LADAR sensor for a dense environment
US9575184B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2014 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Mar 10, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/931
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A multi-ladar sensor system is proposed for operating in dense environments where many ladar sensors are transmitting and receiving burst mode light in the same space, as may be typical of an automotive application. The system makes use of several techniques to reduce mutual interference between independently operating ladar sensors. In one embodiment, the individual ladar sensors are each assigned a wavelength of operation, and an optical receive filter for blocking the light transmitted at other wavelengths, an example of wavelength division multiplexing (WDM). Each ladar sensor, or platform, may also be assigned a pulse width selected from a list, and may use a pulse width discriminator circuit to separate pulses of interest from the clutter of other transmitters. Higher level coding, involving pulse sequences and code sequence correlation, may be implemented in a system of code division multiplexing, CDM. A digital processor optimized to execute mathematical operations is described which has a hardware implemented floating point divider, allowing for real time processing of received ladar pulses, and sequences of pulses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.