研究目的
To design and evaluate the accuracy of a RSS-based visible light positioning implementation for indoor environments.
研究成果
The designed visible light positioning system achieves an error below 3 cm in distance estimation within the tested range, demonstrating its suitability for indoor positioning applications. The system's performance is robust, with negligible spread on the received power, making it viable for use with multiple unsynchronized transmitters.
研究不足
The system's accuracy is affected by the manual placement of the receiver and the tolerance of the distance measurement device. Additionally, the presence of reflecting surfaces introduces errors due to the non-line-of-sight component.
1：Experimental Design and Method Selection:
The study focuses on designing a transmitter and receiver for indoor visible light positioning, utilizing a Lambertian radiation model for the LED and a calibration method to estimate distances without synchronization.
2：Sample Selection and Data Sources:
Measurements are conducted on a straight line from directly under the LED to a planar distance of 3 m, with steps of
3：2 m. List of Experimental Equipment and Materials:
Includes a Bridgelux BXRE-50C3001-D-24 LED, LTC3783 LED driver, Thorlabs PDA36EC2 receiver module, and a National Instruments USB-6212 data acquisition system.
4：Experimental Procedures and Operational Workflow:
The receiver captures 2x10^4 periods of the transmitted signal at each location, with the DFT used to analyze the first harmonic component for distance estimation.
5：Data Analysis Methods:
The DFT is applied to the received signal to estimate the distance between transmitter and receiver, with calibration used to account for system parameters.
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