Frequency domain automatic gain control for a frequency modulated continuous wave (FMCW) light detection and ranging (LIDAR) system
US12013497B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 12, 2023 |
| Grant date | Jun 18, 2024 |
| Priority date | — |
| Expiry date | Jan 12, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3084
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light detection and ranging (LIDAR) system includes an automatic gain control (AGC) unit to reduce the dynamic range, reducing processing power and saving circuit area and cost. The system detects a return beam of a light signal transmitted to a target, having a first dynamic range in a time domain. 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. The AGC unit can measure a power of the return beam, and apply variable gain in the frequency domain to reduce a dynamic range of the return beam to a second dynamic range lower than the first dynamic range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.