Working Range of Vehicle-Mounted Visible Light Communication System

Fig. 3. Influence of movement direction on received power of direct path of headlamp. (a) Received power of direct path of low beam; (b) received power of direct path of high beam

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Fig. 4. Power distribution of automobile headlamp on road surface. (a) Low beam; (b) high beam

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Fig. 5. Received power of primary reflection link on different road surfaces

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Fig. 6. Influence of roadside vehicle position on received power of diffuse reflection link. (a) Low beam; (b) high beam

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Fig. 7. Relationship between signal-to-noise ratio of vehicle-mounted visible light communication system and relative speed between signal transmitter and signal receiver in foggy weather.（a）Signal-to-noise ratio of low beam in foggy days；（b）signal-to-noise ratio of high beam in foggy days

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Table 1. Relationship between fog level and horizontal visibility
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Table 1. Relationship between fog level and horizontal visibility
Grade Horizontal visibility /m
0（Dense fog）［0，50）
1（Fog）［50，200）
2（Medium fog）［200，500）
3（Light fog）［500，1000）
4（Mist）［1000，2000）

Table 2. System parameters

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Table 2. System parameters

Parameter	Value
Half power angle of high beam $Φ_{1 / 2, h i g h}$ /（°）	15
Half power angle of low beam $Φ_{1 / 2, l o w}$ /（°）	80
Receiver viewing angle $ψ_{c}$ /（°）	45
Optical filter gain $T_{S} (ψ_{c})$	1.7
Effective area of photodetector $A_{r}$ /cm²	1
Transmitting power $P_{t}$ /W	1
Light gathering gain $g (ψ_{c})$	0.8
Road width $y$ /m	7
Height of lamp from ground $h$ /m	0.9

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Ying Zhang, Yaru Lei, Chaojun Huang. Working Range of Vehicle-Mounted Visible Light Communication System[J]. Laser & Optoelectronics Progress, 2021, 58(17): 1706002

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