RFI suppression circuit and method
US5473332A · kind A · utility
25Cited by
11References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1994 |
| Grant date | Dec 5, 1995 |
| Priority date | — |
| Expiry date | Aug 10, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/2883
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Improvement of radar sign-to-noise ratio and detection sensitivity in radar systems is achieved by methods employing the subtraction of the unwanted radio frequency interference, RFI, or "clone" signals thereof, from the total received signal. The Clone signals are appropriately adjusted in phase and amplitude, and are obtained from an auxilliary broad beam antenna or from a delayed sample from the system's principal antenna. When multiple RFI signals at different frequencies are present, the entire receive band is subdivided into a plurality of frequency sub-ranges.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.