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复杂多径信号下基于空域变换的米波雷达稳健测高算法

陈根华 陈伯孝

陈根华, 陈伯孝. 复杂多径信号下基于空域变换的米波雷达稳健测高算法[J]. 电子与信息学报, 2020, 42(5): 1297-1302. doi: 10.11999/JEIT190554
引用本文: 陈根华, 陈伯孝. 复杂多径信号下基于空域变换的米波雷达稳健测高算法[J]. 电子与信息学报, 2020, 42(5): 1297-1302. doi: 10.11999/JEIT190554
Genhua CHEN, Baixiao CHEN. Robust Altitude Estimation Based on Spatial Sign Transform in the Presence of Diffuse Multipath for Very High Frequency Radar[J]. Journal of Electronics & Information Technology, 2020, 42(5): 1297-1302. doi: 10.11999/JEIT190554
Citation: Genhua CHEN, Baixiao CHEN. Robust Altitude Estimation Based on Spatial Sign Transform in the Presence of Diffuse Multipath for Very High Frequency Radar[J]. Journal of Electronics & Information Technology, 2020, 42(5): 1297-1302. doi: 10.11999/JEIT190554

复杂多径信号下基于空域变换的米波雷达稳健测高算法

doi: 10.11999/JEIT190554
基金项目: 国家自然科学基金(61401187),江西省教育厅科学技术研究项目(GJJ170990)
详细信息
    作者简介:

    陈根华:男,1980年生,副教授,博士,研究方向为阵列雷达信号处理

    陈伯孝:男,1966年生,教授,博士生导师,研究方向为新体制雷达系统设计及其实现、雷达信号处理、目标精确制导与跟踪等

    通讯作者:

    陈根华 cghnit@126.com

  • 中图分类号: TN958

Robust Altitude Estimation Based on Spatial Sign Transform in the Presence of Diffuse Multipath for Very High Frequency Radar

Funds: The National Natural Science Foundation of China(61401187), The Science Research of Jiangxi Provincial Department of Education(GJJ170990)
  • 摘要:

    针对米波(VHF)雷达的复杂多径信号中散射分量的非高斯性严重影响测高的稳定性,该文提出了稳健的空域符号变换最大似然测高算法。该算法先对多维阵列快拍矢量进行空域符号变换处理,以抑制散射分量野值点对阵列协方差矩阵及其测高算法的影响,再计算符号协方差矩阵(SCM),然后根据符号协方差矩阵的映射等效性和特征空间不变性,将符号协方差矩阵应用到最大似然(SCM-ML)测高算法中,实现了稳健的米波雷达低角测高。该算法有效抑制了多径信号中散射分量和波束打地形成的强杂波的非高斯性,提高了米波雷达低角测高的稳健性。仿真结果和实测数据验证了算法的稳健性与有效性。

  • 图  1  复杂环境下米波雷达低角目标测高示意图

    图  2  空域符号变换示意图

    图  3  某相控阵米波雷达低角目标回波序列

    图  4  符号变换后SCM特征值分布

    图  5  SCM-ML测高算法精度

    图  6  SCM-ML测高算法低角估计分布

    图  7  SCM-ML稳健性能分析及测高算法分辨性能

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出版历程
  • 收稿日期:  2019-07-24
  • 修回日期:  2020-02-24
  • 网络出版日期:  2020-03-21
  • 刊出日期:  2020-06-04

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