NDLI: A fast algorithm for signature prediction and image formation using the shooting and bouncing ray technique

Content Provider	IEEE Xplore Digital Library
Author	Bhalla, R. Hao Ling
Copyright Year	1994
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Texas Univ., Austin, TX, USA (Bhalla, R.; Hao Ling)
Abstract	In radar signature applications it is often desirable to generate the range profiles and inverse synthetic aperture radar (ISAR) images of a target. The simulation of synthetic range profiles and ISAR images is usually a time intensive task and computation time is of prime importance. We present a fast algorithm to generate range profiles and ISAR images using the shooting and bouncing ray (SBR) technique. A closed form time-domain ray-spread function was derived by Jeng, Bhalla, Lee, Ling and Andersh (see IEEE Trans. Antennas Propagat., Sept. 1993) for the direct computation of the time-domain response (or range profile) of a conducting target without resorting to multi-frequency calculations. This formula gives the explicit contribution of each exit ray in the time domain. We have also extended this formula to the two-dimensional ISAR plane under the small-angle approximation. We cast these previously derived formulas into a convolution form. The convolution consists of a non-uniformly sampled signal and a closed form time-domain or image-domain ray-spread function. Using a fast scheme proposed by Sullivan (1990), the non-uniformly sampled function is first interpolated onto a uniform grid before the convolution is performed by the fast Fourier transform (FFT) algorithm. Results for several complex targets are presented to demonstrate the computation time savings and fidelity of the scheme.
Starting Page	1990
Ending Page	1993
File Size	180013
Page Count	4
File Format	PDF
ISBN	0780320093
DOI	10.1109/APS.1994.408097
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1994-06-20
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Prediction algorithms Time domain analysis Convolution Radar applications Radar imaging Synthetic aperture radar Inverse synthetic aperture radar Computational modeling Antennas and propagation Fast Fourier transforms
Content Type	Text
Resource Type	Article

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