系统工程与电子技术 ›› 2023, Vol. 45 ›› Issue (4): 1024-1031.doi: 10.12305/j.issn.1001-506X.2023.04.11

• 传感器与信号处理 • 上一篇    

星载双基地雷达杂波建模及特性分析

倪萌钰1,*, 陈辉1, 王晓戈1, 程杨2, 李槟槟1   

  1. 1. 空军预警学院, 湖北 武汉 430019
    2. 中国人民解放军95662部队, 西藏 拉萨 850000
  • 收稿日期:2021-07-26 出版日期:2023-03-29 发布日期:2023-03-28
  • 通讯作者: 倪萌钰
  • 作者简介:倪萌钰(1994—), 女, 博士研究生, 主要研究方向为阵列信号处理
    陈辉(1974—), 男, 教授, 博士, 主要研究方向为空间谱估计、阵列信号处理
    王晓戈(1996—), 男, 博士研究生, 主要研究方向为阵列信号处理
    程杨(1990—), 男, 助理工程师, 硕士,主要研究方向为预警情报分析、装备保障工程
    李槟槟(1990—), 男, 讲师, 博士, 主要研究方向为阵列信号处理

Clutter modeling and characteristic analysis of spaceborne bistatic radar

Mengyu NI1,*, Hui CHEN1, Xiaoge WANG1, Yang CHENG2, Binbin LI1   

  1. 1. Air Force Early Warning Academy, Wuhan 430019, China
    2. Unit 95662 of the PLA, Lhasa 850000, China
  • Received:2021-07-26 Online:2023-03-29 Published:2023-03-28
  • Contact: Mengyu NI

摘要:

星载双基地雷达对增强隐身目标的雷达散射截面等有更大的优势, 但其杂波较单基地星载雷达杂波分布更为复杂。为了解决星载双基地雷达的问题, 建立了以地球模型为基础、以地心和双卫星连线中点为原点的两个直角坐标系, 通过联立构造的椭球面方程和参数方程建立了星载双基地雷达几何模型, 提出了基于构建的星载双基地雷达模型的杂波多普勒频率构建方法, 最后具体分析了工作频率的变化对多普勒频率的影响。与现有模型相比, 所提模型简化了运算过程, 需已知的参数信息相对较少, 可适用于更多双/多基地场景。仿真结果表明双基地距离和取值越大或工作频率取值越大, 杂波展宽越严重。

关键词: 星载双基地雷达, 杂波, 坐标转换, 多普勒频率, 信号频率

Abstract:

Spaceborne bistatic radar has greater advantages such as enhancing radar cross section of stealth target. The clutter distribution of spaceborne bistatic radar is more complex than that of the spaceborne radar. In order to solve the problem of spaceborne bistatic radar clutter, two coordinate systems are established. Both are based on the earth model, and one takes the center of the earth as the origin, and the other is based on the midpoint of the line between two satellites as the origin. The geometric model of the spaceborne bistatic radar is established by using the corresponding ellipsoid equation and parameter equation and the clutter Doppler frequency construction method based on the constructed spaceborne bistatic radar model is proposed. Finally, the influence of operating frequency on Doppler frequency is analyzed. Compared with the existing models, the proposed model simplifies the operation process, requires less known parameter information and can be applied to more bistatic/multistatic scenarios. Meanwhile, the simulation result shows that the larger the value of the isometric contour or the larger the value of operating frequency, the more serious the clutter broadening becomes.

Key words: spaceborne bistatic radar, clutter, coordinate conversion, Doppler frequency, signal frequency

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