|
For Full-Text PDF, please login, if you are a member of IEICE,
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
|
Accurate Three-Dimensional Scattering Center Extraction for ISAR Image Using the Matched Filter-Based CLEAN Algorithm
Dal-Jae YUN Jae-In LEE Ky-Ung BAE Won-Young SONG Noh-Hoon MYUNG
Publication
IEICE TRANSACTIONS on Communications
Vol.E101-B
No.2
pp.418-425 Publication Date: 2018/02/01 Publicized: 2017/08/22 Online ISSN: 1745-1345
DOI: 10.1587/transcom.2017ISP0005 Type of Manuscript: Special Section PAPER (Special Section on Recent Progress in Antennas and Propagation in Conjunction with Main Topics of ISAP2016) Category: Electromagnetic Analysis Keyword: scattering center extraction, inverse synthetic aperture radar (ISAR) imaging, CLEAN algorithm, matched filter, point spread function,
Full Text: PDF>>
Summary:
Three-dimensional (3-D) scattering center models use a finite number of point scatterers to efficiently represent complex radar target signature. Using the CLEAN algorithm, 3-D scattering center model is extracted from the inverse synthetic aperture radar (ISAR) image, which is generated based on the shooting and bouncing ray (SBR) technique. The conventional CLEAN extracts the strongest peak iteratively based on the assumption that the scattering centers are isolated. In a realistic target, however, both interference from the closely spaced points and additive noise distort the extraction process. This paper proposes a matched filter-based CLEAN algorithm to improve accuracy efficiently. Using the matched filtering of which impulse response is the known point spread function (PSF), a point most correlated with the PSF is extracted. Thus, the proposed method optimally enhances the accuracy in the presence of massive distortions. Numerical simulations using canonical and realistic targets demonstrate that the extraction accuracy is improved without loss of time-efficiency compared with the existing CLEAN algorithms.
|
|
|