An Asynchronous Visible Light Positioning Method Based on New On-Off Keying Coded Pulse-pair

WANG Zhenghai; XU Mengzhen; MEI Jianeng; LEI Kai; YU Lisu; WANG Yuhao

doi:10.11999/JEIT211568

Volume 44 Issue 8

Aug. 2022

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Article Navigation > Journal of Electronics & Information Technology > 2022 > 44(8): 2677-2685

WANG Zhenghai, XU Mengzhen, MEI Jianeng, LEI Kai, YU Lisu, WANG Yuhao. An Asynchronous Visible Light Positioning Method Based on New On-Off Keying Coded Pulse-pair[J]. Journal of Electronics & Information Technology, 2022, 44(8): 2677-2685. doi: 10.11999/JEIT211568

Citation:

WANG Zhenghai, XU Mengzhen, MEI Jianeng, LEI Kai, YU Lisu, WANG Yuhao. An Asynchronous Visible Light Positioning Method Based on New On-Off Keying Coded Pulse-pair[J]. Journal of Electronics & Information Technology, 2022, 44(8): 2677-2685. doi: 10.11999/JEIT211568

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An Asynchronous Visible Light Positioning Method Based on New On-Off Keying Coded Pulse-pair

doi: 10.11999/JEIT211568

School of Information Engineering, Nanchang University, Nanchang 330031, China

Funds: The National Natural Science Foundation of China (62161023, 62061030, 62161024), China Postdoctoral Science Foundation (2021TQ0136), The State Key Laboratory of Computer Architecture Project (CARCHB202019)

Received Date: 2021-12-27
Rev Recd Date: 2022-03-31

Available Online: 2022-04-19

Publish Date: 2022-08-17

Abstract

Abstract

The popularity of Light-Emitting Diode (LED) lighting provides a green and low-cost solution for high-accuracy indoor positioning. As the most economical LED modulation method, On-Off Keying (OOK) has poor positioning accuracy due to the defects of switching speed, response time, and synchronization between nodes. In this paper, an indoor positioning beacon based on the new OOK coded pulse-pair and its corresponding asynchronous visible light positioning model is proposed. Herein, each LED only needs to perform OOK according to the proposed rules, and the optimal position of the PhotoDetector (PD) terminal under the maximum posterior probability criterion can be estimated. It is verified that when the channel (including LED and receiver) has ideal bandwidth, 200 MHz, and 100 MHz bandwidth, the terminal can achieve a positioning accuracy of 6 mm, 7 mm, and 1 cm with a 90% probability under the condition of 30 dB Signal-to-Noise Ratio (SNR). Under the same conditions, compared with asynchronous Code Division Multiple Access (CDMA) positioning, traditional OOK positioning based on fingerprint and traditional OOK positioning based on received signal strength, the proposed method in this paper can get a significantly better positioning effect. In addition, when the SNR deteriorates from 30 dB to 15 dB, the positioning accuracy of the terminal can also be robustly maintained in the order of centimeters.
- Indoor positioning,
- Asynchronous visible light,
- On-Off Keying (OOK),
- Coded pulse-pair,
- High accuracy

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References(22)

References

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