论文信息 - Focusing resonance signatures in ultra-wideband SAR

Focusing resonance signatures in ultra-wideband SAR

Low-frequency ultra-wideband (UWB) synthetic aperture radars (SAR) provide new capabilities for target detection and classification. Resonance signatures of targets are among the most useful features for target discrimination. However, these resonance returns are normally smeared out in focused SAR images due to their late arrival time. This paper shows that these resonance signatures can be focused by postfiltering the SAR image with a special class of all-pass filters. FIR approximations to these all-pass filters can be designed with a modified radial slice approximation algorithm. We demonstrate the performance of the designed filters on synthetic data.

J.H. McClellan | R. Rau

[1] Mehrdad Soumekh,et al. Reconnaissance with ultra wideband UHF synthetic aperture radar , 1995, IEEE Signal Process. Mag..

[2] Lam H. Nguyen,et al. Detection algorithms for ultrawideband foliage-penetration radar , 1997, Defense, Security, and Sensing.

[3] A. W. Rihaczek,et al. Man-made target backscattering behavior: applicability of conventional radar resolution theory , 1996, IEEE Transactions on Aerospace and Electronic Systems.

[4] J. W. McCorkle,et al. Focusing of synthetic aperture ultra wideband data , 1991, IEEE 1991 International Conference on Systems Engineering.

[5] N. Nandhakumar,et al. Features for detecting obscured objects in ultra-wideband (UWB) SAR imagery using a phenomenological approach , 1996, Pattern Recognit..

[6] James H. McClellan,et al. ASPECT ANGLE INFORMATION OF TARGETS IN UWB SAR IMAGES AND NEW POST PROCESSING TECHNIQUES Richard Rau James H. McClellan , 1998 .

[7] James H. McClellan,et al. Design of polar-separable FIR filters by radial slice approximations , 1997, 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing.