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

Xiang Liu1...2, Aiying Yang1,*, Yu Wang1 and Lihui Feng1 |Show fewer author(s)
Author Affiliations
  • 1School of Opto-electronics, Beijing Institute of Technology, Beijing 100081, China
  • 2National Science and Technology Venture Capital Development Center, Beijing 100044, China
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    Figures & Tables(12)
    (a) Arrangement of LED lamps in an indoor environment. (b) LED ID-based positioning scheme for the scenario of a supermarket.
    (a) The structure of the data frame. (b) The ID coordinates of the lamp.
    The rectangular coordinates of 7 LED lamps in a cellular structure.
    (a) The illuminance distribution of 7 LED lamps and (b) the central area.
    (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.
    (a) Arrangement of 3 LEDs in the experiment. (b) The experimental system.
    Received waveform when PD is at the subareas of (a) 1-1 and (b) 1-2 as in Fig. 6(a).
    (a) Received eye diagram of payload data. (b) BER vs distance from the distribution center of an LED.
    Accumulative probability of the positioning error distribution.
    • Table 1. Positioning Bits Transmitted by LED(3,3)1, LED(4,3)2, and LED(4,2)3

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      Table 1. Positioning Bits Transmitted by LED(3,3)1, LED(4,3)2, and LED(4,2)3

      LED LampTime Slot16-bit ID
      LED(3,3)1TS100000011 00000011
      TS200000000 00000000
      TS300000000 00000000
      LED(4,3)2TS100000000 00000000
      TS200000100 00000011
      TS300000000 00000000
      LED(4,2)3TS100000000 00000000
      TS200000000 00000000
      TS300000100 00000010
    • Table 2. Parameters of LEDs Used

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      Table 2. Parameters of LEDs Used

      ParameterValue
      Optical Power of LED chip5 W
      LED’s Bandwidth5.2 MHz
      LED’s View Angle at Half Power15°
      Cell Size (Side Length × Height)1.0m×3.0m
      Height of Receiver Plane0.8 m
    • Table 3. Measured Voltage Amplitude and Estimated Position

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      Table 3. Measured Voltage Amplitude and Estimated Position

      Practical PositionV1(a.u.)V2(a.u.)V3(a.u.)Estimated Position
      1–10.8200LED(3,3)1 sub-area
      1–20.810.250.25LED(3,3)1 sub-area
      2–100.830LED(4,3)2 sub-area
      2–20.250.810.24LED(4,3)2 sub-area
      3–1000.81LED(4,2)3 sub-area
      3–20.240.250.80LED(4,2)3 sub-area
      A0.820.820.01A
      B0.010.820.81B
      C0.810.020.80C
      O0.820.810.81O
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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)

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    Paper Information

    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)

    DOI:10.3788/COL201513.120601

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