Techniques for processing amplitude modulation (AM) and frequency modulation (FM) in separate paths for simultaneous determination of range and velocity in an FMCW LIDAR system
US11994594B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2022 |
| Grant date | May 28, 2024 |
| Priority date | — |
| Expiry date | Nov 1, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D1/249
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light detection and ranging (LIDAR) system has a modulator to modulate a light signal from an optical source with a low-power mode at a section of a sweep signal to generate a pulsed light signal transmitted towards a target. The LIDAR system has a photodetector to receive a return beam from the target with an amplitude modulated (AM) signal portion and a frequency modulated (FM) signal portion. The LIDAR system processes the return beam with in-phase/quadrature (I/Q) detection to extract the AM signal portion and the FM signal portion. The system determines a range value and a velocity value for the target based on the extracted AM signal portion and the extracted FM signal portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.