期刊文献+

基于进动的旋转对称弹头雷达成像方法 被引量:2

Radar Imaging Method of Revolution Warhead Based on Precession
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摘要 ISAR成像是弹道中段目标识别的重要手段。与弹道中段弹头进动引起的相对雷达的姿态变化相比,轨道运动引起的相对雷达的姿态变化相当缓慢,导致所需成像积累时间过长,且弹头的进动为基于轨道运动的成像的运动补偿带来了很大的困难。从旋转对称体的目标特性出发,本文建立了进动旋转对称弹头的多普勒域回波模型,从数学上推导了多普勒域回波的时频分布特性,并研究了进动目标的成像平面,从而提出了利用进动引起的目标相对雷达视线姿态变化进行弹道中段弹头ISAR成像的方法。与基于轨道运动的ISAR成像方法相比,该方法具有成像积累所需时间短、不需要进行复杂运动补偿的特点。仿真结果表明,本文提出的成像方法能有效解决旋转对称弹道中段弹头的成像问题。 ISAR imaging is an important method to target recognition in ballistic midcourse. The change of attitude induced by orbit motion is more slowly than that by precession, which causes long imaging time. Precession also brings difficulty to motion compensation of the imaging based on orbit motion. According to the scattering properties, the echo model of precession target in Doppler domain is established. The time-frequency distribution of the echo and imaging plane are analyzed in this paper. A radar imaging method of revolution warhead based on precession is proposed. The method has two advantages:short imaging time and non-need to complex motion compensation. The result of simulation shows the method proposed can effectively solve the imaging problem of revolution warhead in ballistic midcourse.
出处 《信号处理》 CSCD 北大核心 2009年第9期1333-1337,共5页 Journal of Signal Processing
基金 国家自然科学基金项目(60672033)
关键词 进动 弹头 ISAR 正弦调频信号 Precession Warhead ISAR Sinusoidal FM Signal
作者简介 刘进(1981-),男,江西人,博士生,研究方向为雷达成像、雷达极化信号处理、弹道导弹攻防对抗等。 王雪松(1972-),男,内蒙古人,教授,博士生导师,中国电子学会高级会员,主要从事雷达极化信号处理,信号处理与目标检测及识别,弹道导弹攻防对抗、综合电子战等领域研究。 李文臣(1972-),男,河北人,博士研究生,研究方向为雷达成像、雷达极化信号处理、电子系统建模仿真与评估、弹道导弹攻防对抗等。 王涛(1976-),男,河南人,博士,讲师,研究兴趣为雷达极化信息处理、雷达目标识别。
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参考文献11

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二级参考文献35

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