Method for improving SAR system sensitivity in the presence of RF interference
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United States of America Patent
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Dec 15, 1998
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N/A
app pub date -
Jul 29, 1997
filing date -
Jul 29, 1997
priority date (Note) -
Expired
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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.
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