Apodized RFI filtering of synthetic aperture radar images

Technical Report · Sat Feb 01 00:00:00 EST 2014

DOI:https://doi.org/10.2172/1204095· OSTI ID:1204095

Doerry, Armin Walter ^[1]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Fine resolution Synthetic Aperture Radar (SAR) systems necessarily require wide bandwidths that often overlap spectrum utilized by other wireless services. These other emitters pose a source of Radio Frequency Interference (RFI) to the SAR echo signals that degrades SAR image quality. Filtering, or excising, the offending spectral contaminants will mitigate the interference, but at a cost of often degrading the SAR image in other ways, notably by raising offensive sidelobe levels. This report proposes borrowing an idea from nonlinear sidelobe apodization techniques to suppress interference without the attendant increase in sidelobe levels. The simple post-processing technique is termed Apodized RFI Filtering (ARF).

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1204095
• Report Number(s): SAND2014-1376; 503904
• Country of Publication: United States
• Language: English