CN107290727A - 一种位置可控式isar假目标图像合成方法 - Google Patents

一种位置可控式isar假目标图像合成方法 Download PDF

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CN107290727A
CN107290727A CN201710447882.XA CN201710447882A CN107290727A CN 107290727 A CN107290727 A CN 107290727A CN 201710447882 A CN201710447882 A CN 201710447882A CN 107290727 A CN107290727 A CN 107290727A
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modulation
signal
isar
parameter
modulation factor
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CN107290727B (zh
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潘小义
王伟
冯德军
顾赵宇
张文明
戴少奇
张丁
张一丁
陈吉源
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National University of Defense Technology
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/021—Auxiliary means for detecting or identifying radar signals or the like, e.g. radar jamming signals
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/38—Jamming means, e.g. producing false echoes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
    • G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
    • G01S13/904—SAR modes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/88—Radar or analogous systems specially adapted for specific applications
    • G01S13/89—Radar or analogous systems specially adapted for specific applications for mapping or imaging
    • G01S13/90—Radar or analogous systems specially adapted for specific applications for mapping or imaging using synthetic aperture techniques, e.g. synthetic aperture radar [SAR] techniques
    • G01S13/904—SAR modes
    • G01S13/9064—Inverse SAR [ISAR]

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

本发明涉及一种位置可控式ISAR假目标图像合成方法，该方法步骤如下：第一步，对ISAR信号进行截获和采样，得到信号相位采样值信号；第二步，根据假目标合成模板形成图像调制参数；第三步，根据调制位置参数，形成横坐标调制因子和纵坐标调制因子；第四步，对采样信号进行调制转发。本发明优点在于：第一、调制方式较为简单，仅仅需要知道假目标散射点散射强度和相位信息。第二、可根据调制位置参数，灵活控制形成位置可控的假目标图像。

Description

一种位置可控式ISAR假目标图像合成方法
【技术领域】
本发明一种位置可控式ISAR假目标图像合成方法，涉及宽带微波成像雷达对抗领域，具体涉及逆合成孔径雷达(ISAR)有源假目标欺骗干扰技术，尤其涉及到一种位置可控式ISAR二维假目标图像合成方法。
【背景技术】
作为一种有源空间信息获取与处理手段，ISAR利用发射宽带信号获取距离高分辨，利用目标相对雷达运动合成虚拟天线孔径来获得方位高分辨。广义上理解，ISAR是一种二维雷达信号处理技术，获取的运动目标尤其是非合作运动目标的二维高分辨微波图像包含目标尺寸、形状、结构、材质及运动状态等信息，在目标分类、辨识等领域应用广泛，尤其在战场敌我识别、导弹精确制导等领域发展迅速。相应地，目标要达到保存自己、完成既定任务也亟需相应的ISAR对抗技术，有效合成假目标图像并结合相关干扰手段欺骗ISAR成像和识别系统已成为当前提高重要敏感目标生存力的紧迫需求。
【发明内容】
本发明要解决的技术问题是：提供一种位置可控式ISAR假目标图像合成方法，在转发式干扰条件下，合成相对干扰平台本身位置可控的ISAR假目标图像。
本发明一种位置可控式ISAR假目标图像合成方法，采取的技术方案如下：
第一步，对ISAR信号进行截获和采样，得到信号相位采样值信号
假设干扰机搭载在运动平台上，平台本身存在平动和转动，干扰机截获到雷达信号后，进行高保真采样，得到相位采样值φ(t)，其中t是时间。
第二步，根据假目标合成模板形成图像调制参数
依次取出假目标合成模板中各散射点参数(σi,φi)，其中σi是第i个散射点散射强度，φi是第i个散射点相位大小，合成图像调制参数Ei(f,t)，其中f是频率。
第三步，根据调制位置参数，形成横坐标调制因子和纵坐标调制因子
设调制位置参数为(Δμ,Δv)，其中Δu是横坐标，Δv是纵坐标，通过在截获信号快时间域调制对应的时延调制因子φΔv,即横坐标调制因子，在截获信号慢时间域调制相位变化因子φΔu，即纵坐标调制因子。
第四步，对采样信号进行调制转发
将步骤二得到的图像调制参数，步骤三得到的横坐标调制因子和纵坐标调制因子与截获到的信号，合成干扰信号转发。
本发明一种位置可控式ISAR假目标图像合成方法，优点在于：第一、调制方式较为简单，仅仅需要知道假目标散射点散射强度和相位信息。
第二、可根据调制位置参数，灵活控制形成位置可控的假目标图像。
【附图说明】
图1是搭载干扰机的平台模型；
图2是待合成的假目标图像散射点模型；
图3是合成的假目标图像。
【具体实施方式】
现结合附图，详述本发明具体实施方式：
一种位置可控式ISAR假目标图像合成方法，包括以下步骤：
第一步，对雷达信号进行截获采样，得到信号相位采样值信号：
设雷达信号频率为f，干扰机处截获信号相位为
其中π是圆周率，c是电磁波传播速度，Rt是干扰平台与雷达的距离。干扰机对来波信号进行采样，然后调制假目标信息并将信号转发回雷达处。
第二步，根据假目标合成模板形成图像调制参数：
设假目标模板包含有i＝1,2,...,N个散射点，设第i个散射点调制相位为
其中，ui和vi是假目标模板中该散射点的横纵坐标值，ω为转速。
形成的图像调制参数为：
Ei(f,t)＝σi exp(φi) (公式三)
第三步，根据调制位置参数，形成横坐标调制因子：
和纵坐标调制因子：
第四步，对采样信号进行调制转发：
将步骤二得到的图像调制参数、步骤三得到的横坐标调制因子和纵坐标调制因子调制至截获信号，合成干扰信号：
将上述干扰信号转发至ISAR处，即可通过调整位置参数为(Δu,Δv)大小，合成相对干扰机位置可控的ISAR假目标图像。
如图1所示，是搭载干扰机的平台散射点模型，图2是待合成的假目标图像散射点模型，图3是当Δu＝-20米，Δv＝20米时，所合成的假目标ISAR图像和干扰机平台所成ISAR图像。由成像结果可知，可通过位置参数(Δu,Δv)控制合成的假目标ISAR图像相对于干扰机平台的位置。

Claims (1)

1.一种位置可控式ISAR假目标图像合成方法，其特征在于：该方法步骤如下：
第一步，对ISAR信号进行截获和采样，得到信号相位采样值信号
假设干扰机搭载在运动平台上，平台本身存在平动和转动，干扰机截获到雷达信号后，进行高保真采样，得到相位采样值φ(t)，其中t是时间；
第二步，根据假目标合成模板形成图像调制参数
依次取出假目标合成模板中各散射点参数(σi,φi)，其中σi是第i个散射点散射强度，φi是第i个散射点相位大小，合成图像调制参数Ei(f,t)，其中f是频率；
第三步，根据调制位置参数，形成横坐标调制因子和纵坐标调制因子
设调制位置参数为(Δμ,Δv)，其中Δu是横坐标，Δv是纵坐标，通过在截获信号快时间域调制对应的时延调制因子φΔv,即横坐标调制因子，在截获信号慢时间域调制相位变化因子φΔu，即纵坐标调制因子；
第四步，对采样信号进行调制转发
将第二步得到的图像调制参数，步骤三得到的横坐标调制因子和纵坐标调制因子与截获到的信号，合成干扰信号转发。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111521976A (zh) * 2020-04-23 2020-08-11 桂林长海发展有限责任公司 一种空时自适应干扰处理方法、装置及存储介质

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8193967B2 (en) * 2008-12-10 2012-06-05 The United States Of America As Represented By The Secretary Of The Army Method and system for forming very low noise imagery using pixel classification
CN205490868U (zh) * 2016-03-03 2016-08-17 北京志光伯元科技有限公司 多运动目标捕捉与跟踪设备
CN106168661A (zh) * 2016-08-23 2016-11-30 中国人民解放军国防科学技术大学 随机捷变极化有源假目标的鉴别方法
CN106405517A (zh) * 2016-11-24 2017-02-15 中国人民解放军国防科学技术大学 针对脉冲多普勒雷达的微动假目标生成方法
US9651661B2 (en) * 2014-04-09 2017-05-16 Src, Inc. Methods and systems for local principal axis rotation angle transform

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8193967B2 (en) * 2008-12-10 2012-06-05 The United States Of America As Represented By The Secretary Of The Army Method and system for forming very low noise imagery using pixel classification
US9651661B2 (en) * 2014-04-09 2017-05-16 Src, Inc. Methods and systems for local principal axis rotation angle transform
CN205490868U (zh) * 2016-03-03 2016-08-17 北京志光伯元科技有限公司 多运动目标捕捉与跟踪设备
CN106168661A (zh) * 2016-08-23 2016-11-30 中国人民解放军国防科学技术大学 随机捷变极化有源假目标的鉴别方法
CN106405517A (zh) * 2016-11-24 2017-02-15 中国人民解放军国防科学技术大学 针对脉冲多普勒雷达的微动假目标生成方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
XIAOYI PAN等: ""On deception jamming for countering bistatic ISAR based on sub-Nyquist sampling"", 《IET RADAR, SONAR AND NAVIGATION》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111521976A (zh) * 2020-04-23 2020-08-11 桂林长海发展有限责任公司 一种空时自适应干扰处理方法、装置及存储介质

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