Bearing Estimation for Indoor Localization Systems Using Planar Circular Photodiode Arrays

An inexpensive bearing estimation sensor and a corresponding method has been recently proposed for indoor localization applications. The system utilizes modulated infrared LED sources as light beacons, and a planar circular photodiode array (PCPA) as sensor. The PCPA measures the light intensity of...

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Vydáno v:Applied sciences Ročník 10; číslo 11; s. 3683
Hlavní autoři: Zachár, Gergely, Vakulya, Gergely, Simon, Gyula
Médium: Journal Article
Jazyk:angličtina
Vydáno: MDPI AG 01.06.2020
Témata:
Analysis
azimuth estimation
bearing estimation
Home
Methods
Orientation
Orientation (Psychology)
photodiode array
position estimation
signal processing
Technology application
Triangulation
Hungary
ISSN:2076-3417, 2076-3417
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Popis
Shrnutí:An inexpensive bearing estimation sensor and a corresponding method has been recently proposed for indoor localization applications. The system utilizes modulated infrared LED sources as light beacons, and a planar circular photodiode array (PCPA) as sensor. The PCPA measures the light intensity of the beacons in multiple channels, from which the bearings of the beacons can be estimated using least squares (LS) method, with an accuracy in the range of 1 degree. In this paper a novel estimation method is proposed, which provides fast bearing estimates from the PCPA measurements using the frequency domain. The computational complexity of the novel method is orders of magnitude less than that of the LS solution, at the price of a slight decrease in accuracy. The performance of the PCPA is analyzed in the presence of reflections and the tilting of the sensor. The results demonstrate that the effect of reflections can be significant, while the tilting of the sensor has only a minor effect on the bearing estimation. The applicability of the measurement device in indoor localization applications is illustrated by real localization examples.
ISSN:2076-3417
2076-3417
DOI:10.3390/app10113683