A Class of Low-Interference N-Continuous OFDM Schemes

TL;DR

This paper introduces a new class of low-interference NC-OFDM schemes that effectively reduce interference while maintaining sidelobe suppression, supported by an asymptotic spectrum analysis.

Contribution

A novel low-interference NC-OFDM scheme is proposed, balancing sidelobe suppression with minimal interference and simplified receiver complexity.

Findings

Significant sidelobe suppression achieved

Interference reduced to negligible levels

Simplified signal recovery at receiver

Abstract

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.