CN107290727B - 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

Info

Publication number
CN107290727B
CN107290727B CN201710447882.XA CN201710447882A CN107290727B CN 107290727 B CN107290727 B CN 107290727B CN 201710447882 A CN201710447882 A CN 201710447882A CN 107290727 B CN107290727 B CN 107290727B
Authority
CN
China
Prior art keywords
modulation
signal
decoy
parameter
isar
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710447882.XA
Other languages
English (en)
Other versions
CN107290727A (zh
Inventor
潘小义
王伟
冯德军
顾赵宇
张文明
戴少奇
张一丁
陈吉源
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
National University of Defense Technology
Original Assignee
National University of Defense Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by National University of Defense Technology filed Critical National University of Defense Technology
Priority to CN201710447882.XA priority Critical patent/CN107290727B/zh
Publication of CN107290727A publication Critical patent/CN107290727A/zh
Application granted granted Critical
Publication of CN107290727B publication Critical patent/CN107290727B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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]

Landscapes

  • 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f0，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)＝σiexp(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是频率变量；
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(Δu,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；具体为：
其中，ω为转速，f0为雷达信号频率；
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。
CN201710447882.XA 2017-06-14 2017-06-14 一种位置可控式isar假目标图像合成方法 Active CN107290727B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710447882.XA CN107290727B (zh) 2017-06-14 2017-06-14 一种位置可控式isar假目标图像合成方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710447882.XA CN107290727B (zh) 2017-06-14 2017-06-14 一种位置可控式isar假目标图像合成方法

Publications (2)

Publication Number Publication Date
CN107290727A CN107290727A (zh) 2017-10-24
CN107290727B true CN107290727B (zh) 2019-10-11

Family

ID=60096397

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710447882.XA Active CN107290727B (zh) 2017-06-14 2017-06-14 一种位置可控式isar假目标图像合成方法

Country Status (1)

Country Link
CN (1) CN107290727B (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111521976B (zh) * 2020-04-23 2023-03-24 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
"On deception jamming for countering bistatic ISAR based on sub-Nyquist sampling";Xiaoyi Pan等;《IET Radar, sonar and navigation》;20140303;第8卷(第3期);第173-179页 *

Also Published As

Publication number Publication date
CN107290727A (zh) 2017-10-24

Similar Documents

Publication Publication Date Title
CN106646398B (zh) 基于多相位分段调制雷达干扰的有源伪装防护方法与装置
Xu et al. Range ambiguous clutter suppression for airborne FDA-STAP radar
Contu et al. Passive multifrequency forward-scatter radar measurements of airborne targets using broadcasting signals
Chang et al. A barrage noise jamming method based on double jammers against three channel SAR GMTI
Kang et al. Bistatic-ISAR distortion correction and range and cross-range scaling
Li et al. Bistatic forward-looking SAR ground moving target detection and imaging
CN107390181A (zh) 一种基于多波束扫描的雷达高分辨成像方法
CN113093122B (zh) 一种对合成孔径雷达快速场景欺骗干扰的方法
Amiri et al. Micro-Doppler based target classification in ground surveillance radar systems
CN107290727B (zh) 一种位置可控式isar假目标图像合成方法
CN107153191B (zh) 一种针对隐形飞机的双基isar成像检测方法
Dong et al. A novel scattered wave deception jamming against three channel SAR GMTI
Liu et al. The interferometry phase of InSAR coherent jamming with arbitrary waveform modulation
CN110471040B (zh) 一种基于fda天线的逆合成孔径雷达干扰方法
Grathwohl et al. UAV-based bistatic SAR-imaging using a stationary repeater
Chung et al. Analysis on the impact of constellation configuration over multistatic SAR images
KR20190012069A (ko) 지상배열안테나 시스템 및 지상배열안테나 시스템에서 상공의 탐지 영역의 이미지를 획득하는 방법
Felguera-Martin et al. Interferometric ISAR imaging on maritime target applications: Simulation of realistic targets and dynamics
Costa et al. Static Reflectivity and Micro-Doppler Signature of Drones for Distributed ICAS
Costa et al. Bistatic Reflectivity and Micro-Doppler Signatures of Drones for Integrated Communication and Sensing
Gong et al. Comparison of Two Typical Drone Detection Radar Systems with Different Radar Dwell Time
Lee et al. Identification of a flying multi-rotor platform by high resolution ISAR through an experimental analysis
Chang et al. Micro and mini drone classification based on coherent radar imaging
Garry et al. Framework and results on passive ISAR
Shen et al. Simultaneous polarization measurement and high-resolution imaging algorithm inspired by bat sound waveform

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant