Techniques for time domain automatic gain control for a frequency modulated continuous wave (FMCW) light detection and ranging (LIDAR) system
US11994626B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 2022 |
| Grant date | May 28, 2024 |
| Priority date | — |
| Expiry date | Oct 10, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3084
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A frequency modulated continuous wave (FMCW) light detection and ranging (LIDAR) system includes an automatic gain control (AGC) unit to reduce the dynamic range of the signal to be processed. The system detects a return beam of a light signal transmitted to a target, having a first dynamic range in a time domain. The AGC unit can measure a power of the return beam, and apply variable gain in the time domain to reduce a dynamic range of the return beam to a lower dynamic. An analog to digital converter (ADC) generates a digital signal based on the return beam. A processor can perform time domain processing on the digital signal, convert the digital signal from the time domain to a frequency domain, and perform frequency domain processing on the digital signal in the frequency domain.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.