| 引用本文: | 王罗胜斌,徐振海,刘兴华,等.阵列雷达自适应多零点单脉冲群目标测角算法.[J].国防科技大学学报,2019,41(3):1-6,158.[点击复制] |
| WANG Luoshengbin,XU Zhenhai,LIU Xinghua,et al.Angular estimation of group targets using adaptive multi-null monopulse for array radar[J].Journal of National University of Defense Technology,2019,41(3):1-6,158[点击复制] |
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| 阵列雷达自适应多零点单脉冲群目标测角算法 |
| 王罗胜斌, 徐振海, 刘兴华, 董玮, 王国玉 |
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(国防科技大学 电子科学学院 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: |
| 针对阵列体制雷达，由极大似然估计导出自适应多零点单脉冲测角原理。分析发现迭代步长过大导致双零点单脉冲技术在多目标条件下失效，因此提出加权步长改进角度估计的迭代过程，只需要较少计算量就能实现群内多个目标的精确测角。仿真结果表明：该算法在较高信噪比条件下可以精确测量群内三个目标角度，测角误差约为0.15倍波束宽度；当群目标数较多或者目标相位差接近于0时，算法性能下降明显。 |
| 关键词: 群目标测角 极大似然估计 自适应多零点单脉冲 加权步长 |
| DOI：10.11887/j.cn.201903001 |
| 投稿日期：2018-03-14 |
| 基金项目:国家自然科学基金资助项目（61471372）；天线与微波技术国家重点实验室基金资助项目（61424020301162402005） |
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| Angular estimation of group targets using adaptive multi-null monopulse for array radar |
| WANG Luoshengbin, XU Zhenhai, LIU Xinghua, DONG Wei, WANG Guoyu |
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(State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,College of Electronic Science, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| The adaptive multi-null monopulse principle of phased array radar， derived from the maximum likelihood estimation, was introduced. It was found that the failure of double-null monopulse technique in multiple group targets was caused by a large iteration step. In order to optimize the iteration in angular estimation, a method of weighted step was proposed. By the proposed method, an accurate angular estimation of multiple group targets was achieved with a few computations. Several simulation results demonstrate that the angular estimation error of three targets is about 0.15 beamwidth in medium signal to noise ratio. However, the performance will get worse when there are a large number of group targets or the phase offset of echoes is closed to 0. |
| Keywords: angular estimation of group targets maximum likelihood estimation adaptive multi-null monopulse weighted step |
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