Combination of light-emitting diode positioning identification and time-division multiplexing scheme for indoor location-based service

Xiang Liu; Aiying Yang; Yu Wang; Lihui Feng

doi:10.3788/COL201513.120601

Journals >Chinese Optics Letters >Volume 13 >Issue 12 >Page 120601 > Article

Chinese Optics Letters
Vol. 13, Issue 12, 120601 (2015)

Combination of light-emitting diode positioning identification and time-division multiplexing scheme for indoor location-based service

Xiang Liu^1、2, Aiying Yang^1、*, Yu Wang¹, and Lihui Feng¹

Author Affiliations

¹School of Opto-electronics, Beijing Institute of Technology, Beijing 100081, China

²National Science and Technology Venture Capital Development Center, Beijing 100044, China

show less

DOI: 10.3788/COL201513.120601 Cite this Article Set citation alerts

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[J]. Chinese Optics Letters, 2015, 13(12): 120601 Copy Citation Text

EndNote(RIS)

BibTex

Plain Text

show less

Fig. 1. (a) Arrangement of LED lamps in an indoor environment. (b) LED ID-based positioning scheme for the scenario of a supermarket.

Download full size | View in the Article

Fig. 2. (a) The structure of the data frame. (b) The ID coordinates of the lamp.

Download full size | View in the Article

Fig. 3. The rectangular coordinates of 7 LED lamps in a cellular structure.

Download full size | View in the Article

Fig. 4. (a) The illuminance distribution of 7 LED lamps and (b) the central area.

Download full size | View in the Article

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.

Download full size | View in the Article

Fig. 6. (a) Arrangement of 3 LEDs in the experiment. (b) The experimental system.

Download full size | View in the Article

Fig. 7. Received waveform when PD is at the subareas of (a) 1-1 and (b) 1-2 as in Fig. 6(a).

Download full size | View in the Article

Fig. 8. (a) Received eye diagram of payload data. (b) BER vs distance from the distribution center of an LED.

Download full size | View in the Article

Fig. 9. Accumulative probability of the positioning error distribution.

Download full size | View in the Article

LED Lamp	Time Slot	16-bit ID
${LED}_{(3, 3)}^{1}$	TS1	00000011 00000011
	TS2	00000000 00000000
	TS3	00000000 00000000
${LED}_{(4, 3)}^{2}$	TS1	00000000 00000000
	TS2	00000100 00000011
	TS3	00000000 00000000
${LED}_{(4, 2)}^{3}$	TS1	00000000 00000000
	TS2	00000000 00000000
	TS3	00000100 00000010

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

View in the Article

Parameter	Value
Optical Power of LED chip	5 W
LED’s Bandwidth	5.2 MHz
LED’s View Angle at Half Power	15°
Cell Size (Side Length × Height)	$1.0 m \times 3.0 m$
Height of Receiver Plane	0.8 m

Table 2. Parameters of LEDs Used

View in the Article

Practical Position	$V_{1}$ (a.u.)	$V_{2}$ (a.u.)	$V_{3}$ (a.u.)	Estimated Position
1–1	0.82	0	0	${LED}_{(3, 3)}^{1}$ sub-area
1–2	0.81	0.25	0.25	${LED}_{(3, 3)}^{1}$ sub-area
2–1	0	0.83	0	${LED}_{(4, 3)}^{2}$ sub-area
2–2	0.25	0.81	0.24	${LED}_{(4, 3)}^{2}$ sub-area
3–1	0	0	0.81	${LED}_{(4, 2)}^{3}$ sub-area
3–2	0.24	0.25	0.80	${LED}_{(4, 2)}^{3}$ sub-area
A	0.82	0.82	0.01	A
B	0.01	0.82	0.81	B
C	0.81	0.02	0.80	C
O	0.82	0.81	0.81	O