用于SAR与通信一体化系统的滤波器组多载波波形

朱柯弘 王杰 梁兴东 吴一戎

朱柯弘, 王杰, 梁兴东, 吴一戎. 用于SAR与通信一体化系统的滤波器组多载波波形[J]. 雷达学报, 2018, 7(5): 602-612. doi: 10.12000/JR18038
引用本文: 朱柯弘, 王杰, 梁兴东, 吴一戎. 用于SAR与通信一体化系统的滤波器组多载波波形[J]. 雷达学报, 2018, 7(5): 602-612. doi: 10.12000/JR18038
Zhu Kehong, Wang Jie, Liang Xingdong, Wu Yirong. Filter Bank Multicarrier Waveform Used for Integrated SAR and Communication Systems[J]. Journal of Radars, 2018, 7(5): 602-612. doi: 10.12000/JR18038
Citation: Zhu Kehong, Wang Jie, Liang Xingdong, Wu Yirong. Filter Bank Multicarrier Waveform Used for Integrated SAR and Communication Systems[J]. Journal of Radars, 2018, 7(5): 602-612. doi: 10.12000/JR18038

用于SAR与通信一体化系统的滤波器组多载波波形

doi: 10.12000/JR18038
基金项目: 国家部委基金
详细信息
    作者简介:

    朱柯弘(1992–),男,重庆人;北京理工大学学士;中国科学院电子学研究所博士研究生;主要研究方向为SAR与通信一体化波形技术。E-mail: tyler523@163.com

    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

    梁兴东(1973–),男,陕西人;北京理工大学博士;中国科学院电子学研究所研究员;研究方向为高分辨率合成孔径雷达系统、干涉合成孔径雷达、成像处理及应用、实时数字信号处理等。E-mail: xdliang@mail.ie.ac.cn

    吴一戎(1963–),男,安徽人;中国科学院电子学研究所博士;中国科学院院士,研究员,研究方向为微波成像理论、微波成像技术和雷达信号处理。E-mail: wyr@mail.ie.ac.cn

    通讯作者:

    梁兴东   xdliang@mail.ie.ac.cn

Filter Bank Multicarrier Waveform Used for Integrated SAR and Communication Systems

Funds: The National Ministries Foundation
  • 摘要: 合成孔径雷达(SAR)与通信一体化可提升SAR的信息交互能力,实现探测数据实时传输,提升系统整体性能。一体化平台在工作过程中,将引入多普勒偏移和多径效应,这使得广泛研究的正交频分复用(OFDM)一体化波形的正交性无法保持,成像与通信性能受限。该文提出利用滤波器组多载波(FBMC)波形实现SAR与通信一体化,一方面,FBMC波形对子载波间的正交性要求低,可以对抗多普勒与多径效应,另一方面,FBMC波形不采用循环前缀(CP),因此可以避免出现虚假目标,提升了频谱利用率。该文分析了FBMC波形的一体化性能,针对一体化系统中的多径效应与多普勒偏移对FBMC波形的影响展开了研究,并针对大频偏的情况提出了适用于FBMC一体化波形的多普勒补偿算法。基于FBMC的SAR与通信一体化波形在宽测绘带SAR与通信一体化系统中有更好的性能,仿真试验验证了该结论。

     

  • 图  1  SAR与通信一体化系统的几何模型

    Figure  1.  Geometric model of SAR and communication integration system

    图  2  OFDM与FBMC子载波频域对比

    Figure  2.  Subcarrier comparison between OFDM and FBMC

    图  3  OFDM平均模糊函数

    Figure  3.  OFDM average ambiguity function

    图  4  FBMC平均模糊函数

    Figure  4.  FBMC average ambiguity function

    图  5  多径效应对波形正交性的影响示意图

    Figure  5.  The multipath effect on the orthogonality of waveforms

    图  6  多径时延下的成像与通信性能对比

    Figure  6.  Comparison of imaging and communication performance under multipath delay

    图  7  多普勒频偏影响OFDM波形正交性的示意图

    Figure  7.  The Doppler effects on the orthogonality of waveforms

    图  8  归一化频偏下的误码率曲线

    Figure  8.  Bit error rate under normalized frequency shift

    图  9  多普勒频偏下的成像性能对比图

    Figure  9.  Imaging performance comparison under doppler shift

    图  10  FBMC波形多普勒补偿流程

    Figure  10.  FBMC waveform doppler compensation process

    图  11  一体化系统通信性能仿真结果

    Figure  11.  Integrated system communication performance simulation results

    图  13  点目标距离向切片分析

    Figure  13.  Point target range slice analysis

    图  14  一体化系统面目标成像性能仿真结果

    Figure  14.  Integrated system surface target imaging performance simulation results

    图  12  一体化系统点目标成像性能仿真结果

    Figure  12.  Integrated system point target imaging performance simulation results

    表  1  原型滤波器系数

    Table  1.   Prototype filter coefficients

    K H0 H1 H2 H3
    2 1 $\sqrt 2 /2$
    3 1 0.911438 0.411438
    4 1 0.971960 $\sqrt 2 /2$ 0.235147
    下载: 导出CSV

    表  2  仿真参数

    Table  2.   Simulation parameters

    参数 数值
    信号时宽(μs) 40
    信号带宽(MHz) 120
    采样频率(MHz) 200
    信号载频(GHz) 5.4
    平台速度(m/s) 6000
    多普勒带宽(Hz) 4000
    PRF (Hz) 5000
    信道信噪比(dB) 10
    测绘带宽(km) 6
    下载: 导出CSV

    表  3  点目标成像质量分析

    Table  3.   Point target imaging quality analysis

    对应图像 OFDM补偿前 FBMC补偿前 OFDM补偿后 FBMC补偿后
    PSLR (dB) 13.32 13.35 13.33 13.39
    ISLR (dB) 2.5498 9.0870 8.0321 9.6827
    下载: 导出CSV
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出版历程
  • 收稿日期:  2018-05-04
  • 修回日期:  2018-06-25
  • 网络出版日期:  2018-10-28

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