Electromagnetic time-reversal positioning of a single user in a street canyon scenario

M. Javad Zakeri and Sajjad Sadeghi

Journal of Electromagnetic Waves and Applications, 2025, vol. 39, issue 13, 1600-1618

Abstract: We propose a low-complexity time-reversal (TR) positioning scheme that exploits multipath through spatio-temporal beamforming. Replacing the conventional free-space Green's function with a propagation Green's function - obtained from the spatial-spectrum expansion of a source embedded in a multilayered medium - captures wall effects and boosts positioning accuracy, resolution, and signal-to-clutter ratio without relying on GNSS. We validate the approach in a street-canyon measurement campaign, tracking a single user along both line-of-sight and non-line-of-sight paths. Data were collected with a switched-array MIMO channel sounder operating at 28 GHz, confirming the method's enhanced precision under realistic urban conditions.

Date: 2025
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DOI: 10.1080/09205071.2025.2524399

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