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http://dx.doi.org/10.5515/KJKIEES.2014.25.9.930

Inverse Synthetic Aperture Radar Imaging Using Stepped Chirp Waveform  

Lee, Seong-Hyeon (Department of Electrical and Electronic Engineering, Pohang University of Science and Technology)
Kang, Min-Suk (Department of Electrical and Electronic Engineering, Pohang University of Science and Technology)
Park, Sang-Hong (Department of Electronic Engineering, Pukyong National University)
Shin, Seung-Yong (ISR Research Center, LIGnex1)
Yang, Eunjung (Agency for Defense Development)
Kim, Kyung-Tae (Department of Electrical and Electronic Engineering, Pohang University of Science and Technology)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.25, no.9, 2014 , pp. 930-937 More about this Journal
Abstract
Inverse synthetic aperture radar (ISAR) images can be generated by radar which radiates the electromagnetic wave to a target and receives signal reflected from the target. ISAR images can be widely used to target detection and recognition. This paper proposed a method of generation of high resolution ISAR images by synthesizing frequency spectrums of each stepped chirp waveform in one burst and sub-sampling in frequency domain. This process is performed over entire bursts during coherent processing interval. Conventional ISAR image generation method using stepped frequency waveform has a severe problem of short unambiguous range, loading to ghost phenomenon. However, this problem can be resolved by the proposed method. In simulations, we generate high resolution ISAR image of the moving target which is Boeing-737 aircraft model composed of several ideal point scatterers.
Keywords
ISAR; Stepped Chirp Waveform; Sub-Sampling; Translational Motion Compensation;
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