Low Complexity Null Subcarrier-Assisted OFDM PAPR Reduction with Improved BER

TL;DR

This paper introduces a low-complexity OFDM PAPR reduction method using data-null subcarrier switching that enhances BER performance and significantly reduces system complexity with minimal PAPR reduction compromise.

Contribution

It proposes a novel data-null subcarrier switching scheme for OFDM that greatly reduces system complexity while improving BER and maintaining effective PAPR reduction.

Findings

Achieves up to 3 dB SNR gain.

Reduces system complexity by over 98%.

Provides a slight trade-off in PAPR reduction.

Abstract

In this letter, we propose a low complex data-null subcarrier switching-based peak-to-average power ratio (PAPR) reduction scheme for the orthogonal frequency division multiplexing (OFDM) systems, which provides improved bit error rate. We perform the switching between the data and null subcarriers in such a way that distance between any two switched-null subcarriers remains constant. This method can achieve up to 3 dB signal-to-noise ratio gain and shed the system complexity by more than 98% of the conventional systems, with a slight compromise of the PAPR reduction capability.