An Indoor Visible Light Positioning System Using Tilted LEDs with High Accuracy
The accuracy of the received signal strength-based visible light positioning (VLP) system in indoor applications is constrained by the tilt angles of transmitters (Txs) and receivers as well as multipath reflections. In this paper, for the first time, we show that tilting the Tx can be beneficial in...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/21/3/920 |
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| author | Neha Chaudhary Othman Isam Younus Luis Nero Alves Zabih Ghassemlooy Stanislav Zvanovec Hoa Le-Minh |
| author_facet | Neha Chaudhary Othman Isam Younus Luis Nero Alves Zabih Ghassemlooy Stanislav Zvanovec Hoa Le-Minh |
| author_sort | Neha Chaudhary |
| collection | DOAJ |
| description | The accuracy of the received signal strength-based visible light positioning (VLP) system in indoor applications is constrained by the tilt angles of transmitters (Txs) and receivers as well as multipath reflections. In this paper, for the first time, we show that tilting the Tx can be beneficial in VLP systems considering both line of sight (LoS) and non-line of sight transmission paths. With the Txs oriented towards the center of the receiving plane (i.e., the pointing center F), the received power level is maximized due to the LoS components on F. We also show that the proposed scheme offers a significant accuracy improvement of up to ~66% compared with a typical non-tilted Tx VLP at a dedicated location within a room using a low complex linear least square algorithm with polynomial regression. The effect of tilting the Tx on the lighting uniformity is also investigated and results proved that the uniformity achieved complies with the European Standard EN 12464-1. Furthermore, we show that the accuracy of VLP can be further enhanced with a minimum positioning error of 8 mm by changing the height of F. |
| first_indexed | 2024-03-09T03:17:15Z |
| format | Article |
| id | doaj.art-ba5dc6456fc14b469c75b6648ac87046 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-09T03:17:15Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-ba5dc6456fc14b469c75b6648ac870462023-12-03T15:17:27ZengMDPI AGSensors1424-82202021-01-0121392010.3390/s21030920An Indoor Visible Light Positioning System Using Tilted LEDs with High AccuracyNeha Chaudhary0Othman Isam Younus1Luis Nero Alves2Zabih Ghassemlooy3Stanislav Zvanovec4Hoa Le-Minh5Instituto de Telecomunicações and Departamento de Electrónica, Telecomunicações e Informática, Universidade de Aveiro, 3810-193 Aveiro, PortugalOptical Communications Research Group, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UKInstituto de Telecomunicações and Departamento de Electrónica, Telecomunicações e Informática, Universidade de Aveiro, 3810-193 Aveiro, PortugalOptical Communications Research Group, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UKDepartment of Electromagnetic Field, Faculty of Electrical Engineering, Czech Technical University in Prague, 16627 Prague, Czech RepublicOptical Communications Research Group, Faculty of Engineering and Environment, Northumbria University, Newcastle upon Tyne NE1 8ST, UKThe accuracy of the received signal strength-based visible light positioning (VLP) system in indoor applications is constrained by the tilt angles of transmitters (Txs) and receivers as well as multipath reflections. In this paper, for the first time, we show that tilting the Tx can be beneficial in VLP systems considering both line of sight (LoS) and non-line of sight transmission paths. With the Txs oriented towards the center of the receiving plane (i.e., the pointing center F), the received power level is maximized due to the LoS components on F. We also show that the proposed scheme offers a significant accuracy improvement of up to ~66% compared with a typical non-tilted Tx VLP at a dedicated location within a room using a low complex linear least square algorithm with polynomial regression. The effect of tilting the Tx on the lighting uniformity is also investigated and results proved that the uniformity achieved complies with the European Standard EN 12464-1. Furthermore, we show that the accuracy of VLP can be further enhanced with a minimum positioning error of 8 mm by changing the height of F.https://www.mdpi.com/1424-8220/21/3/920localizationvisible light communicationvisible light positioningreceived signal strengthlinear least squarepolynomial regression |
| spellingShingle | Neha Chaudhary Othman Isam Younus Luis Nero Alves Zabih Ghassemlooy Stanislav Zvanovec Hoa Le-Minh An Indoor Visible Light Positioning System Using Tilted LEDs with High Accuracy Sensors localization visible light communication visible light positioning received signal strength linear least square polynomial regression |
| title | An Indoor Visible Light Positioning System Using Tilted LEDs with High Accuracy |
| title_full | An Indoor Visible Light Positioning System Using Tilted LEDs with High Accuracy |
| title_fullStr | An Indoor Visible Light Positioning System Using Tilted LEDs with High Accuracy |
| title_full_unstemmed | An Indoor Visible Light Positioning System Using Tilted LEDs with High Accuracy |
| title_short | An Indoor Visible Light Positioning System Using Tilted LEDs with High Accuracy |
| title_sort | indoor visible light positioning system using tilted leds with high accuracy |
| topic | localization visible light communication visible light positioning received signal strength linear least square polynomial regression |
| url | https://www.mdpi.com/1424-8220/21/3/920 |
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