Liveliness detection using radar
US11391836B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 10, 2019 |
| Grant date | Jul 19, 2022 |
| Priority date | — |
| Expiry date | Jan 10, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/336
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed are techniques for liveliness detection. In an aspect, a radar sensor of an electronic device transmits a radar frame comprising a plurality of bursts, each burst comprising a plurality of radar pulses, and receives a plurality of reflected radar pulses. The electronic device generates a radar image representing azimuth, elevation, range, and slow time measurements for the radar frame based on the plurality of reflected pulses, applies a Doppler FFT to the radar image to convert the radar image to represent azimuth, elevation, range, and velocity measurements for the radar frame, identifies at least one area of motion in the radar image based on velocity bins of the radar image, and detects a target dynamic object based on a CFAR detection applied over the range and azimuth measurements and a SNR threshold of the received plurality of reflected pulses associated with the at least one area of motion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.