Radar apparatus for detecting and/or classifying an agitated reflective target
US4490718A · kind A · utility
14Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1975 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Nov 6, 1995 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S13/536
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Improved non-cooperative radar apparatus locates and type-classifies an agitated, vibrating reflective target (e.g., a vehicle with its engine running)--whether the target is moving or stationary. A homodyne-type receiver with a cooperating band pass filter extracts a reflected, frequency-shifted energy pattern which identifies the incidence of the agitated target. In accordance with further aspects of the instant invention, the particular energy distribution for the returned, reflected wave is then compared with a stored ensemble of such distributions, or target "signatures", to type-catagorize the target.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.