Method for improving SAR system sensitivity in the presence of RF interference
US5850202A · kind A · utility
7Cited by
13References
6Claims
0Family size
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Key dates
| Filing date | Jul 29, 1997 |
| Grant date | Dec 15, 1998 |
| Priority date | — |
| Expiry date | Jul 29, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/2927
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The sensitivity of a synthetic aperture radar (SAR) system employing stretch processing is improved in the presence of radio-frequency interference (RFI). The sequence of data processing operations initially uses a high number of bits to digitize radar echoes plus RFI, then uses floating-point arithmetic to perform range deskewing to "compress" RFI tones, followed by threshholding and nulling the primary RFI contributors, and finally re-quantizes the resulting radar signal to a lower number of bits and appropriately allocating these bits over the range of signal levels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.