Indoor Visible Light Fingerprint Positioning Scheme Based on Improved ShuffleNet V2

Table 1. Fingerprint database
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Table 1. Fingerprint database
Reference point Coordinate RSS AOA
1 x₁ y₁ P₁₁ P₁₂ P₁₃ P₁₄ $α_{11}$ $α_{12}$ $α_{13}$ $α_{14}$
2 x₂ y₂ P₂₁ P₂₂ P₂₃ P₂₄ $α_{21}$ $α_{22}$ $α_{23}$ $α_{24}$
3 x₃ y₃ P₃₁ P₃₂ P₃₃ P₃₄ $α_{31}$ $α_{32}$ $α_{33}$ $α_{34}$
︙ ︙ ︙ ︙ ︙ ︙ ︙ ︙ ︙ ︙ ︙
N x_N y_N P_N₁ P_N₂ P_N₃ P_N₄ $α_{N 1}$ $α_{N 2}$ $α_{N 3}$ $α_{N 4}$

Table 2. Parameters used in channel simulation

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Table 2. Parameters used in channel simulation

Parameter	Value	Parameter	Value
Transmitted optical power P_t /W	1	Absolute temperature T_k /K	300
Fied of view ψ_FOV /（°）	60	Open-circuit voltage gain G	10
Semi-angle at half power ϕ_1/2 /（°）	70	FET transconductance g_m /mS	30
Noise factor Γ	1.5	Noise bandwidth factor I₂	0.562
Gain of optical filter T_s（ψ）	1	Noise bandwidth factor I₃	0.0868
Modulation bandwidth B /MHz	100	Photovoltaic conversion efficiency R /（A·W^-1）	0.54
PD receiving area A /cm²	1	Fixed capacitance per unit area C_pd /（pF·cm^-2）	112
Dark current I_bg /μA	5100	Concentrator gain g（ψ）	1.5

Table 3. Comparison of positioning error, parameter number and time of different algorithms

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Table 3. Comparison of positioning error, parameter number and time of different algorithms

Positioning algorithm	Maximum positioning error /cm	Average positioning error /cm	Total parameter number	Training parameter number	Untrained parameter number	Positioning time /ms
2-stage （5 blocks）	9.25	2.30	384726	378154	6572	174
2-stage （6 blocks）	9.98	2.55	414074	406806	7268	229
2-stage （7 blocks）	11.72	2.72	443422	435458	7964	278
Complete 2-stage	11.94	2.88	472770	464110	8660	343
Complete 3-stage	11.67	3.12	986882	973118	13764	452

Table 4. Positioning error for different fingerprint feature network models
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Table 4. Positioning error for different fingerprint feature network models
Positioning algorithm Maximum positioning error Average positioning error
RSS-CNN 25.12 4.44
RSS-SV2 31.06 5.01
RSS/AOA-SV2 9.25 2.30
RSS/AOA-CNN 16.58 4.09

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Jia Qu, Xudong Wang, Nan Wu. Indoor Visible Light Fingerprint Positioning Scheme Based on Improved ShuffleNet V2[J]. Chinese Journal of Lasers, 2024, 51(13): 1306004

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