Distance and position estimation in visible light systems with RGB LEDs

Date
2022-01-17
Advisor
Supervisor
Co-Advisor
Co-Supervisor
Instructor
Source Title
Digital Signal Processing
Print ISSN
1051-2004
Electronic ISSN
1095-4333
Publisher
Elsevier
Volume
123
Issue
Pages
1 - 14
Language
English
Type
Article
Journal Title
Journal ISSN
Volume Title
Series
Abstract

In this paper, distance and position estimation problems are investigated for visible light positioning (VLP) systems with red-green-blue (RGB) light emitting diodes (LEDs). The accuracy limits on distance and position estimation are calculated in terms of the Cramér-Rao lower bound (CRLB) for three different scenarios. Scenario 1 and Scenario 2 correspond to synchronous and asynchronous systems, respectively, with known channel attenuation formulas at the receiver. In Scenario 3, a synchronous system is considered but channel attenuation formulas are not known at the receiver. The derived CRLB expressions reveal the relations among distance/position estimation accuracies in the considered scenarios and lead to intuitive explanations for the benefits of using RGB LEDs. In addition, maximum likelihood (ML) estimators are derived in all scenarios, and it is shown that they can achieve close performance to the CRLBs in some cases for sufficiently high source optical powers. © 2022 Elsevier Inc.

Course
Other identifiers
Book Title
Keywords
Cramér-Rao lower bound, LED, Maximum likelihood estimation, Positioning, RGB, Visible light
Citation
Published Version (Please cite this version)