弹道目标高分辨一维距离像运动补偿研究

曹敏; 付耀文; 黄雅静; 黎湘; 庄钊文

doi:10.3724/SP.J.1146.2007.01655

弹道目标高分辨一维距离像运动补偿研究

doi: 10.3724/SP.J.1146.2007.01655

基金项目:

国家部委基金资助课题

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出版历程
- 收稿日期: 2007-10-22
- 修回日期: 2008-07-07
- 刊出日期: 2009-03-19

Research on the Motion Compensation of the Ballistic Targets High Resolution Range Profile

摘要

摘要: 弹道中段目标运动形式复杂，高速运动的同时伴随自旋、进动、翻滚等微动，该文首先针对弹道目标运动特点，建立了去斜率处理的宽带雷达回波模型，定量分析了高速运动和微动对一维距离像的影响；然后针对高速运动严重影响一维距离像质量的问题，提出了一种新的一维距离像运动补偿方法，该方法将自适应时频变换技术和粒子群优化算法相结合，通过在二维时频平面内跟踪单个散射点的多普勒变化来估计目标速度，从而实现一维距离像运动补偿。仿真实验表明，该方法估计精度高、计算量低、对噪声有很强的鲁棒性，能有效补偿高速运动对弹道目标一维距离像的影响。
- 弹道目标;运动补偿;自适应联合时频变换;粒子群优化算法
Abstract: The motion of the ballistic target in midcourse is very complex, which has high flight speed and micro-motion such as spin, precession and tumble. According to its complex motion, wideband radar echo model after dechirping is firstly built. Then the influence of the high speed motion and micro-motion on the High Resolution Range Profile (HRRP) of the ballistic target is quantitatively analyzed. In order to improve the quality of the ballistic targets HRRP, a new motion compensation algorithm is proposed. The basic idea is to estimate velocity through Doppler tracking to a scatter, and the Doppler tracking is performed via an Adaptive Joint Time-Frequency (AJTF) technique and Particle Swarm Optimization (PSO) algorithm. Simulations show that the distorted HRRP can be corrected effectively by the proposed method which has a high estimate accuracy, low computational cost and good robust property.

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