Author Affiliations
1Faculty of Automation and Information Engineering, Xi''an University of Technology, Xi''an, Shaanxi 710048, China2Shaanxi Civil-Military Integration Key Laboratory of Intelligence Collaborative Networks,Xi''an, Shaanxi 710000, China3System Research Institute of Hubei''s Space Technology Academe, Wuhan, Hubei 430040, Chinashow less
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
Parameter | Value |
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Single optical power/W | 0.5 | Half power angle/(°) | 60 | Center luminous intensity/cd | 21.5 | Photodiode responsivity/(A·W-1) | 0.53 | Refractive index of a lens at a PD | 1.5 | Field of view at receiver/(°) | 70 | Photosensitive area size of PD/cm2 | 1 | Gain of an optical filter | 1 | Noise bandwidth factor | 0.562 | Reflectivity of wall | 0.8 | Background noise current/mA | 0.62 | Load resistance /kΩ | 10 | Equivalent noise bandwidth /MHz | 200 |
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Table 1. Simulation parameter of traditional layout