Title: Resolving positions of coherent sources using linear antenna arrays at 2.4 GHz
Authors: Van Nieuwenhuyse, Anneleen
Wielandt, Stijn
Goemaere, Jean Pierre
Nauwelaers, Bart
De Strycker, Lieven
Issue Date: 20-Nov-2014
Publisher: IEEE
Host Document: Ubiquitous Positioning Indoor Navigation and Location Based Service (UPINLBS), 2014 pages:141-147
Conference: UPINLBS edition:3 location:Corpus Christi, TX, USA date:20-21 November 2014
Abstract: In this paper we intend to find out what resolution can be achieved with two-dimensional Angle of Arrival localization when using linear antenna arrays at 2.4 GHz. A theoretical resolution calculation method is presented. Room dimensions, number of cooperating anchor nodes (provided with a linear antenna array) which track the position of a mobile node and number of antenna elements can be chosen. These theoretical calculations lead to the definition of a reference value which can be used to calculate the expected resolution for all rectangular shaped rooms with the desired variable settings. It is also shown that square rooms result in the best resolution and adding extra antenna elements improves the resolution. The design and calibration of a practical linear antenna array, with four linearly positioned 2.4 GHz antenna elements and inter distance of λ/2, is presented. Measurements of practical beam patterns, and the corresponding −3dB beam widths, for different incident angles show that influences such as mutual coupling and reflections can not be neglected. The practical resolutions are compared with expected theoretical values and it is shown that besides I/Q and phase offset calibration, manifold calibration is necessary.
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Electrical Engineering (ESAT) TC, Technology Campuses Ghent and Aalst
Technologiecluster ESAT Elektrotechnische Engineering
ESAT- TELEMIC, Telecommunications and Microwaves

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