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Article

Synchronization-Free RadChat for Automotive Radar Interference Mitigation

1
Department of Electrical Engineering, Chalmers University of Technology, SE-41296 Gothenburg, Sweden
2
Veoneer Sweden AB, SE-41756 Gothenburg, Sweden
3
QamCom Research and Technology AB, SE-41285 Gothenburg, Sweden
*
Author to whom correspondence should be addressed.
This research was supported by Vinnova grant 2018-01929 and the Chalmers Transport Area of Advance project IRIS.
Academic Editors: Sandra Roger, Carmen Botella-Mascarell and David Martín-Sacristán
Sustainability 2021, 13(12), 6891; https://doi.org/10.3390/su13126891
Received: 27 April 2021 / Revised: 4 June 2021 / Accepted: 14 June 2021 / Published: 18 June 2021
(This article belongs to the Special Issue Vehicular Communications for Sustainable Mobility and Transportation)
Automotive radar interference mitigation is expected to be inherent in all future ADAS and AD vehicles. Joint radar communications is a candidate technology for removing this interference by coordinating radar sensing through communication. Coordination of radars requires strict time synchronization among vehicles, and our formerly proposed protocol (RadChat) achieves this by a precise absolute time, provided by GPS clocks of vehicles. However, interference might appear if synchronization among vehicles is lost in case GPS is spoofed, satellites are blocked over short intervals, or GPS is restarted/updated. Here we present a synchronization-free version of RadChat (Sync-free RadChat), which relies on using the relative time for radar coordination, eliminating the dependency on the absolute time provided by GPS. Simulation results obtained for various use cases show that Sync-free RadChat is able to mitigate interference without degrading the radar performance. View Full-Text
Keywords: radar communication; FMCW radar; radar interference; synchronization; vehicular network; VANET; radar communication coexistence; radar communication convergence radar communication; FMCW radar; radar interference; synchronization; vehicular network; VANET; radar communication coexistence; radar communication convergence
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MDPI and ACS Style

Aydogdu, C.; Wymeersch, H.; Eriksson, O.; Herbertsson, H.; Rydström, M. Synchronization-Free RadChat for Automotive Radar Interference Mitigation. Sustainability 2021, 13, 6891. https://doi.org/10.3390/su13126891

AMA Style

Aydogdu C, Wymeersch H, Eriksson O, Herbertsson H, Rydström M. Synchronization-Free RadChat for Automotive Radar Interference Mitigation. Sustainability. 2021; 13(12):6891. https://doi.org/10.3390/su13126891

Chicago/Turabian Style

Aydogdu, Canan, Henk Wymeersch, Olof Eriksson, Hans Herbertsson, and Mats Rydström. 2021. "Synchronization-Free RadChat for Automotive Radar Interference Mitigation" Sustainability 13, no. 12: 6891. https://doi.org/10.3390/su13126891

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