Multi-level digital modulation for time of flight method and system
US9341715B2 · kind B2 · utility
11Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2011 |
| Grant date | May 17, 2016 |
| Priority date | — |
| Expiry date | Feb 16, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/894
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The modulation scheme disclosed in this invention report allows for utilizing multiple 3D time-of-flight cameras at the same time by exploiting the inherent pseudo noise properties of the optical modulation signals. Compared to recent systems based on pure pseudo noise modulation signals, the stochastic measurement error in a single-camera environment is significantly reduced. The basic concept relies on the generation of a three level optical modulation signal that includes two pseudo noise sequences.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.