| 引用本文: | 徐振海,熊子源,宋聃,等.阵列雷达双零点单脉冲低角跟踪算法.[J].国防科技大学学报,2015,37(1):130-135.[点击复制] |
| XU Zhenhai,XIONG Ziyuan,SONG Dan,et al.Double-null monopulse low-angle tracking algorithm with array radars[J].Journal of National University of Defense Technology,2015,37(1):130-135[点击复制] |
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| 阵列雷达双零点单脉冲低角跟踪算法 |
| 徐振海, 熊子源, 宋聃, 肖顺平 |
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(国防科技大学 电子信息系统复杂电磁环境效应国家重点实验室，湖南 长沙410073)
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| 摘要: |
| 针对阵列雷达体制，从改进单脉冲的角度出发研究了低角跟踪问题。在多径阵列信号模型的基础上，利用极大似然估计原理推导了双零点单脉冲测角算法，通过数字波束形成实现双零点单脉冲系统修正和、差方向图。仿真分析了双零点单脉冲测角性能，得出测角性能与信噪比、目标仰角以及复反射系数的关系。用实测数据对该算法进行验证，结果表明：当目标仰角小于1/4波束宽度时，测角均方根误差达到1/40波束宽度，可以有效解决低角跟踪问题。 |
| 关键词: 阵列雷达 低角跟踪 多径 双零点 单脉冲 复反射系数 数字波束形成 |
| DOI：10.11887/j.cn.201501022 |
| 投稿日期：2013-12-19 |
| 基金项目:国家自然科学基金资助项目（61471372） |
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| Double-null monopulse low-angle tracking algorithm with array radars |
| XU Zhenhai, XIONG Ziyuan, SONG Dan, XIAO Shunping |
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(State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| According to array radar system, low-angle tracking problem was investigated from the perspective of revised mono-pulse. Firstly, based on the array signal model under multi-path conditions, the double-null mono-pulse algorithm was deduced by using the principle of Maximal Likelihood (ML) estimation. The revised sum-difference patterns were designed by digital beamforming (DBF). Simulation result shows the relation of double-null mono-pulse performance, SNR, target elevation, and complex reflection coefficient. Finally, measured data is used for validation. Result shows that the root of mean square error (RMSE) is still less than 1/40 of the beamwidth when the target elevation is less than 1/4 of the beamwidth. Therefore, the double-null mono-pulse algorithm is effective for low-angle tracking problem. |
| Keywords: array radar low-angle tracking multi-path double-null mono-pulse complex reflection coefficient digital beamforming |
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