Method for improving SAR system sensitivity in the presence of R

Communications: directive radio wave systems and devices (e.g. – Synthetic aperture radar

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342196, G01S 1390

Patent

active

058502025

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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