基于局部最优匹配的斜视SAR子孔径成像算法

孙宁霄; 吴琼之; 孙林

doi:10.11999/JEIT170466

基于局部最优匹配的斜视SAR子孔径成像算法

doi: 10.11999/JEIT170466

计量
- 文章访问数: 893
- HTML全文浏览量: 158
- PDF下载量: 183
- 被引次数: 0
出版历程
- 收稿日期: 2017-05-16
- 修回日期: 2017-10-07
- 刊出日期: 2017-12-19

Local Optimal Matching Algorithm for Subaperture Imaging of Squint Synthetic Aperture Radar

(School of Optoelectronics, Beijing Institute of Technology, Beijing 100081, China)

摘要

摘要: 斜视合成孔径雷达(Synthetic Aperture Radar, SAR)能够对雷达平台的侧前或侧后方区域进行观测，极大地增加了雷达的探测范围和灵活性。针对斜视SAR子孔径成像，该文提出一种基于局部最优匹配准则的成像算法。该算法在针对某方位频率构造对应的距离徙动校正、2次距离压缩以及方位补偿函数时，以位于该方位频率处的点目标得到最佳匹配为准则，不同于传统方法的以方位中心点获得最佳匹配为准则，从而能够避免距离方位中心较远的目标的失配，有效地改善了方位边缘区域的聚焦效果。文中通过点目标仿真验证了该算法的有效性。
- 斜视合成孔径雷达 /
- 子孔径成像 /
- 局部最优匹配准则
Abstract: Squint Synthetic Aperture Radar (SAR) can observe the side-front or side-rear scene of the platform. The squint mode improves the observation area and flexibility of SAR greatly. For subaperture imaging of squint SAR, a Local Optimal Matching Algorithm (LOMA) is proposed in this paper. In the algorithm, a new criterion is used in the presentation of the functions for range cell migration correction, secondary range compression and compensation in azimuth frequency domain. The criterion is that the target located at the azimuth frequency is matched optimally. It is different from the traditional algorithm, whose criterion is that the target at the azimuth center is matched optimally. Based on the new criterion, the proposed algorithm is able to avoid the mismatching and improve the focusing of the targets far from the azimuth center. The validity of the proposed algorithm is illustrated by the simulation results.
- Synthetic Aperture Radar (SAR) /
- Subaperture imaging /
- Local Optimal Matching Criterion (LOMC)

HTML全文

参考文献(24)

CURLANDER C John and MCDONOUGH N Robert. Synthetic Aperture Radar Systems and Signal Processing[M]. New York: John Wiley Sons, 1991, Chapter 1.

张澄波. 综合孔径雷达原理、系统分析与应用[M]. 北京: 科学出版社, 1989, 第1章.

董祺, 杨泽民, 李震宇, 等. 基于方位空变斜距模型的大斜视机动平台波数域SAR成像算法[J]. 电子与信息学报, 2016, 38(12): 3166-3173. doi: 10.11999/JEIT160785.

DONG Qi, YANG Zemin, LI Zhenyu, et al. Wavenumber- domain imaging algorithm for high squint SAR based on azimuth variation range model [J]. Journal of Electronics Information Technology, 2016, 38(12): 3166-3173. doi: 10.11999/JEIT160785.

聂鑫. 变波门大斜视滑动聚束SAR成像关键技术分析[J]. 电子与信息学报, 2016, 38(12): 3122-3128. doi: 10.11999/JEIT 160812.

NIE Xin. Research on key technique of highly squinted sliding spotlight SAR imaging with varied receiving range bin[J]. Journal of Electronics Information Technology, 2016, 38(12): 3122-3128. doi: 10.11999/JEIT160812.

董祺, 邢孟道, 李震宇, 等. 一种基于坐标轴旋转的俯冲段大斜视SAR波数域成像算法[J]. 电子与信息学报, 2016, 38(12): 3137-3143. doi: 10.11999/JEIT160784.

DONG Qi, XING Mengdao, LI Zhenyu, et al. Wavenumber- domain imaging algorithm for high squint diving SAR based on axes rotation[J]. Journal of Electronics Information Technology, 2016, 38(12): 3137-3143. doi: 10.11999/JEIT 160784.

WONG H Frank and YEO Soon tat. New applications of nonlinear chirp scaling in SAR data processing[J]. IEEE Transactions on Geoscience and Remote Sensing, 2001, 39(5): 946-953. doi: 10.1109/36.921412.

SUN Guangcai, JIANG Xiuwei, XING Mengdao, et al. Focus improvement of highly squinted data based on azimuth nonlinear scaling[J]. IEEE Transactions on Geoscience and Remote Sensing, 2011, 49(6): 2308-2322. doi: 10.1109/TGRS. 2010.2102040.

AN Daoxiang, HUANG Xiaotao, JIN Tian, et al. Extended nonlinear chirp scaling algorithm for high-resolution highly squint SAR data focusing[J]. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50(9): 3595-3609. doi: 10.1109/TGRS.2012.2183606.

刘高高, 张林让, 刘昕, 等. 一种曲线轨迹下的大场景前斜视成像算法[J]. 电子与信息学报, 2011, 33(3): 628-633. doi: 10.3724/SP.J.1146.2010.00575.

LIU Gaogao, ZHANG Linrang, LIU Xin, et al. Missile-borne large region squint SAR algorithm based on a curve trajectory[J]. Journal of Electronics Information Technology, 2011, 33(3): 628-633. doi: 10.3724/SP.J.1146. 2010.00575.

CUMMING G Ian and WONG H Frank. Digital Processing of Synthetic Aperture Radar Data[M]. Norwood MA: Artech House Inc., 2005, Chapter 9.

SACK M, ITO M R, and CUMMING I G Application of efficient linear FM matched filtering algorithms to synthetic aperture radar processing[J]. IEE Proceedings F (Communications, Radar and Signal Processing), 1985, 132(1): 45-57. doi: 10.1049/ip-f-1:19850006.

MOREIRA Alberto, MITTERMAYER Josef, and SCHEIBER Rolf. Extended chirp scaling algorithm for air-and spaceborne SAR data processing in stripmap and ScanSAR imaging modes[J]. IEEE Transactions on Geoscience and Remote Sensing, 1996, 34(5): 1123-1136. doi: 10.1109/36.536528.

李震宇, 梁毅, 邢孟道, 等. 弹载合成孔径雷达大斜视子孔径频域相位滤波成像算法[J]. 电子与信息学报, 2015, 37(4): 953-960. doi: 10.11999/JEIT140618.

LI Zhenyu, LIANG Yi, XING Mengdao, et al. A frequency phase filtering imaging algorithm for highly squint missile-borne synthetic aperture radar with subaperture[J]. Journal of Electronics Information Technology, 2015, 37(4): 953-960. doi: 10.11999/JEIT140618.

李震宇, 梁毅, 邢孟道, 等. 一种俯冲段子孔径SAR 大斜视成像及几何校正方法[J]. 电子与信息学报, 2015, 37(8): 1814-1820. doi: 10.11999/JEIT141516.

LI Zhenyu, LIANG Yi, XING Mengdao, et al. New subaperture imaging algorithm and geometric correction method for high squint diving SAR based on equivalent squint model[J]. Journal of Electronics Information Technology, 2015, 37(8): 1814-1820. doi: 10.11999/JEIT 141516.

ZENG Tao, LI Yinghe, DING Zegang, et al. Subaperture approach based on azimuth-dependent range cell migration correction and azimuth focusing parameter equalization for maneuvering high-squint-mode SAR[J]. IEEE Transactions on Geoscience and Remote Sensing, 2015, 53(12): 6718-6734. doi: 10.1109/TGRS.2015.2447393.

怀园园, 梁毅, 李震宇, 等. 一种基于方位谱重采样的大斜视子孔径SAR成像改进Omega-K算法[J]. 电子与信息学报, 2015, 37(7): 1744-1750. doi: 10.11999/JEIT141383.

HUAI Yuanyuan, LIANG Yi, LI Zhenyu, et al. Modified Omega-K algorithm for sub-aperture high squint SAR imaging based on azimuth resampling[J]. Journal of Electronics Information Technology, 2015, 37(7): 1744-1750. doi: 10.11999/JEIT141383.

LONG Teng, LI Yinghe, and DING Zegang. Interpolation method for geometric correction in highly squint synthetic aperture radar[J]. IET Radar, Sonar Navigation, 2012, 6(7): 620-626. doi: 10.1049/iet-rsn.2011.0313.

施引文献

资源附件(0)

访问统计