Chinese Optics Letters, Volume. 13, Issue 12, 120601(2015)
Combination of light-emitting diode positioning identification and time-division multiplexing scheme for indoor location-based service
Fig. 1. (a) Arrangement of LED lamps in an indoor environment. (b) LED ID-based positioning scheme for the scenario of a supermarket.
Fig. 2. (a) The structure of the data frame. (b) The ID coordinates of the lamp.
Fig. 3. The rectangular coordinates of 7 LED lamps in a cellular structure.
Fig. 4. (a) The illuminance distribution of 7 LED lamps and (b) the central area.
Fig. 5. (a) The bird’s eye view of the illuminance distribution of 7 LED lamps occupying TS1. (b) Illuminance distribution around the center point under an individual LED.
Fig. 6. (a) Arrangement of 3 LEDs in the experiment. (b) The experimental system.
Fig. 7. Received waveform when PD is at the subareas of (a) 1-1 and (b) 1-2 as in Fig.
Fig. 8. (a) Received eye diagram of payload data. (b) BER vs distance from the distribution center of an LED.
Fig. 9. Accumulative probability of the positioning error distribution.
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Xiang Liu, Aiying Yang, Yu Wang, Lihui Feng, "Combination of light-emitting diode positioning identification and time-division multiplexing scheme for indoor location-based service," Chin. Opt. Lett. 13, 120601 (2015)
Category: Fiber Optics and Optical Communications
Received: Aug. 12, 2015
Accepted: Oct. 16, 2015
Published Online: Sep. 12, 2018
The Author Email: Aiying Yang (yangaiying@bit.edu.cn)