Optimization Algorithm of Receiver Optical Power Uniformity in Indoor Visible Light Communication

Parameter	Value
Room size /m³	5×5×3
Receive height H_PD /m	0.8
Transmitted power of lamp P_t /mW	452
Semi-angle at half-power Φ_1/2 /(°)	70
Number of LED in each lamp	5×5
LED interval /m	0.01
Gain of optical filter T_s (ψ)	1
Gain of optical concentrator g(ψ)	1
Fiele-of-view ψ_FOV /(°)	55
Physical area of photo-detector A /cm²	1
Photoelectric conversion efficiency /(A·W^-1)	0.53
Refractive index of lens on PD n	1.5
Central luminous intensity of LED I(0) /cd	23.81
Distance between adjacent arrays d /m	1

Table 2. Parameter setting of three algorithms
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Table 2. Parameter setting of three algorithms
Algorithm Populationsize Number ofiterations Otherparametervalue
GA 100 200 P_c=0.3,P_m=0.05
AGA 100 200 k₁=k₂=0.9,k₃=k₄=0.05
IGA 100 200 P_{c_max}=0.9,P_{c_min}=0.1P_{m_max}=0.05,P_{m_min}=0.01

Table 3. Parameters of the four methods

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Table 3. Parameters of the four methods

Algorithm	Minimum receivingpower /dBm	Maximum receivingpower /dBm	Average receivingpower /dBm	Received powervariance /dBm	Illuminationrange /lx
Method beforeoptimization	-3.18	-0.78	-1.68	3.02	374-862
GA	-2.17	-0.59	-1.40	2.04	455-917
AGA	-2.02	-0.66	-1.15	1.87	424-791
IGA	-1.52	-0.66	-1.02	1.16	417-765

Table 4. Parameters of the three methods
View table
Table 4. Parameters of the three methods
Algorithm Maximumreceivingpower /dBm Minimumreceivingpower /dBm Receivedpowervariance /dBm
ACO -7.40 -9.98 19.27
GDGA -3.25 0.54 1.32
IGA -0.66 -1.52 1.16

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Chen Yong, Shen Qixiang, Liu Huanlin. Optimization Algorithm of Receiver Optical Power Uniformity in Indoor Visible Light Communication[J]. Chinese Journal of Lasers, 2018, 45(5): 506003

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