Fig. 1. Generalized functional block diagram for integrated system of PLC and VLC^[8]

Fig. 2. Joint channel characteristics of PLC and VLC with 12 PLC taps^[8]

Fig. 3. Measured frequency response curves of typical integrated system of PLC and VLC^[16]

Fig. 4. Block diagram of multicarrier system of integrated PLC and VLC^[12]

Fig. 5. Block diagram of indoor multiuser downlink of integrated VLC and PLC^[11]

Fig. 6. Demonstration setup of PLC & VLC broadcasting system in laboratorial environment^[16]

Fig. 7. Implementation of duplex communication network combining PLC and VLC. (a) LED source with DF module and PLC-VLC coupler; (b) overview of PLC-VLC access network^[14]

Fig. 8. Display of indoor localization system based on VLC and Android APP^[12]. (a) Display of system; (b) receiver (back & front); (c) signal detection in Android APP; (d) map localization in Android APP

Fig. 9. System model of DF relay assisted system combining PLC and VLC^[34]

Fig. 10. Communication system model combining PLC, VLC, and RF^[9]

Fig. 11. Block diagram of wireless optical field monitoring system^[41]

Fig. 12. Wireless optical monitoring device and its main elements^[41]

Fig. 13. WO device anchored on tower of transmission line, and picture of technician adjusting collimators on top of high voltage tower^[41]. (a) WO device anchored on tower of transmission line; (b) picture of technician adjusting collimators on top of high voltage tower