Abstract
Abstract This paper introduces the inverse synthetic aperture radar(ISAR) imaging technique for rear view target of an automobile, which uses both linear frequency modulation-frequency shift keying(LFM-FSK) waveform and monopulse tracking. LFM-FSK waveform consists of two sequential stepped frequency waveforms with some frequency offset, and thus, can be used to generate ISAR images of rear view target of an automobile . However, ISAR images can often be blurred due to non-uniform change rate of relative aspect angle between radar and target. In order to address this problem, one-dimensional(1-D) Lagrange inter-polation technique in conjunction with angle information obtained from the monopulse tracking is applied to generate uniform data across the radar’s aspect angle. Simulation results show that the proposed method can provide focused ISAR images. Key words: ISAR, LFM-FSK Waveform, Automotive Radar o;p qrs htuvQY>wxWy_(‘ITz{|}~* x’(;p<h:c(NIPA-2013-H0203-13-1001). h@tGH th(Department of Electrical Engineering, Pohang University of Science and Technology) Manuscript received November 7, 2013 ; Revised December 3, 2013 ; Accepted December 4, 2013. (ID No. 20131107-111)Corresponding Author: Kyung-Tae Kim (e-mail: kkt@postech.ac.kr)
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