Physical Layer Security for Vehicle-to-Vehicle Visible Light Communication Using Artificial Noise

Abstract

This work addresses the possibility of vehicle-to-vehicle visible light communication (V2V VLC) protection. As one of the most appropriate kinds of artificial noise, Gaussian noise was added through one headlight and the other was used to send data, with Pulse Position Modulation (PPM) on a GNU Radio-based system and Red Pitaya FPGA as it was done. Experiments that were conducted with three levels of noise (0.01, 0.05, 0.07) have shown that growing artificial noise causes the success of data transmission to be reduced, yet the privacy of links improved. The DLH / NRH arrangement reported great success levels and above the NLH / DRH. The obstacles were synchronization errors, anomaly detection and differences in the beam patterns of the headlights. The results reveal that various security layers can be offered by using artificial noise jamming to secure a V2V VLC without the mere use of encryption. This demonstrates how lightweight, hardware-based methods might improve data secrecy in vehicle networks. The solution also shows that physical-layer security measures can be successfully integrated with low-cost platforms in real-world V2V VLC settings. Future research could investigate dynamic beam steering or adaptive noise levels to further balance the trade-off between secrecy and connection reliability.