A Low-Cost Visible-Light-Communication-Enhancing Downlink Relay for Future Ultra-Massive IoT Networks Dayu Shi, Xun Zhang, Lianxin Hu, Zefeng Wang, Wenjun Hu, Andrei Vladimirescu January 2022 Cite Next Visible Light Positioning With Lens Compensation for Non-Lambertian Emission Previous AlexNet-based Visible light communication devices fingerprint extraction and authentication in broadcast systems