Jamming Modulation: An Active Anti-Jamming Scheme

TL;DR

This paper introduces an active anti-jamming scheme that exploits jamming signals as carriers for communication, significantly improving reliability and capacity under strong broadband jamming attacks.

Contribution

The novel AAJ scheme actively re-modulates jamming signals for communication, providing a new approach that outperforms direct transmission in high JNR scenarios.

Findings

The AAJ scheme achieves reliable communication under strong broadband jamming.

It outperforms direct transmission in channel capacity at high JNR.

The scheme's BER performance is characterized with optimal detection thresholds.

Abstract

Providing quality communications under adversarial electronic attacks, e.g., broadband jamming attacks, is a challenging task. Unlike state-of-the-art approaches which treat jamming signals as destructive interference, this paper presents a novel active anti-jamming (AAJ) scheme for a jammed channel to enhance the communication quality between a transmitter node (TN) and receiver node (RN), where the TN actively exploits the jamming signal as a carrier to send messages. Specifically, the TN is equipped with a programmable-gain amplifier, which is capable of re-modulating the jamming signals for jamming modulation. Considering four typical jamming types, we derive both the bit error rates (BER) and the corresponding optimal detection thresholds of the AAJ scheme. The asymptotic performances of the AAJ scheme are discussed under the high jamming-to-noise ratio (JNR) and sampling rate cases. Our analysis shows that there exists a BER floor for sufficiently large JNR. Simulation results indicate that the proposed AAJ scheme allows the TN to communicate with the RN reliably even under extremely strong and/or broadband jamming. Additionally, we investigate the channel capacity of the proposed AAJ scheme and show that the channel capacity of the AAJ scheme outperforms that of the direct transmission when the JNR is relatively high.