Doppler-based traffic radar system
US6417796B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2001 |
| Grant date | Jul 9, 2002 |
| Priority date | — |
| Expiry date | Apr 30, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/583
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A Doppler-based radar system and related method are provided for determining the direction and speed of at least one selected target traveling in the same lane as a moving patrol vehicle supporting the radar system independent of the direction of the target relative to the platform. The radar system includes an oscillator to generate a signal, an antenna to transmit the signal toward the at least one target and to receive a return signal reflected from the at least one target, a turnstile in communication with the antenna for receiving the return signal and forming processing signals which are different in phase, and circuitry for determining the direction of the at least one target relative to the platform. In particular, samples of the processing signals are transformed into the frequency domain and cross-correlated forming cross-correlation components. The radar system selects a target from the imaginary cross-correlation components dependent upon a mode of operation of the radar system and calculates the speed of the at least one target dependent upon a determined direction of the target and displays the speed for the operator's use. Advantageously, the radar system and method …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.