Randomized Stepped Frequency ISAR Imaging

被引：0
|
作者：
Huang, Tianyao [1 ]
Liu, Yimin [1 ]
Li, Gang [1 ]
Wang, Xiqin [1 ]
机构：
[1] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
来源：
2012 IEEE RADAR CONFERENCE (RADAR) | 2012年
关键词：
ENTROPY MINIMIZATION; ALGORITHM; RADAR; AUTOFOCUS; TARGETS;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Linearly stepped frequency (LSF) waveforms are widely equipped in inverse synthetic aperture radar (ISAR), where the frequency is linearly altered with a fixed frequency step in each burst. ISAR employing randomized stepped frequency (RSF) modulation improves the rang-Doppler resolution, widens the unambiguous Doppler window, and enhances performance in electronic counter-countermeasures (ECCM). However in RSF radar, range profiles can severely spread when the radial velocity is unknown. In this paper, we analytically derive the return signal model of a target rectilinearly moving at invariable speed, and devise a new algorithm to estimate the velocity and reconstruct the image of target. Numerical results demonstrate the effectiveness of the algorithm.
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页数：5
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