Method and device for frequency-modulated continuous-wave radar detection with removal of ambiguity between distance and speed
US5963163A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1998 |
| Grant date | Oct 5, 1999 |
| Priority date | — |
| Expiry date | Feb 25, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S2013/9321
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a method and device for frequency-modulated continuous-wave radar detection with removal of ambiguity between the distance and the speed, the radar sends out at least alternately two parallel and discontinuous frequency modulation ramps that are slightly offset by a frequency variation (.DELTA.F), the frequency switching from one ramp to the other at the end of a given duration (Tf), the distance from a detected target being estimated as a function of the difference in phase (.DELTA..phi.) between a received signal (S.sub.1 (t)) corresponding to the first ramp and a received signal (S.sub.2 (t)) corresponding to the second ramp, the speed of the target being obtained from the estimated distance and the ambiguity straight line associated with the target. The disclosed method and device can be applied especially to radars for automobiles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.