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US 2022/0187418 A1Published application
Robust reflection point detection
AssigneeGM Global Technology Operations LLC
InventorsOded Bialer, Amnon Jonas
Life of this patent
Estimating the term…
Abstract
A radar system and method may be based on successively estimating reflection points from strongest to weakest, while adapting a detection threshold in each iteration according to the previous detections and the radar impulse.
Claims20
A radar system, comprising:
- a radar device comprising a sparse array receive element receiving a return radar signal;
- and
- a processing device:
- subjecting the return radar signal to a beamforming operation to produce a beamforming spectrum comprising superposed impulse responses comprising relative power and angle, each impulse response comprising a respective main lobe and respective side lobes;
- comparing the beamforming spectrum to a first power threshold and determining first tentative detection points as peak power points in the beamforming spectrum exceeding the first power threshold at respective angles;
- determining a first certain detection point as the one of the first tentative detection points having the greatest relative power;
- generating an updated power threshold comprising centering the impulse response related to the first certain detection point around the angle of the first certain detection point, multiplying the relative power of the first certain detection point by the impulse response related to the first certain detection point, and summing the product with the first power threshold;
- comparing the beamforming spectrum to the updated power threshold and determining second tentative detection points as peak power points of the beamforming spectrum exceeding the updated power threshold at respective angles;
- and
- determining a second certain detection point as the one of the second tentative detection points having the greatest relative power.
7 more elements
A radar system, comprising:
- a radar device comprising a sparse array receive element receiving a return radar signal;
- and
- a processing device configured to:
- subject the return radar signal to a beamforming operation to produce a beamforming spectrum comprising superposed impulse responses comprising relative power and angle, each impulse response comprising a respective main lobe and respective side lobes;
- and
- iteratively execute a detection routine comprising:
- performing a first stage detection comprising comparing the beamforming spectrum to an active power threshold and determining tentative detection points as peak power points in the beamforming spectrum exceeding the active power threshold at respective angles;
- performing a second stage detection comprising determining a certain detection point as the one of the tentative detection points having the greatest relative power;
- and
- updating the active power threshold for a subsequent iterative execution of the detection routine by centering the impulse response related to the certain detection point around the angle of the certain detection point, multiplying the relative power of the certain detection point by the impulse response related to the certain detection point, and summing the product with the active power threshold.
7 more elements
A method of object detection with a radar system, comprising:
- receiving a return radar signal with a radar device comprising a sparse array receive element;
- subjecting the return radar signal to a beamforming operation to produce a beamforming spectrum comprising superposed impulse responses comprising relative power and angle, each impulse response comprising a respective main lobe and respective side lobes;
- comparing the beamforming spectrum to a first power threshold and determining first tentative detection points as peak power points in the beamforming spectrum exceeding the first power threshold at respective angles;
- determining a first certain detection point as the one of the first tentative detection points having the greatest relative power;
- generating an updated power threshold comprising centering the impulse response related to the first certain detection point around the angle of the first certain detection point, multiplying the relative power of the first certain detection point by the impulse response related to the first certain detection point, and summing the product with the first power threshold;
- comparing the beamforming spectrum to the updated power threshold and determining second tentative detection points as peak power points of the beamforming spectrum exceeding the updated power threshold at respective angles;
- and
- determining a second certain detection point as the one of the second tentative detection points having the greatest relative power.
5 more elements
Dependencies are inferred from the claim text.