Designing Anti-Jamming Receivers for NR-DCSK Systems Utilizing ICA, WPD, and VMD Methods

TL;DR

This paper introduces a novel anti-jamming receiver for NR-DCSK systems that combines VMD, ICA, and WPD methods, significantly improving performance against jamming attacks.

Contribution

A new VMD-ICA-WPD-based anti-jamming receiver design for NR-DCSK systems that enhances jamming mitigation and system robustness.

Findings

Achieves 8 dB performance gain at BER=0.03 and Eb/N0=20 dB

Effectively separates and mitigates jamming signals using combined VMD, ICA, and WPD methods

Outperforms conventional correlation-based receivers in simulated environments.

Abstract

In this work, we consider an advanced noise reduction differential chaotic shift keying (NR-DCSK) system in which a single antenna source communicates with a single antenna destination under the attack of a single antenna jammer. We devote our efforts to design a novel anti-jamming (AJ) receiver for the considered system. Particularly, we propose a variational mode decomposition-independent component analysis-wavelet packet decomposition-based (VMD-ICA-WPD-based) structure, in which the VMD method is firstly exploited to generate multiple signals from the single received one. Secondly, the ICA method is applied to coarsely separate chaotic and jamming signals. After that, the WPD method is used to finely estimate and mitigate jamming signals that exist on all outputs of the ICA method. Finally, an inverse ICA procedure is carried out, followed by a summation, and the outcome is passed through the conventional correlation-based receiver for recovering the transmitted information. Simulation results show that the proposed receiver provides significant system performance enhancement compared to that given by the conventional correlation-based receiver with WPD, i.e. 8 dB gain at BER =0.03 and Eb/N0 = 20 dB.