Angle of Arrival and Centimeter Distance Estimation on a Smart UWB Sensor Node
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Date
2023
Publication Type
Journal Article
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Abstract
Accurate and low-power indoor localization is becoming more and more of a necessity to empower novel consumer and industrial applications. In this field, the most promising technology is based on UWB modulation; however, current UWB positioning systems do not reach centimeter accuracy in general deployments due to multipath and nonisotropic antennas, still necessitating several fixed anchors to estimate an object's position in space. This article presents an in-depth study and assessment of angle of arrival (AoA) UWB measurements using a compact, low-power solution integrating a novel commercial module with phase difference of arrival (PDoA) estimation as integrated feature. Results demonstrate the possibility of reaching centimeter distance precision and ang 2.4 degrees average angular accuracy in many operative conditions, e.g., in a ang 90 degrees range around the center. Moreover, integrating the channel impulse response, the phase differential of arrival, and the point-to-point distance, an error correction model is discussed to compensate for reflections, multipaths, and front-back ambiguity.
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published
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Journal / series
Volume
72
Pages / Article No.
9508110
Publisher
IEEE
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Subject
Angle of arrival (AoA); Internet of Things (IoT); localization; machine learning; neural network; phase difference of arrival (PDoA); ultra-wideband (UWB)
Organisational unit
01225 - D-ITET Zentr. f. projektbasiertes Lernen / D-ITET Center for Project-Based Learning