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公开(公告)号：US11630183B2
公开(公告)日：2023-04-18
申请号：US17216749
申请日：2021-03-30
Applicant: Axis AB
Inventor： Adham Sakhnini , Andreas Glatz , Axel Landgren , Mattias Simonsson , Anders Skoog , Anders Mannesson , Sebastian Heunisch , Stefan Adalbjörnsson , Karl Nordin
Abstract: A method for interference reduction between radar units. The method is performed by a radar unit and comprises: receiving one or more radar frames, wherein the one or more radar frames correspond to one or more respective time intervals during which the radar unit was activated to transmit and receive signals to produce data samples of the one or more radar frames; and determining whether the one or more radar frames have a higher presence of data samples that are subject to interference from other radar units in a first half of their corresponding time intervals than in a second, later, half of their corresponding time intervals. In case the presence is higher in the first half of their corresponding time intervals, a scheduled time interval of an upcoming radar frame to be produced by the radar unit is postponed, and otherwise it is advanced.
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公开(公告)号：US20240134031A1
公开(公告)日：2024-04-25
申请号：US18483122
申请日：2023-10-08
Applicant: Axis AB
Inventor： Anders Mannesson , Mattias Simonsson , Santhosh Nadig , Johan E. Åkesson , Sebastian Heunisch , Anders Skoog
IPC: G01S13/538
CPC classification number: G01S13/538
Abstract: A system adaptively filters out a representation of an object from a radar frame captured by a radar device, where a maximum signal strength at zero velocity is obtained in a range bin comprising a detection of the object in range Doppler representations of a set of radar frames captured during a time period before the radar frame. A motion vector is obtained representing a determined magnitude and direction of motion of the radar device at the time when the radar frame was captured. The motion of the radar device is due to an oscillatory movement of the radar device. A range Doppler representation of the radar frame is produced and a direction vector representing a direction from the radar device to the object is determined. A radial relative velocity between the object and the radar device is determined based on the obtained motion vector and the determined direction vector.
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公开(公告)号：US12276722B2
公开(公告)日：2025-04-15
申请号：US17748223
申请日：2022-05-19
Applicant: Axis AB
Inventor： Anders Mannesson , André Nüsslein , Anton Sedin , Aras Papadelis , Daniel Ståhl , David Wadmark , Sebastian Heunisch , Stefan Adalbjörnsson
Abstract: A method for classifying tracks in radar detections of a scene acquired by a stationary radar unit, comprises: acquiring radar detections of the scene using the static radar unit; feeding at least a portion of the radar detections into a tracker module for producing track-specific feature data indicating a specific track in the scene, feeding at least a portion of the radar detections into a scene model comprising information about scene-specific features aggregated over time, and information indicating areas in the scene with expected ghost target detections and areas with expected real target detections, wherein at least a subset of the scene-specific features is determined from the radar detections; classifying the specific track as belonging to a real target or to a ghost target by relating the specific track to a position in the scene model.
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公开(公告)号：US20240230878A9
公开(公告)日：2024-07-11
申请号：US18483122
申请日：2023-10-09
Applicant: Axis AB
Inventor： Anders Mannesson , Mattias Simonsson , Santhosh Nadig , Johan E. Åkesson , Sebastian Heunisch , Anders Skoog
IPC: G01S13/538
CPC classification number: G01S13/538
Abstract: A system adaptively filters out a representation of an object from a radar frame captured by a radar device, where a maximum signal strength at zero velocity is obtained in a range bin comprising a detection of the object in range Doppler representations of a set of radar frames captured during a time period before the radar frame. A motion vector is obtained representing a determined magnitude and direction of motion of the radar device at the time when the radar frame was captured. The motion of the radar device is due to an oscillatory movement of the radar device. A range Doppler representation of the radar frame is produced and a direction vector representing a direction from the radar device to the object is determined. A radial relative velocity between the object and the radar device is determined based on the obtained motion vector and the determined direction vector.
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