一种SAR/GMTI系统距离模糊杂波抑制方法

doi:10.3969/j.issn.1001-2400.2017.05.021

摘要/Abstract

摘要：

针对星载广域高分合成孔径雷达地面运动目标检测系统脉冲重复频率较高时存在的距离模糊问题，提出了一种基于频率分集阵列的距离模糊杂波抑制方法．该方法利用各距离模糊区回波在发射空间频率域上相互分离的特点，设计一组滤波器分别提取各模糊区的动目标和杂波回波，并利用多个接收通道进行数字波束形成对各个距离模糊区分别完成杂波抑制．实验结果表明，该方法充分利用了系统通道数目资源，减弱了各模糊区杂波非均匀性的影响，实现了动目标回波无模糊重建，从而有效拓展了检测区域面积．

关键词: 合成孔径雷达, 目标检测, 频率分集阵列, 杂波抑制, 距离模糊

Abstract:

A range ambiguous clutter suppression approach based on frequency diverse array configuration is proposed to handle the range ambiguity of the space borne wide-swath high-resolution synthetic aperture radar ground moving target indication (SAR/GMTI) system with a high pulse repetition frequency. Since echoes from different ambiguous range regions are separable in the transmit spatial frequency domain, a filter bank is employed to extract echoes from each region, and then the transmit beam forming is implemented to suppress the clutter in each range region. Simulation results demonstrate that, by making full use of the limited channels, the proposed method could weaken the influence of heterogeneous clutter in each region and reconstruct moving target signals without range ambiguity, so as to expand the detection region evidently.

Key words: synthetic aperture radar, target detection, frequency diverse array, clutter suppression, range ambiguity

林晨晨;黄普明;王伟伟;李渝. 一种SAR/GMTI系统距离模糊杂波抑制方法[J]. 西安电子科技大学学报, 2017, 44(5): 121-126.

LIN Chenchen;HUANG Puming;WANG Weiwei;LI Yu. Range ambiguous clutter suppression for the SAR/GMTI system based on the frequency diverse array[J]. Journal of Xidian University, 2017, 44(5): 121-126.

参考文献

［1］ GEBERT N, KRIEGER G, MOREIRA M A. Digital Beamforming on Receive: Techniques and Optimization Strategies for High-resolution Wide-swath SAR Imaging［J］. IEEE Transactions on Aerospace and Electronic Systems, 2009, 45(2): 564-592.
［2］ ZHANG S X, XING M D, XIA X G, et al. Robust Clutter Suppression and Moving Target Imaging Approach for Multichannel in Azimuth High-resolution and Wide-swath Synthetic Aperture Radar［J］. IEEE Transactions on Geoscience and Remote Sensing, 2015, 53(2): 687-709.
［3］武其松, 井伟, 邢孟道, 等. MIMO-SAR大测绘带成像［J］. 电子与信息学报, 2009, 31(4): 772-775.
WU Qisong, JING Wei, XING Mengdao, et al. Wide Swath Imaging with MIMO-SAR［J］. Journal of Electronics & Information Technology, 2009, 31(4): 772-775.
［4］ BAUMGARTNER S V, KIREGER G. Simultaneous High-resolution Wide-swath SAR Imaging and Ground Moving Target Indication: Processing Approaches and System Concepts［J］. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2015, 8(11): 5015-5029.
［5］ SHU Y X, LIAO G S, YANG Z W. Design Considerations of PRF for Optimizing GMTI Performance in Azimuth Multichannel SAR Systems with HRWS Imaging Capability［J］. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(4): 2048-2063.
［6］ KRIEGER G. MIMO-SAR: Opportunities and Pitfalls［J］. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(5): 2628-2645.
［7］ WANG W Q. Large-area Remote Sensing in High-altitude High-speed Platform Using MIMO SAR［J］. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2013, 6(5): 2146-2158.
［8］ FAROOQ J. Frequency Diversity for Improving Synthetic Aperture Radar Imaging［D］. Air Force Institute of Technology, ProQuest Dissertations Publishing, 2009: 3351543.
［9］ LIU X, SUN C, YANG Y, et al. High-range-resolution Two-dimensional Imaging Using Frequency Diversity Multiple-input-multiple-output Sonar［J］. IET Radar, Sonar & Navigation, 2015, 10(5): 983-991.
［10］ WANG C H, XU J W, LIAO G S. A Range Ambiguity Resolution Approach for High-resolution and Wide-swath SAR Imaging Using Frequency Diverse Array［J］. IEEE Journal on Selected Topics in Signal Processing, 2017, 11(2): 336-346.
［11］ ANTONIK P, WICKS M C, GRIFFITHS H D, et al. Frequency Diverse Array Radars［C］//Proceedings of the IEEE National Radar Conference. Piscataway: IEEE, 2006: 215-217.
［12］ XU J W, ZHU S Q, LIAO G S. Range Ambiguous Clutter Suppression for Airborne FDA-STAP Radar［J］. IEEE Journal of Selected Topics in Signal Processing, 2015, 9(8): 1620-1631.
［13］ XU J W, LIAO G S, ZHU S Q, et al. Joint Range and Angle Estimation Using MIMO Radar with Frequency Diverse Array［J］. IEEE Transactions on Signal Processing, 2015, 63(13): 3396-3410.
［14］王伟伟, 吴孙勇, 许京伟, 等. 基于频率分集阵列的机载雷达距离模糊杂波抑制方法［J］. 电子与信息学报, 2015, 37(10): 2321-2327.
WANG Weiwei, WU Sunyong, XU Jingwei, et al. Range Ambiguity Clutter Suppression for Airborne Radar Based on Frequency Diverse Array［J］. Journal of Electronics & Information Technology, 2015, 37(10): 2321-2327.
［15］ ENDER J H G. Space-time Processing for Multichannel Synthetic Aperture Radar［J］. Electronics and Communication Engineering Journal. 1999, 11(1): 29-38.

[1]	韩永赛,马时平,何林远,李承昊,朱明明,张飞. 改进YOLOv3的快速遥感机场区域目标检测[J]. 西安电子科技大学学报, 2021, 48(5): 156-166.
[2]	董如婵,焦李成,赵进,沈维燕. 一种深度融合机制的遥感图像目标检测技术[J]. 西安电子科技大学学报, 2021, 48(5): 128-138.
[3]	毛昭勇,王亦晨,王鑫,沈钧戈. 面向高速公路的车辆视频监控分析系统[J]. 西安电子科技大学学报, 2021, 48(5): 178-189.
[4]	张佳琦,陶海红,张修社,韩春雷. 一种利用量测空间聚类的多帧检测前跟踪算法[J]. 西安电子科技大学学报, 2021, 48(5): 231-238.
[5]	王平,江雨泽,赵光辉. 目标检测的多尺度定位提升算法[J]. 西安电子科技大学学报, 2021, 48(3): 85-90.
[6]	陶毅,丁丽. 利用共轭对称性的数字IQ频域校准方法[J]. 西安电子科技大学学报, 2021, 48(2): 181-189.
[7]	胡利平,闫华,钟卫军,殷红成,王超. 舰船目标三维散射中心建模及SAR快速仿真方法[J]. 西安电子科技大学学报, 2021, 48(2): 72-83.
[8]	段崇棣,韩超垒,杨志伟,张庆君. 一种杂波分类辅助的近海岸模糊杂波抑制方法[J]. 西安电子科技大学学报, 2021, 48(2): 64-71.
[9]	杨军,周芳. 分布式小卫星MIMO-SAR超高分辨成像方法[J]. 西安电子科技大学学报, 2021, 48(2): 99-108.
[10]	王昕,常贵清,池琛琛. 广角SAR各向异性散射目标分离成像[J]. 西安电子科技大学学报, 2021, 48(2): 109-116.
[11]	陆金文,闫华,殷红成,张磊,董纯柱. 用于三维散射中心SBR建模的边缘绕射修正[J]. 西安电子科技大学学报, 2021, 48(2): 117-124.
[12]	梁壮,温利武,丁金闪. 改进型SVD-FRFT海杂波抑制方法[J]. 西安电子科技大学学报, 2021, 48(2): 55-63.
[13]	汪昱东,郭继昌,王天保. 一种改进的雾天图像行人和车辆检测算法[J]. 西安电子科技大学学报, 2020, 47(4): 70-77.
[14]	张彦飞,孙文杰,孙玉梅,孟祥伟,陈祥光. 非高斯杂波中机载多进多出雷达动目标检测[J]. 西安电子科技大学学报, 2020, 47(3): 23-31.
[15]	余志超,张瑞红. 结合深度轮廓特征的改进孪生网络跟踪算法[J]. 西安电子科技大学学报, 2020, 47(3): 40-49.