Fig. 1. Block diagram of visible light single-source full-duplex communication system

Fig. 2. Equivalent model of defocused cat eye inverse modulator

Fig. 3. Modulation signal diagram. (a) Primary modulation signal; (b) secondary modulation signal

Fig. 4. LED driver circuit

Fig. 5. Photoelectric receiving circuit

Fig. 6. Schematic of signal processing circuit

Fig. 7. Inverse modulated indoor visible light full-duplex communication system. (a) Reverse terminal; (b) active terminal

Fig. 8. Video transmission experiment

Fig. 9. Downlink communication signal. (a) Active terminal sending signal; (b) reverse terminal receiving signal

Fig. 10. Secondary modulation signal and power spectrum. (a) Secondary modulation signal; (b) signal power spectrum

Fig. 11. Uplink signal. (a) Signal of reverse terminal; (b) signal of active terminal

Fig. 12. Relation of BER and transmission distance