| 天基雷达高速微弱目标的积累检测 |
| |
| 引用本文： | 杨志伟,贺顺,吴孙勇.天基雷达高速微弱目标的积累检测[J].宇航学报,2011,32(1). |
| |
| 作者姓名： | 杨志伟 贺顺 吴孙勇 |
| |
| 作者单位： | 1. 西安电子科技大学雷达信号处理重点实验室,西安,710071
2. 西安电子科技大学雷达信号处理重点实验室,西安,710071;西安科技大学通信与信息工程学院,西安,710054 |
| |
| 基金项目： | 国家自然科学基金，中央高校基本科研业务费专项资金，国防基础预研基金 |
| |
| 摘 要： | 本文研究天基雷达高速微弱目标的相干积累检测问题.首先根据回波高阶相位影响包络补偿效果的程度对数据进行分段处理;然后对每个数据段采用速度滤波器组进行划分和Keystone变换补偿包络走动并结合分数阶傅立叶变换估计回波相位历程;最后利用最小二乘方法拟合出目标的运动参数并对目标回波进行长时间相干积累.仿真结果表明本文方法具有良好的高速微弱目标积累检测性能.
|
| 关 键 词： | 天基雷达 运动补偿 积累检测 Keystone变换 分数阶傅立叶变换 |
A Long-Term Accumulated Detection Approach to High Speed Weak Target from Space-Borne Radars |
| |
| YANG Zhi-wei,HE Shun,WU Sun-yong.A Long-Term Accumulated Detection Approach to High Speed Weak Target from Space-Borne Radars[J].Journal of Astronautics,2011,32(1). |
| |
| Authors: | YANG Zhi-wei HE Shun WU Sun-yong |
| |
| Institution: | YANG Zhi-wei1,HE Shun1,2,WU Sun-yong1(1.National Laboratory of Radar Signal Processing,Xidian University,Xi'an 710071,China,2.Communication and Information Engineering Collage,Xi'an University of Science and Technology,Xi'an 710054,China) |
| |
| Abstract: | A long-term accumulated detection approach of weak target from space-borne radars is presented in this paper.Firstly,the signal is segmented based on the influence of echo's high order phase history on motion compensation.Secondly,the range migration is corrected by using Keystone transform and the phase history is estimated by using Fractal Fourier transform(FrFt) for each sub-segment.Finally,the motion parameters are fit by using least square algorithm among sub-segments and the long-term coherent accumul... |
| |
| Keywords: | Space-borne radar Motion compensation Integral detection Keystone transform Fractal Fourier transform |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
