Spectral and energy efficiency of aco-ofdm in visible light communication systems Shuai Ma, Ruixin Yang, Xiong Deng, Xintong Ling, Xun Zhang, Fuhui Zhou, Shiyin Li, Derrick Wing Kwan Ng January 2021 Cite Next On Improving 5G Internet of Radio Light Security Based on LED Fingerprint Identification Method Previous Study of RSS-based indoor positioning system for target using visible light communication