  N-continuous orthogonal frequency division multiplexing (NC-OFDM) was
demonstrated to provide significant sidelobe suppression for baseband OFDM
signals. However, it will introduce severe interference to the transmit
signals. Hence in this letter, we specifically design a class of
low-interference NC-OFDM schemes for alleviating the introduced interference.
Meanwhile, we also obtain an asymptotic spectrum analysis by a closed-form
expression. It is shown that the proposed scheme is capable of reducing the
interference to a negligible level, and hence to save the high complexity of
signal recovery at the receiver, while maintaining similar sidelobe suppression
performance compared to traditional NC-OFDM.
