机载同时同频MIMO-SAR系统研究概述

王杰 丁赤飚 梁兴东 陈龙永 祁志美

王杰, 丁赤飚, 梁兴东, 陈龙永, 祁志美. 机载同时同频MIMO-SAR系统研究概述[J]. 雷达学报, 2018, 7(2): 220-234. doi: 10.12000/JR17046
引用本文: 王杰, 丁赤飚, 梁兴东, 陈龙永, 祁志美. 机载同时同频MIMO-SAR系统研究概述[J]. 雷达学报, 2018, 7(2): 220-234. doi: 10.12000/JR17046
Wang Jie, Ding Chibiao, Liang Xingdong, Chen Longyong, Qi Zhimei. Research Outline of Airborne MIMO-SAR System with Same Time-frequency Coverage[J]. Journal of Radars, 2018, 7(2): 220-234. doi: 10.12000/JR17046
Citation: Wang Jie, Ding Chibiao, Liang Xingdong, Chen Longyong, Qi Zhimei. Research Outline of Airborne MIMO-SAR System with Same Time-frequency Coverage[J]. Journal of Radars, 2018, 7(2): 220-234. doi: 10.12000/JR17046

机载同时同频MIMO-SAR系统研究概述

doi: 10.12000/JR17046
基金项目: 国家863计划项目(2013AA122201)
详细信息
    作者简介:

    王杰:王 杰(1986–),男,博士,现为中国科学院电子学研究所传感技术联合国家重点实验室博士后,主要从事多输入多输出合成孔径雷达、多维统一信号、雷达通信一体化等领域的研究工作。E-mail: wangjie110_ucas@sina.com

    丁赤飚(1969–),男,研究员,博士生导师,现任中国科学院电子学研究所副所长,主要从事合成孔径雷达、遥感信息处理和应用系统等领域的研究工作,先后主持多项国家863重点项目和国家级遥感卫星地面系统工程建设项目,曾获国家科技进步一等奖、二等奖各一项。E-mail: cbding@mail.ie.ac.cn

    梁兴东(1973–),男,研究员,博士生导师,现任中国科学院电子学研究所微波成像技术重点实验室常务主任,主要从事高分辨率合成孔径雷达系统、干涉合成孔径雷达系统、成像处理及应用和实时数字信号处理等领域的研究工作。E-mail: xdliang@mail.ie.ac.cn

    陈龙永(1979–),男,研究员,硕士生导师,现任中国科学院电子学研究所微波成像技术重点实验室常务副主任,主要从事高分辨率合成孔径雷达系统、干涉合成孔径雷达系统、微波成像新概念、新体制和新技术等领域的研究工作。E-mail: lychen@mail.ie.ac.cn

    祁志美(1967–),男,研究员,博士生导师,现任中国科学院电子学研究所传感技术联合国家重点实验室常务副主任,主要从事纳米光电功能材料、光MEMS技术、集成光波导传感器与系统、表界面光谱分析技术与仪器等领域的研究工作。E-mail: zhimei-qi@mail.ie.ac.cn

    通讯作者:

    梁兴东   xdliang@mail.ie.ac.cn

Research Outline of Airborne MIMO-SAR System with Same Time-frequency Coverage

Funds: The National 863 Program of China (2013AA122201)
  • 摘要: 针对传统合成孔径雷达(SAR)体制带来的模式单一、核心指标已接近极限等瓶颈问题,近年来提出了一种新体制多输入多输出合成孔径雷达(MIMO-SAR)。该雷达系统通过更多的收发阵元获得更为丰富的系统自由度,并以此突破传统SAR体制限制,实现高分辨率宽测绘带跨越发展和多模式协同。该文深度剖析了MIMO-SAR概念内涵与技术特点,概括了国内外研究现状与技术发展趋势,总结归纳了国际首部同时同频MIMO-SAR研制经验与飞行试验结果,并展望分析了MIMO SAR应用前景,以期为我国未来SAR技术奠定基础。

     

  • 图  1  MIMO-SAR分类示意图

    Figure  1.  Diagrammatic sketch of MIMO-SAR

    图  2  空时编码MIMO-SAR示意图[30]

    Figure  2.  Diagrammatic sketch of space-time coding MIMO-SAR[30]

    图  3  MIMO-SAR多维波形编码示意图[10]

    Figure  3.  Diagrammatic sketch of multidimensional waveform coding MIMO-SAR[10]

    图  4  基于DBF的多维波形解码成像示意图[5]

    Figure  4.  Diagrammatic sketch of multidimensional waveform decoding MIMO-SAR using DBF[5]

    图  5  弱化正交准则对SAR成像能力的影响示意图

    Figure  5.  Diagrammatic sketch of weakened orthogonality criterion impact on SAR imaging

    图  6  多维正交波形概念示意图[5]

    Figure  6.  Diagrammatic sketch of multidimensional orthogonal waveform[5]

    图  7  线性调频信号与OFDM信号成像结果比较图

    Figure  7.  Comparison between chirp and OFDM imaging results

    图  8  OFDM Chirp信号改进前后的频谱比较图

    Figure  8.  Comparison between the original and improved OFDM Chirp spectrum

    图  9  并行观测通道发射信号的多普勒频谱示意图

    Figure  9.  Diagrammatic sketch of Doppler spectrum simultaneously radiated by two channels

    图  10  MIMO-SAR系统框图

    Figure  10.  MIMO-SAR system topology

    图  11  MIMO-SAR挂载图

    Figure  11.  MIMO-SAR mounted on the plane

    图  12  高分宽幅成像结果

    Figure  12.  Imaging results of high resolution wide swath mode

    图  13  高分宽幅定标点扩展函数

    Figure  13.  Calibrated point spread function of high resolution wide swath mode

    图  15  宽幅模式定标点扩展函数

    Figure  15.  Calibrated point spread function of wide swath mode

    图  16  聚束模式定标点扩展函数

    Figure  16.  Calibrated point spread function of spotlighting mode

    图  14  多模式协同成像结果

    Figure  14.  Imaging results of multimodal operation

    表  1  同时同频MIMO-SAR系统参数

    Table  1.   Parameter of MIMO-SAR system with same time-frequency coverage

    总体参数 载频 5.4 GHz
    天线尺寸 1236 mm×128 mm
    相位中心数目 8个
    作用距离 10~100 km
    功耗 ≤1800 W
    高分宽幅模式 带宽 560 MHz
    时宽 75 μs
    幅宽 ≥30 km
    多模式 宽幅模式 带宽 100 MHz
    时宽 150 μs
    幅宽 50~70 km
    聚束模式 带宽 560 MHz
    时宽 150 μs
    幅宽 距离≥6 km,
    方位≥4 km
    GMTI模式 最小可检测速度 ≤10 km/h
    下载: 导出CSV
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  • 收稿日期:  2017-04-11
  • 修回日期:  2017-06-02
  • 刊出日期:  2018-04-28

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