Two-dimensional ISAR model and image reconstruction with stepped frequency-modulated signal

Karakasiliotis, AV; Lazarov, AD; Frangos, PV; Boultadakis, G; Kalognomos, G

dc.contributor.author	Karakasiliotis, AV	en
dc.contributor.author	Lazarov, AD	en
dc.contributor.author	Frangos, PV	en
dc.contributor.author	Boultadakis, G	en
dc.contributor.author	Kalognomos, G	en
dc.date.accessioned	2014-03-01T01:29:25Z
dc.date.available	2014-03-01T01:29:25Z
dc.date.issued	2008	en
dc.identifier.issn	1751-9675	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19256
dc.subject	Frequency Modulated	en
dc.subject	Image Reconstruction	en
dc.subject.classification	Engineering, Electrical & Electronic	en
dc.subject.other	Computer simulation	en
dc.subject.other	Data compression	en
dc.subject.other	Equations of motion	en
dc.subject.other	Fourier transforms	en
dc.subject.other	Frequency modulation	en
dc.subject.other	Image enhancement	en
dc.subject.other	Image processing	en
dc.subject.other	Image reconstruction	en
dc.subject.other	Image resolution	en
dc.subject.other	Imaging systems	en
dc.subject.other	Imaging techniques	en
dc.subject.other	Inverse problems	en
dc.subject.other	Mathematical transformations	en
dc.subject.other	Modulation	en
dc.subject.other	Photoacoustic effect	en
dc.subject.other	Radar	en
dc.subject.other	Repair	en
dc.subject.other	Restoration	en
dc.subject.other	Synthetic aperture radar	en
dc.subject.other	Synthetic apertures	en
dc.subject.other	Targets	en
dc.subject.other	Two dimensional	en
dc.subject.other	Azimuth compression	en
dc.subject.other	Coherent summation	en
dc.subject.other	Constant speed	en
dc.subject.other	Cross correlations	en
dc.subject.other	Fourier	en
dc.subject.other	High resolutions	en
dc.subject.other	Image reconstruction algorithms	en
dc.subject.other	Imaging algorithms	en
dc.subject.other	Inverse Synthetic Aperture Radar (ISAR)	en
dc.subject.other	ISAR imaging	en
dc.subject.other	Linear frequency modulation	en
dc.subject.other	Mathematical expressions	en
dc.subject.other	Modulated signals	en
dc.subject.other	Numerical simulations	en
dc.subject.other	Point scatterers	en
dc.subject.other	Range compression	en
dc.subject.other	Rectangular grids	en
dc.subject.other	Return signals	en
dc.subject.other	Rotational motions	en
dc.subject.other	Simulation results	en
dc.subject.other	Stepped frequencies	en
dc.subject.other	Translational motions	en
dc.subject.other	Waveforms	en
dc.subject.other	Inverse synthetic aperture radar	en
dc.title	Two-dimensional ISAR model and image reconstruction with stepped frequency-modulated signal	en
heal.type	journalArticle	en
heal.identifier.primary	10.1049/iet-spr:20070115	en
heal.identifier.secondary	http://dx.doi.org/10.1049/iet-spr:20070115	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	A two-dimensional (2-D) inverse synthetic aperture radar (ISAR) return signal model that employs stepped frequency (SF) modulation is developed. The geometry of the examined ISAR scenario is described by analytical geometrical equations. The target to be imaged is represented by a rectangular grid of point scatterers, moving along a rectilinear trajectory at constant speed, without any rotational motion. Thus, the inverse synthetic aperture results from the translational motion of the target for a short period of time. The process of ISAR signal modelling through coherent summation of the SF-modulated signals reflected from different point scatterers of the target is thoroughly described. Moreover, an efficient ISAR image reconstruction approach, including cross-correlation-based range compression and fast-Fourier-transform-based azimuth compression, is presented through analytical mathematical expressions. Numerical simulations are carried out for various SF ISAR scenarios and high-resolution ISAR images are obtained by applying the proposed ISAR image reconstruction approach. Simulation results (ISAR images and corresponding entropy values) indicate the validity of the proposed 2-D SF ISAR return signal model and the efficiency of the proposed imaging algorithms. Finally, a numerical simulation result is illustrated, which shows the comparison of the performance of the proposed ISAR image reconstruction algorithms based on SF and linear frequency modulation waveforms. It is shown that the two waveforms attain almost the same ISAR image resolution. © 2008 The Institution of Engineering and Technology.	en
heal.publisher	INST ENGINEERING TECHNOLOGY-IET	en
heal.journalName	IET Signal Processing	en
dc.identifier.doi	10.1049/iet-spr:20070115	en
dc.identifier.isi	ISI:000260775300009	en
dc.identifier.volume	2	en
dc.identifier.issue	3	en
dc.identifier.spage	277	en
dc.identifier.epage	290	en