Title :
Focusing resonance signatures in ultra-wideband SAR images by allpass filtering
Author :
Rau, Richard ; McClellan, James H.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
fDate :
9/1/2000 12:00:00 AM
Abstract :
This correspondence shows that resonance signatures in ultra-wideband synthetic aperture radar (SAR) images, which are smeared out due to their late arrival time, can be focused and extracted by postfiltering the SAR images with special two-dimensional (2-D) allpass filters. A design algorithm for FIR approximations to the desired allpass filters based on radial slice approximations (RSA) is presented
Keywords :
FIR filters; all-pass filters; radar imaging; synthetic aperture radar; 2D allpass filters; FIR approximations; SAR images; allpass filtering; design algorithm; postfiltering; radial slice approximations; resonance signatures focusing; two-dimensional allpass filters; ultra-wideband synthetic aperture radar; Filtering; Finite impulse response filter; Focusing; Radar antennas; Radar imaging; Reflectivity; Resonance; Synthetic aperture radar; Two dimensional displays; Ultra wideband technology;
Journal_Title :
Image Processing, IEEE Transactions on
