| 1. |
- Aydogdu, Canan, 1978, et al.
(författare)
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Radar Interference Mitigation for Automated Driving : Exploring Proactive Strategies
- 2020
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Ingår i: IEEE signal processing magazine (Print). - Piscataway : Institute of Electrical and Electronics Engineers (IEEE). - 1053-5888 .- 1558-0792. ; 37:4, s. 72-84
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Tidskriftsartikel (refereegranskat)abstract
- Autonomous driving relies on a variety of sensors, especially radars, which have unique robustness under heavy rain/fog/snow and poor light conditions. With the rapid increase of the amount of radars used on modern vehicles, where most radars operate in the same frequency band, the risk of radar interference becomes a compelling issue. This article analyzes automotive radar interference and proposes several new approaches that combine industrial and academic expertise toward the goal of achieving interference-free autonomous driving (AD). © IEEE.
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| 2. |
- Aydogdu, Canan, 1978, et al.
(författare)
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Radar Interference Mitigation through Active Coordination
- 2021
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Ingår i: IEEE National Radar Conference - Proceedings. - : IEEE. - 1097-5659. ; 2021-May, s. 1-6
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Konferensbidrag (refereegranskat)abstract
- Intelligent transportation is heavily reliant on radar, which have unique robustness under heavy rain/fog/snow and poor light conditions. With the rapid increase of the number of radars used on modern vehicles, most operating in the same frequency band, the risk of radar interference becomes an important issue. As in radio communication, interference can be mitigated through coordination. We present and evaluate two approaches for radar interference coordination, one for FMCW and one for OFDM, and highlight their challenges and opportunities.
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| 3. |
- Aydogdu, Canan, 1978, et al.
(författare)
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Synchronization-free radchat for automotive radar interference mitigation
- 2021
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Ingår i: Sustainability. - : MDPI AG. - 2071-1050. ; 13:12
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Tidskriftsartikel (refereegranskat)abstract
- 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.
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| 4. |
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| 5. |
- Carvajal, Gisela, 1983, et al.
(författare)
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Comparison of Automotive FMCW and OFDM Radar Under Interference
- 2020
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Ingår i: IEEE National Radar Conference - Proceedings. - New York, NY : IEEE. - 1097-5659. ; 2020-September
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Konferensbidrag (refereegranskat)abstract
- Automotive radars are subject to interference in spectrally congested environments. To mitigate this interference, various waveforms have been proposed. We compare two waveforms (FMCW and OFDM) in terms of their radar performance and robustness to interference, under similar parameter settings. Our results indicate that under proper windowing both waveforms can achieve similar performance, but OFDM is more sensitive to interference.
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| 6. |
- Aydogdu, Canan, 1978, et al.
(författare)
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A Solution for Removing Automotive Radar Interference: Radar Communications
- 2018
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Ingår i: Swedish Transportation Research Conference.
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Konferensbidrag (refereegranskat)abstract
- Automotive radar is becoming an indispensable equipment in modern cars, for different functions including lane keeping, speed control and parking, especially due to its immunity to bad weather conditions [1]. Likewise, vehicle-to-vehicle (V2V) communication is on the way to become a standard, having proven its value in dissemination of safety critical information [2]. However, the widespread use of both technologies lead to problems, cutting short future plans for autonomous driving and safety. Increased penetration rate and density of automotive radars lead to increased mutual interference, which in turn result with reduced detection probability and ghost detections [3]. Similarly, Omni-directional V2V communication transmissions result in high interference with an increased number of vehicles [4]. This interference leads to packet losses, especially in emergency situations when many vehicles emit warning messages, in turn affecting system-wide safety.
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| 7. |
- Aydogdu, Canan, 1978, et al.
(författare)
-
Automotive Radar Interference Mitigation via Multi-Hop Cooperative Radar Communications
- 2021
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Ingår i: EuRAD 2020 - 2020 17th European Radar Conference. ; , s. 270-273
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Konferensbidrag (refereegranskat)abstract
- We investigate the interference mitigation performance of cooperative radar communications in dynamic multi-hop vehicular ad-hoc networks, where each automotive radar is not in the field of view of others. This study builds on top of our former proposed cooperative radar communications solution, RadChat, which uses a single hardware for both radar and communication purposes. Simulation results obtained for high-way traffic scenarios show that RadChat functions with quite a low latency while decreasing the interference significantly.
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| 8. |
- Aydogdu, Canan, 1978, et al.
(författare)
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Can Automotive Radars Form Vehicular Networks?
- 2020
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Ingår i: IEEE National Radar Conference - Proceedings. - 1097-5659. - 9781728189420 ; 2020-September, s. 1-6
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Konferensbidrag (refereegranskat)abstract
- Radar communications (RadCom) is a spectrally efficient way for removing automotive radar interference and thereby enhancing reliable radar sensing, via a single hardware for both radar and communications. When interference coordination does not use all the RadCom resources, opportunities for communicating additional data arise. We propose a new communication protocol, termed RadNet (for radar network), which forms a vehicular ad-hoc multi-hop network by automotive radars in a distributed manner. Simulation results obtained for high-way use cases show that RadNet can enable several Mbps data links without degrading the radar performance.
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| 9. |
- Aydogdu, Canan, 1978, et al.
(författare)
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Distributed Radar-aided Vehicle-to-Vehicle Communication
- 2020
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Ingår i: IEEE National Radar Conference - Proceedings. - 1097-5659. ; 2020-September
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Konferensbidrag (refereegranskat)abstract
- Establishing high-rate vehicle-to-vehicle (V2V) linkswith narrow beamwidth is challenging due to the varying networktopology. A too narrow beam may miss the intended receiver,while a too broad beam leads to SNR loss. We propose toharness the high accuracy of radar detections to establish V2V links. In particular, we develop a distributed method where eachvehicle associates local radar detections with GPS informationcommunicated by nearby vehicles. The method relies on thetransformation of relative to global coordinates, the definition ofa suitable metric, and solving an optimal assignment problem. Wedemonstrate that the proposed approach avoids time-consumingchannel estimation and provides high SNR, under the conditionthat reliable relative and absolute location information is present.
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| 10. |
- Aydogdu, Canan, 1978, et al.
(författare)
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Improved Pedestrian Detection under Mutual Interference by FMCW Radar Communications
- 2018
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Ingår i: IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC. - 9781538660096 ; 2018-September, s. 101-105
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Konferensbidrag (refereegranskat)abstract
- The widespread of automotive radars leads to increase of mutual interference, which in turn degrades road safety. The effect of mutual interference with a focus on detection of pedestrians is investigated. It is shown that detection of pedestrians degrades in the presence of mutual interference. A joint radar communication solution is proposed that increases pedestrian detection probability with negligible impact in the ranging error.
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