Fig. 1. Geometric scene radiation model of VLC system

Fig. 2. Channel gain simulation diagram of indoor VLC system

Fig. 3. VLC system schematic diagram based on NOMA-DCO-OFDM

Fig. 4. Schematic diagram of SIC test

Fig. 5. Comparison of NOMA-based and OFDM-based VLC system communication rate

Fig. 6. User 1 and user 2 constellation before demodulation. (a) User 1;(b) User 2

Fig. 7. BER performance curve

Fig. 8. NOMA-DCO-OFDM experimental environment