Method and apparatus for distance measuring equipment (DME/normal) using a smoothed concave polygonal pulse shape
US9664785B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 2014 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Apr 16, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/785
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring distance includes transmitting a first pair of RF pulses from an airborne interrogator, where the first pair of RF pulses are temporally separated from each other by a first time interval and each of the RF pulses in the first pair of RF pulses has a first pulse waveform. The method also includes receiving a second pair of RF pulses transmitted by a ground transponder. The RF pulses in the second pair of RF pulses have a second pulse waveform characterized by a smoothed concave polygonal function and/or a smoothed concave hexagonal function. The method further includes determining an elapsed time between transmitting the first pair of RF pulses and receiving the second pair of RF pulses and determining a distance between the airborne interrogator and the ground transponder based on at least the elapsed time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.