| 线性调频连续波雷达低空小目标长时间相参积累方法 |
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| 引用本文： | 郭立民,莫禹涵,刘鲁涛,郭晓冉.线性调频连续波雷达低空小目标长时间相参积累方法[J].国防科技大学学报,2022,44(4):190-197. |
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| 作者姓名： | 郭立民 莫禹涵 刘鲁涛 郭晓冉 |
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| 作者单位： | 哈尔滨工程大学 信息与通信工程学院, 黑龙江 哈尔滨 150001;中国人民解放军 |
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| 基金项目： | 国家自然科学基金资助项目(61801143)；中央高校基本科研业务费专项基金资助项目(3072020CF0815) 〖 |
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| 摘 要： | 针对小型无人机目标雷达回波弱、目标检测难的问题,研究了在线性调频连续波(linear frequency modulation continuous wave, LFMCW)体制雷达下的长时间相参积累方法。通过推导LFMCW雷达回波表达式,提出了基于时域差频信号线性调频-Z变换的拉东-傅里叶变换实现方法。评估了该方法的运算量,并与频域实现的方法进行对比。经过仿真和实测数据验证了本文算法对LFMCW雷达下的弱目标相参积累的有效性。
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| 关 键 词： | 弱目标检测 线性调频连续波雷达 长时间积累 拉东-傅里叶变换 线性调频-Z变换 |
| 收稿时间： | 2020/11/6 0:00:00 |
Long-term coherent integration method for low-altitude small targets of LFMCW radar |
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| GUO Limin,MO Yuhan,LIU Lutao,GUO Xiaoran.Long-term coherent integration method for low-altitude small targets of LFMCW radar[J].Journal of National University of Defense Technology,2022,44(4):190-197. |
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| Authors: | GUO Limin MO Yuhan LIU Lutao GUO Xiaoran |
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| Institution: | College of Information and Communiction Engineering, Harbin Engineering University, Harbin 150001, China; The PLA Unint 32181, Shijiazhuang 050000, China |
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| Abstract: | Aimed at the problem of weak radar echo of small unmanned aerial vehicle targets and difficult target detection. Long-term coherent integration method under the LFMCW(linear frequency modulation continuous wave) radar was studied. By deriving the expression of LFMCW radar echo, an Radon-Fourier transform implementation method based on Chirp-Z transform of time-domain beat signal was proposed. The computational complexity of this method was evaluated and compared with the method implemented in frequency domain. Simulation and measured data verified the effectiveness of this algorithm for the coherent integration of weak targets under LFMCW radar. |
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| Keywords: | weak target detection LFMCW radar long time integration Radon-Fourier transform Chirp-Z transform |
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