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基于FDA-MIMO的距离欺骗干扰鉴别方法

张昭建 谢军伟 李欣 盛川 胡祺勇

张昭建, 谢军伟, 李欣, 等 . 基于FDA-MIMO的距离欺骗干扰鉴别方法[J]. 北京航空航天大学学报, 2017, 43(4): 738-746. doi: 10.13700/j.bh.1001-5965.2016.0257
引用本文: 张昭建, 谢军伟, 李欣, 等 . 基于FDA-MIMO的距离欺骗干扰鉴别方法[J]. 北京航空航天大学学报, 2017, 43(4): 738-746. doi: 10.13700/j.bh.1001-5965.2016.0257
ZHANG Zhaojian, XIE Junwei, LI Xin, et al. Discrimination method of range deception jamming based on FDA-MIMO[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(4): 738-746. doi: 10.13700/j.bh.1001-5965.2016.0257(in Chinese)
Citation: ZHANG Zhaojian, XIE Junwei, LI Xin, et al. Discrimination method of range deception jamming based on FDA-MIMO[J]. Journal of Beijing University of Aeronautics and Astronautics, 2017, 43(4): 738-746. doi: 10.13700/j.bh.1001-5965.2016.0257(in Chinese)

基于FDA-MIMO的距离欺骗干扰鉴别方法

doi: 10.13700/j.bh.1001-5965.2016.0257
基金项目: 

国家自然科学基金 61501500

详细信息
    作者简介:

    张昭建, 男, 博士研究生。主要研究方向:雷达电子对抗理论与技术

    谢军伟, 男, 博士生导师。主要研究方向:雷达电子对抗理论与技术

    通讯作者:

    谢军伟, E-mail:fdxiejunwei@163.com

  • 中图分类号: TN974

Discrimination method of range deception jamming based on FDA-MIMO

Funds: 

National Natural Science Foundation of China 61501500

More Information
  • 摘要:

    提出了一种基于频率分集阵列多输入多输出(FDA-MIMO)的距离欺骗干扰鉴别方法。FDA-MIMO中,目标回波在阵元间产生的相位差及空间角频率与距离、角度呈线性关系,而假目标不满足该关系。本文对目标回波和多类假目标在FDA-MIMO接收端的相位差、空间角频率进行了理论推导,详细分析了上下变频、匹配滤波、信号混合、移频等因素的影响,给出了假目标鉴别的具体流程。理论分析及仿真结果表明,该方法能准确提取混合信号的相位差及空间角频率信息,有效对抗多种类型的转发式欺骗干扰。

     

  • 图 1  ULA FDA结构示意图

    Figure 1.  Structure diagram of ULA FDA

    图 2  回波信号在两阵元间的相位差

    Figure 2.  Phase difference between two array elements of echo signal

    图 3  间歇采样干扰信号与回波信号的匹配滤波输出

    Figure 3.  Matched filtering output of interrupted-sampling jamming and echo signals

    图 4  回波信号、间歇采样干扰信号 (无移频和1 MHz移频) 与混合信号匹配滤波输出的阵元间相位差

    Figure 4.  Matched filtering output's phase difference of echo signals, interrupted-sampling jamming signals (without any frequency shift and with 1 MHz frequency shift) and mixed signals

    图 5  重复采样干扰信号与回波信号的匹配滤波输出

    Figure 5.  Matched filtering output of repeated-sampling jamming and echo signals

    图 6  回波信号、重复采样干扰信号 (无移频和1 MHz移频) 与混合信号匹配滤波输出的阵元间相位差

    Figure 6.  Matched filtering output's phase difference of echo signals, repeated-sampling jamming signals (without any frequency shift and with 1 MHz frequency shift) and mixed signals

    图 7  不同干信比下,混合信号各峰值相位差与理论相位差对比

    Figure 7.  Comparison between peak's phase difference of mixed signal and theoretic phase difference under different JSRs

    图 8  回波与间歇采样干扰信号的空间角频率测量值

    Figure 8.  Measured spatial frequency of echo and interrupted-sampling jamming signals

    图 9  回波与重复采样干扰信号的空间角频率测量值

    Figure 9.  Measured spatial frequency of echo and repeated-sampling jamming signals

    表  1  不同干信比下回波信号、间歇采样干扰信号及混合信号在两阵元间的相位差

    Table  1.   Phase difference between two array elements of echo, interrupted-sampling jamming and mixed signals under different JSRs

    信号类型 峰值指示距离/km 目标类型 各距离相位差理论值/rad 不同干信比下相位差测量值/rad
    JSR=6 dB JSR=9 dB JSR=12 dB JSR=20 dB
    回波 30.0 5.026 5.026 5.026 5.026 5.026
    干扰1 31.5 4.960 5.026 5.026 5.026 5.026
    干扰2 28.5 5.089 4.901 4.909 4.909 4.909
    混合1 30.0 5.026 5.026 5.026 5.026 5.026
    混合1 31.5 4.960 5.026 5.026 5.026 5.026
    混合2 30.0 5.026 5.026 5.026 5.026 5.026
    混合2 28.5 5.089 4.909 4.901 4.901 4.901
    下载: 导出CSV

    表  2  不同干信比下回波信号、重复采样干扰信号及混合信号在两阵元间的相位差

    Table  2.   Phase difference between two array elements of echo, repeated-sampling jamming and mixed signals under different JSRs

    信号类型 峰值指示距离/km 目标类型 各距离相位差理论值/rad 不同干信比下相位差测量值/rad
    JSR=6 dB JSR=9 dB JSR=12 dB JSR=20 dB
    回波 30.00 5.026 5.026 5.026 5.026 5.026
    混合1 30.00 5.026 5.022 5.021 5.021 5.021
    混合1 30.75 5.000 5.020 5.020 5.030 5.030
    混合1 31.50 4.960 5.020 5.020 5.020 5.020
    混合1 32.25 4.930 5.030 5.040 5.010 5.000
    混合2 30.00 5.026 5.028 5.033 5.034 5.039
    混合2 27.75 5.120 4.820 4.790 4.790 4.790
    混合2 28.50 5.090 4.900 4.900 4.900 4.900
    混合2 29.25 5.060 4.930 4.920 4.920 4.920
    下载: 导出CSV

    表  3  回波与间歇采样干扰信号的空间角频率

    Table  3.   Spatial frequency of echo and interrupted-sampling jamming signals

    信号类型 峰值指示
    距离/km
    理论空间
    角频率/Hz
    实际空间
    角频率/Hz
    回波 30.0 5.34 5.354
    干扰1 31.5 5.26 5.354
    干扰2 28.5 5.40 6.562
    注:干扰1不含移频,干扰2含1 MHz移频。
    下载: 导出CSV

    表  4  回波与重复采样干扰信号的空间角频率

    Table  4.   Measured spatial frequency of echo and repeated-sampling jamming signals

    信号类型 峰值指示距离/km 理论空间角频率/Hz 实际空间角频率/Hz
    回波 30.00 5.336 5.332
    干扰1 30.75 5.300 5.332
    干扰1 31.50 5.270 5.332
    干扰1 32.25 5.220 5.332
    干扰2 27.75 5.430 6.562
    干扰2 28.50 5.400 6.510
    干扰2 29.25 5.370 6.510
    注:干扰1不含移频,干扰2含1 MHz移频。
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-04-05
  • 录用日期:  2016-06-03
  • 网络出版日期:  2017-04-20

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