| Semiconductor light emitting diode(LED)are becoming the next generation of mainstream lighting sources due to their long life,small size,and environmental friendliness.At the same time,LED has the characteristics of high-speed modulation,and it can be used as a signal transmitter to construct an indoor optical wireless communication(OWC)positioning system.In the indoor scene,compared with the traditional positioning technology,the OWC positioning system has the advantages of high positioning accuracy,simple system,environmental protection,no electromagnetic interference,and low cost.With the increasing demand for indoor high-precision positioning,indoor positioning technology based on optical wireless communication will certainly become a mainstream trend.In view of this situation,this paper builds a complex indoor OWC mobile channel model based on the research of indoor optical wireless communication positioning technology,proposes a fitting multi-sensor fitting prediction positioning algorithm,and carries out theoretical derivation and experimental verification;This paper also proposes a cell handover algorithm that equalizes the communication rate and communication distance,and simulates the algorithm.The photoelectric conversion and T-feedback resistor network amplification circuit,shaping comparator circuit,voltage detection circuit,and power supply circuit suitable for indoor optical wireless communication are designed.Finally,a wireless optical duplex communication system will be implemented to achieve high-precision positioning of indoor mobile robots.Tests have shown that when the moving speed is 1.5m/s,the positioning accuracy is 23 cm,and the cell switching frequency is reduced 60%-70% and the communication interruption rate is reduced. |
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