Sub-aperture sidelobe and alias mitigation techniques

Details Sub-aperture sidelobe and alias mitigation techniques Sub-aperture sidelobe and alias mitigation techniques

2006-05-09

2006-05-09

Lobo, Ian J. (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Synthetic aperture radar

C342S02500R, C342S02500R, C342S02500R

Reexamination Certificate

active

07042386

ABSTRACT:
Methods for mitigating sidelobes and aliases, providing levels of suppression in excess of 20 dB. The methods may include 1) a version of the CLEAN algorithm developed in radio astronomy, modified to work on sub-aperture images; 2) weighting functions based on the phase and amplitude statistics of the sub-aperture image pixels to select points in the CLEAN algorithm; and 3) weighting functions based on the phase and amplitude statistics of the sub-aperture image pixels to mitigate sidelobes and aliases, in conjunction with CLEAN or separately. The methods may be used with all synthetic aperture techniques and are not limited to SAR.

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