Optimized design of the light source for an indoor visible light communication system based on an improved bat algorithm

Li Huang; Ping Wang; Jingyu Wang; Sihui Chi; Shuqiang Niu; Xi Nan; Hui Che

doi:10.1364/AO.401990

Applied Optics
Vol. 59,
Issue 34,
pp. 10638-10644
(2020)
•https://doi.org/10.1364/AO.401990

Optimized design of the light source for an indoor visible light communication system based on an improved bat algorithm

Li Huang, Ping Wang, Jingyu Wang, Sihui Chi, Shuqiang Niu, Xi Nan, and Hui Che

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Li Huang, Ping Wang, Jingyu Wang, Sihui Chi, Shuqiang Niu, Xi Nan, and Hui Che, "Optimized design of the light source for an indoor visible light communication system based on an improved bat algorithm," Appl. Opt. 59, 10638-10644 (2020)

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- Fiber Optics, Fiber Sensors, and Optical Communications
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About this Article
History
- Original Manuscript: July 8, 2020
- Revised Manuscript: October 12, 2020
- Manuscript Accepted: October 19, 2020
- Published: November 24, 2020

Abstract

Aiming at the problem of uneven distribution of receiving illuminance and optical power on the receiving plane of the visible light communication (VLC) system, this paper proposes a light source optimization method based on an improved bat algorithm (IBA). Taking the rectangular and hybrid layouts with 16 light-emitting diodes (LEDs), as examples, we set the variance of received light power on the receiving plane as the fitness function. By redesigning the speed update method and local search method of the traditional bat algorithm (BA), the IBA is used to optimize the LED half-power angle and LED position that affect the system performance. The simulation results show that, considering the primary reflection of the wall, the method can reduce the received illumination and optical power fluctuation of the receiving plane within a limited number of iterations under different light source layout schemes.

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Parameter	Value
Room size ($L \times W \times H$)	${5}\;{\rm m} \times 5\;{\rm m} \times 3\;{\rm m}$
Semi-angle at half-power of LED ${\theta _{1/2}}$	${20}^\circ \sim 80^\circ$
Optical power of LED ${P_t}$	0.452 W
The center luminous intensity of the LED $I(0)$	23.81 cd
Height of the receiver	0.85 m
LEDs in each lamp	${7} \times 7$
Interval between LEDs	0.01 m
The FOV of the PD	90°
The area of the PD ${A_{{\rm PD}}}$	$1\;{{\rm cm}^{2}}$
The gain of optical filter ${T_s}(\psi)$	1
The optical concentrator gain $G(\psi)$	1
The photoelectric transformation efficiency $r$	0.35 A/W
Population size $N$	200
The number of dimensions $D$	18, 19
Max iteration times $T$	100

$S$	$l$	$\theta _{1/2}^1$	$\theta _{1/2}^2$	$\theta _{1/2}^3$	$\theta _{1/2}^4$	$\theta _{1/2}^5$	$\theta _{1/2}^6$	$\theta _{1/2}^7$
0.1 m	1.6 m	23.63°	26.16°	26.16°	23.63°	26.16°	30.78°	30.78°
$\theta _{1/2}^8$	$\theta _{1/2}^9$	$\theta _{1/2}^{10}$	$\theta _{1/2}^{11}$	$\theta _{1/2}^{12}$	$\theta _{1/2}^{13}$	$\theta _{1/2}^{14}$	$\theta _{1/2}^{15}$	$\theta _{1/2}^{16}$
26.16°	26.16°	30.78°	30.78°	26.16°	23.63°	26.16°	26.16°	23.63°

$R$	$a$	$b$	$\theta _{1/2}^1$	$\theta _{1/2}^2$	$\theta _{1/2}^3$	$\theta _{1/2}^4$	$\theta _{1/2}^5$	$\theta _{1/2}^6$	$\theta _{1/2}^7$
2.4 m	0.1 m	0.1 m	31.28°	31.29°	31.48°	31.44°	43.94°	70.23°	67.47°
$\theta _{1/2}^8$	$\theta _{1/2}^9$	$\theta _{1/2}^{10}$	$\theta _{1/2}^{11}$	$\theta _{1/2}^{12}$	$\theta _{1/2}^{13}$	$\theta _{1/2}^{14}$	$\theta _{1/2}^{15}$	$\theta _{1/2}^{16}$	/
39.63°	39.62°	68.67°	32.26°	68.71°	39.61°	39.70°	67.12°	32.34°	/

Parameter	Value
Room size ($L \times W \times H$)	${5}\;{\rm m} \times 5\;{\rm m} \times 3\;{\rm m}$
Semi-angle at half-power of LED ${\theta _{1/2}}$	${20}^\circ \sim 80^\circ$
Optical power of LED ${P_t}$	0.452 W
The center luminous intensity of the LED $I(0)$	23.81 cd
Height of the receiver	0.85 m
LEDs in each lamp	${7} \times 7$
Interval between LEDs	0.01 m
The FOV of the PD	90°
The area of the PD ${A_{{\rm PD}}}$	$1\;{{\rm cm}^{2}}$
The gain of optical filter ${T_s}(\psi)$	1
The optical concentrator gain $G(\psi)$	1
The photoelectric transformation efficiency $r$	0.35 A/W
Population size $N$	200
The number of dimensions $D$	18, 19
Max iteration times $T$	100

$S$	$l$	$\theta _{1/2}^1$	$\theta _{1/2}^2$	$\theta _{1/2}^3$	$\theta _{1/2}^4$	$\theta _{1/2}^5$	$\theta _{1/2}^6$	$\theta _{1/2}^7$
0.1 m	1.6 m	23.63°	26.16°	26.16°	23.63°	26.16°	30.78°	30.78°
$\theta _{1/2}^8$	$\theta _{1/2}^9$	$\theta _{1/2}^{10}$	$\theta _{1/2}^{11}$	$\theta _{1/2}^{12}$	$\theta _{1/2}^{13}$	$\theta _{1/2}^{14}$	$\theta _{1/2}^{15}$	$\theta _{1/2}^{16}$
26.16°	26.16°	30.78°	30.78°	26.16°	23.63°	26.16°	26.16°	23.63°

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Applied Optics