Method and apparatus for detecting breathing radar targets
US12282082B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 10, 2022 |
| Grant date | Apr 22, 2025 |
| Priority date | — |
| Expiry date | Mar 6, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/524
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for radar signal processing separates an electric signal generated by Doppler processors of a radar into alternating current (AC) magnitudes with Doppler frequencies corresponding to absolute values between 0.1 and 4 Hz and direct current (DC) magnitudes with no Doppler frequency. An AC line and a DC line are generated, based on the AC magnitudes and the DC magnitudes, respectively, by adding respective energies across Doppler cells for each range cell and subsequently applying CFAR detector algorithm respectively. An energy level difference between an energy spike in the AC line and another energy spike in the DC line is calculated and compared with a threshold set for detecting a breathing target that is stationary. If the energy level difference is greater than the threshold, the breathing target that is stationary is detected and reported to the radar operator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.