher transmission rate and better BER performance than the conventional UFMC either for AWGN channel or for Rayleigh channel. Moreover, we validate that our proposal can significantly reduce the filter design requirements.

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