Title :
Cross range streaks in ISAR images generated via the shooting-and-bouncing ray technique: cause and solutions
Author :
Bhalla, Rajan ; Ling, Hao
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA
fDate :
4/1/1997 12:00:00 AM
Abstract :
The low-level “cross-range streaks,” observed in the ISAR images generated by the shooting-and-bouncing ray technique, are investigated. The streaks arise due to angular-scintillation noise in the Xpatch data, and such scintillation occurs due to the finite discretization of the ray-shooting grid. We propose two solutions to solve the streaking problem. The first solution uses spatial averaging to filter out the angular-scintillation noise. The second solution uses the multi-angle signature-extrapolation algorithm to generate the frequency-aspect scattered-field data. The performance and computational efficiency of these solutions are analyzed and presented
Keywords :
digital filters; inverse problems; noise; radar imaging; synthetic aperture radar; ISAR images; Xpatch data; angular-scintillation noise; computational efficiency; cross range streaks; filter; finite discretization; frequency-aspect scattered-field data; multi-angle signature-extrapolation algorithm; ray-shooting grid; shooting-and-bouncing ray technique; spatial averaging; Data processing; Dynamic range; Filters; Frequency; Image generation; Inverse synthetic aperture radar; Optical scattering; Radar imaging; Radar scattering; Synthetic aperture radar;
Journal_Title :
Antennas and Propagation Magazine, IEEE
