A reliable sunlight communication system

Haichao Guo; Tao Shan; Li Li; Li Zhang; Xiaojun Li; Han Gao

doi:doi:10.3788/COL201917.120605

Chinese Optics Letters, 2019, 17 (12): 120605, Published Online: Dec. 5, 2019

A reliable sunlight communication system Download： 647次

Haichao Guo ^1,2,3Tao Shan ^1,*Li Li ³Li Zhang ³Xiaojun Li ³Han Gao ⁴

Author Affiliations

¹ School of Information and Electronics, Beijing Institute of Technology, Beijing 100081, China

² National Key Laboratory of Science and Technology on Space Microwave, Xi’an 710100, China

³ China Academy of Space Technology (Xi’an), Xi’an 710100, China

⁴ Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China

Figures & Tables

Table1. Communication Delay Time and Time Edge Measurement

Experiment	With Phosphors (μs)	Without Phosphors (μs)	Results (μs)
Delta delay	6.0	5.7	0.3
Rising edge (20%–80%)	1.3	1.1	0.2

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Table2. Comparison of Ordinary Communication and Spectral Regulated Communication

Parameter		Ordinary Comm.	Spectral-Regulated Comm.
Compound parabolic concentrator aperture	$D_{0}$	200 mm	200 mm
Loss of gathering and transmission channel	$ρ_{F}$	0.4	0.4
Transmission divergence angle	$θ_{T}$	10 mrad	0.2 mrad
Transmission power	$P_{T}$	10 W	0.8 W
Loss of receiving channel	$ρ_{S}$	0.3	0.3
Transmitting antenna aperture	$D_{T}$	300 mm	300 mm
Communication bandwidth	$B$	10 MHz	10 MHz
Receiving field of view	$θ_{R}$	10 mrad	10 mrad
Communication wavelength	$λ$	400 nm–700 nm	655 ± 5 nm
Receiving antenna aperture	$D_{R}$	300 mm	300 mm
Maximum photodetector response	$R$	0.6	0.6
Background total brightness	$L_{0}$	$100 {W / m}^{2} \cdot gsr$	$100 {W / m}^{2} \cdot gsr$
Power of receiving background light	$P_{Be}$	$1.11 \times 10^{- 5}$	$3.4 \times 10^{- 7}$
Communication distance	$L_{1}$	210 km	210 km
Signal to noise ratio	$SNR$	3.15 dB	64.19 dB

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Haichao Guo, Tao Shan, Li Li, Li Zhang, Xiaojun Li, Han Gao. A reliable sunlight communication system[J]. Chinese Optics Letters, 2019, 17(12): 120605.

A reliable sunlight communication system Download： 647次

Fig. 1. Basic composition of sunlight communication system.

Fig. 2. Experimental setup for LED communication.

Fig. 3. Experimental setup for sunlight communication system.

Fig. 4. Signal eye diagram (a) without phosphors and (b) with phosphors.

Fig. 5. Measured sunlight intensity values.

Fig. 6. Sunlight communication experiment and composition.

Fig. 7. Change in the SNR with respect to increasing distance.

Table1. Communication Delay Time and Time Edge Measurement

Table2. Comparison of Ordinary Communication and Spectral Regulated Communication

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A reliable sunlight communication system Download： 647次

Fig. 1. Basic composition of sunlight communication system.

Fig. 2. Experimental setup for LED communication.

Fig. 3. Experimental setup for sunlight communication system.

Fig. 4. Signal eye diagram (a) without phosphors and (b) with phosphors.

Fig. 5. Measured sunlight intensity values.

Fig. 6. Sunlight communication experiment and composition.

Fig. 7. Change in the SNR with respect to increasing distance.

Table1. Communication Delay Time and Time Edge Measurement

Table2. Comparison of Ordinary Communication and Spectral Regulated Communication

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