Phase noise compensation system, and method
US11635499B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2017 |
| Grant date | Apr 25, 2023 |
| Priority date | — |
| Expiry date | Aug 23, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2013/0236
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system for compensating for phase noise, with particular application in lidar, includes a compensation interferometer that receives a signal from a source, and splits it into a first and second path, with a path length difference Δτ between them. Typically the path length is significantly less than that of the return distance to a target. The output of the compensation interferometer, which consists of phase noise generated in time Δτ is vectorially summed during a time similar to a signal flight time to a target, and the result used to reduce phase noise present on measurements of a target. It further includes means for selecting Δτ such that competing noise elements are reduced or optimised.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.