Fig. 1. Model of the indoor plane

Fig. 2. Model of the illuminance analysis

Fig. 3. Schematic diagram of traditional square matrix layout LED array distribution

Fig. 4. Optimal illuminance distribution of traditional square array layout

Fig. 5. Radiation diagram of Gaussian-like LED under different divergence angles. (a) 15°; (b) 30°

Fig. 6. Schematic diagram of LED emission angle

Fig. 7. Schematic diagram of the LED array distribution in a square room

Fig. 8. Normal coordinate map of the LED center of the No. 1 array in a square room

Fig. 9. Illuminance distribution of receiving plane in square room

Fig. 10. Schematic diagram of the distribution of LED arrays in a rectangular room

Fig. 11. Normal coordinate map of the LED center of the No. 1 array in a rectangular room

Fig. 12. Illuminance distribution of receiving plane in rectangular room

Fig. 13. Optical power distribution on the receiving plane of the traditional layout

Fig. 14. Optical power distribution on the receiving plane of Gaussian-like LED optimized layout. (a) Square room; (b) rectangular room

Fig. 15. SNR distribution on the receiving plane of the traditional layout

Fig. 16. SNR distribution on the receiving plane of Gaussian-like LED optimized layout. (a) Square room; (b) rectangular room

Fig. 17. BER distribution on the receiving plane of the traditional layout

Fig. 18. BER distribution on the receiving plane of Gaussian-like LED optimized layout. (a) Square room; (b) rectangular room