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基于抛物方程的低空空域监测雷达城市环境地杂波强度分布建模

雷鹏 冉志强 王俊 刘晓敏

雷鹏, 冉志强, 王俊, 等 . 基于抛物方程的低空空域监测雷达城市环境地杂波强度分布建模[J]. 北京航空航天大学学报, 2018, 44(1): 63-70. doi: 10.13700/j.bh.1001-5965.2017.0037
引用本文: 雷鹏, 冉志强, 王俊, 等 . 基于抛物方程的低空空域监测雷达城市环境地杂波强度分布建模[J]. 北京航空航天大学学报, 2018, 44(1): 63-70. doi: 10.13700/j.bh.1001-5965.2017.0037
LEI Peng, RAN Zhiqiang, WANG Jun, et al. Parabolic equation based land clutter power map modeling for low-altitude surveillance radar in urban areas[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(1): 63-70. doi: 10.13700/j.bh.1001-5965.2017.0037(in Chinese)
Citation: LEI Peng, RAN Zhiqiang, WANG Jun, et al. Parabolic equation based land clutter power map modeling for low-altitude surveillance radar in urban areas[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(1): 63-70. doi: 10.13700/j.bh.1001-5965.2017.0037(in Chinese)

基于抛物方程的低空空域监测雷达城市环境地杂波强度分布建模

doi: 10.13700/j.bh.1001-5965.2017.0037
基金项目: 

国家自然科学基金 61501011

国家自然科学基金 61671035

详细信息
    作者简介:

    雷鹏  男, 博士, 讲师。主要研究方向:信号处理、模式识别

    通讯作者:

    雷鹏, E-mail: peng.lei@buaa.edu.cn

  • 中图分类号: TN951;TN955;V19

Parabolic equation based land clutter power map modeling for low-altitude surveillance radar in urban areas

Funds: 

National Natural Science Foundation of China 61501011

National Natural Science Foundation of China 61671035

More Information
  • 摘要:

    地杂波强度是影响雷达低空空域监测性能的重要因素之一。尤其在城市环境下,高层建筑和大气结构将使雷达信号传播及地表电磁散射特性产生复杂变化。提出一种基于抛物方程(PE)的城市环境地杂波强度分布建模方法,能够为低空空域监测雷达系统性能预估、站址选择和杂波特性分析提供理论基础。首先,通过宽角PE模型,预测城市高层建筑及大气结构引起的雷达信号反射、绕射、折射和多径效应;其次,将宽角PE模型扩展到三维空间,结合雷达方程,实现各杂波单元的强度计算;最后,利用仿真结果分析了不同建筑外形和高层建筑群对雷达信号传播和地杂波强度的影响。

     

  • 图 1  PE迭代求解过程

    Figure 1.  Iterative procedure of PE solution

    图 2  地杂波强度分布建模流程图

    Figure 2.  Flowchart of land clutter power map modeling

    图 3  简化建筑模型

    Figure 3.  Simplified building models

    图 4  边界平移法

    Figure 4.  Boundary shift method

    图 5  直角坐标系到雷达极坐标系的正向转换

    Figure 5.  Forward transformation from Cartesian grid to radar polar coordinate system

    图 6  照射面积计算示意图

    Figure 6.  Illustration of clutter irradiated area calculation

    图 7  矩形建筑条件下的雷达信号传播特性

    Figure 7.  Propagation characteristics of radar signals over a rectangular building

    图 8  帆形建筑条件下的雷达信号传播特性

    Figure 8.  Propagation characteristics of radar signals over a sail-shaped building

    图 9  建筑群分布示意图

    Figure 9.  Illustration of building distribution

    图 10  城市建筑群环境下的雷达信号传播特性

    Figure 10.  Propagation characteristics of radar signals over urban buildings

    图 11  地杂波强度分布结果

    Figure 11.  Result of land clutter power map

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出版历程
  • 收稿日期:  2017-01-18
  • 录用日期:  2017-02-24
  • 刊出日期:  2018-01-20

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