title: Focusing resonance signatures in ultra-wideband SAR images by allpass filtering.
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.
authors.forename: R
authors.initials: R
authors.lastname: Rau
authors.forename: J H
authors.initials: JH
authors.lastname: McClellan