基于多节点协作的鲁棒可见光智能定位

doi:10.11959/j.issn.1000-0801.2023103

Abstract

Abstract:

Visible light communication is expected to be one of the key alternative technologies for 6G with the advantages of abundant spectrum resources, less susceptibility to electromagnetic pollution and green safety, which also provides a new idea for high-precision indoor positioning.However, the positioning accuracy can be significantly degraded in the harsh indoor environment where LED that can be used as an anchor is insufficient or severely blocked.Therefore, a robust visible light intelligent positioning method based on multi-node cooperation was investigated.Considering the non-line-of-sight propagation of visible light and the dynamic change of user terminal orientation, a cooperative localization mechanism between user terminals was established to obtain mutual information gain and a convolutional-recurrent neural network was designed, and the theoretical analysis of cooperative localization accuracy performance was carried out.Simulation results show that the introduction of the cooperative localization mechanism can effectively improve positioning performance under harsh conditions.

Key words: visible light positioning, cooperative localization, convolutional-recurrent neural network, non-line-of sight propagation

CLC Number:

TP393

Sicong LIU, Danping SU, Tiankuo WEI, Xianyao WANG. Multi-node cooperation based robust visible light intelligent positioning[J]. Telecommunications Science, 2023, 39(5): 28-41.

Figures/Tables 6

参数	值
房间的尺寸 $L \times W \times H$	5 m×5 m×3 m
LED的半功率角 $θ_{1 / 2}$	45^°
LED数量N	4
三维空间的尺寸 $l \times w \times h$	5 m×5 m×1.5 m
光电探测器数量K	2、4、6
光电探测器的响应度 $R_{opto-elec}$	0.68
墙壁反射系数ρ	77%
墙壁总反射区域的数量Q	180
光电探测器的视场角 $ϕ_{FOV}$	60^°
光电探测器的接收面积 $A_{opto-elec}$	2 cm ²
光学滤波器的增益 $T (ϕ)$	1.5
光学集中器的增益 $g (ϕ)$	1
主节点的状态数量	1.0×10⁶
室内路径损耗系数ζ	2.5
参考路径损耗 $PL (D_{0})$	41.5 dB
标准偏差σ	5

References 30

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