Azimuth Multichannel Reconstruction for Moving Targets in Spaceborne Squinted Multichannel Synthetic Aperture Radar

Wei XU; Zhengbin WEI; Pingping HUANG; Weixian TAN; Yaolong QI; Zhiqi GAO

doi:10.11999/JEIT200785

Volume 43 Issue 8

Aug. 2021

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Article Navigation > Journal of Electronics & Information Technology > 2021 > 43(8): 2276-2285

Wei XU, Zhengbin WEI, Pingping HUANG, Weixian TAN, Yaolong QI, Zhiqi GAO. Azimuth Multichannel Reconstruction for Moving Targets in Spaceborne Squinted Multichannel Synthetic Aperture Radar[J]. Journal of Electronics & Information Technology, 2021, 43(8): 2276-2285. doi: 10.11999/JEIT200785

Citation:

Wei XU, Zhengbin WEI, Pingping HUANG, Weixian TAN, Yaolong QI, Zhiqi GAO. Azimuth Multichannel Reconstruction for Moving Targets in Spaceborne Squinted Multichannel Synthetic Aperture Radar[J]. Journal of Electronics & Information Technology, 2021, 43(8): 2276-2285. doi: 10.11999/JEIT200785

Citation:

Wei XU, Zhengbin WEI, Pingping HUANG, Weixian TAN, Yaolong QI, Zhiqi GAO. Azimuth Multichannel Reconstruction for Moving Targets in Spaceborne Squinted Multichannel Synthetic Aperture Radar[J]. Journal of Electronics & Information Technology, 2021, 43(8): 2276-2285. doi: 10.11999/JEIT200785

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Azimuth Multichannel Reconstruction for Moving Targets in Spaceborne Squinted Multichannel Synthetic Aperture Radar

doi: 10.11999/JEIT200785

1.
College of Information Engineering, Inner Mongolia University of Technology, Hohhot 010050, China
2.
Inner Mongolia Key Laboratory of Radar Technology and Application, Hohhot 010050, China

Funds: The National Natural Science Foundation of China (62071258, 61701264, 61631011), The Natural Science Foundation of Inner Mongolia Autonomous Region (2020ZD18), The National Defense Key Laboratory Foundation of China (6142216190209)

Received Date: 2020-09-07
Rev Recd Date: 2021-01-21

Available Online: 2021-02-25

Publish Date: 2021-08-10

Abstract

Abstract

In the spaceborne azimuth multichannel SAR squinted mode, the squint angle and the velocity of moving target will cause the 2-D spectrum of echo signal to be aliased and the multichannel imbalance, respectively. Both phenomena would affect the azimuth multichannel reconstruction for moving targets. To resolve this problem, an azimuth multichannel reconstruction method for moving targets in the azimuth multichannel squinted mode is proposed. It eliminates the secondary Doppler aliasing problem caused by the squint angle through azimuth de-ramp preprocessing, and then the multichannel imbalance caused by the moving target velocity is resolved by the improved multichannel reconstruction matrix. The clutter suppression ability in the case of channel redundancy is analyzed, and the residual phase error caused by the estimated velocity error is discussed. Furthermore, an effect moving target velocity estimate approach is proposed. Finally, the simulation results on point targets validate the effectiveness of the proposed approach.
- Synthetic Aperture Radar (SAR),
- Squinted mode,
- Azimuth multichannel reconstruction,
- Moving target,
- False target suppression

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References(15)

References

[1]	CUMMING I G and WONG F H. Digital Processing of Synthetic Aperture Radar Data: Algorithms and Implementation[M]. Boston: Artech House, 2005: 2–4.
[2]	LUO Yin, ZHAO Fengjun, LI Ning, et al. A modified cartesian factorized back-projection algorithm for highly squint spotlight synthetic aperture radar imaging[J]. IEEE Geoscience and Remote Sensing Letters, 2019, 16(6): 902–906. doi: 10.1109/LGRS.2018.2885196
[3]	LIU Wenkang, SUN Guangcai, XIA Xianggen, et al. Highly squinted MEO SAR focusing based on extended omega-k algorithm and modified joint time and doppler resampling[J]. IEEE Transactions on Geoscience and Remote Sensing, 2019, 57(11): 9188–9200. doi: 10.1109/TGRS.2019.2925385
[4]	XING Mengdao, WU Yufeng, ZHANG Y D, et al. Azimuth resampling processing for highly squinted synthetic aperture radar imaging with several modes[J]. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(7): 4339–4352. doi: 10.1109/TGRS.2013.2281454
[5]	XU Wei, DENG Yunkai, HUANG Pingping, et al. Full-aperture SAR data focusing in the spaceborne squinted sliding-spotlight mode[J]. IEEE Transactions on Geoscience and Remote Sensing, 2014, 52(8): 4596–4607. doi: 10.1109/TGRS.2013.2282863
[6]	孙宁霄, 吴琼之, 孙林. 基于局部最优匹配的斜视SAR子孔径成像算法[J]. 电子与信息学报, 2017, 39(12): 2851–2859. doi: 10.11999/JEIT170466 SUN Ningxiao, WU Qiongzhi, and SUN Lin. Local optimal matching algorithm for subaperture imaging of squint synthetic aperture radar[J]. Journal of Electronics &Information Technology, 2017, 39(12): 2851–2859. doi: 10.11999/JEIT170466
[7]	HUANG Pingping, LI Shenyang, and XU Wei. Investigation on full-aperture multichannel azimuth data processing in TOPS[J]. IEEE Geoscience and Remote Sensing Letters, 2014, 11(4): 728–732. doi: 10.1109/LGRS.2013.2278183
[8]	赵庆超, 张毅, 王宇, 等. 基于多帧超分辨率的方位向多通道星载SAR非均匀采样信号重建方法[J]. 雷达学报, 2017, 6(4): 408–419. doi: 10.12000/JR17035 ZHAO Qingchao, ZHANG Yi, WANG Yu, et al. Signal reconstruction approach for multichannel SAR in azimuth based on multiframe super resolution[J]. Journal of Radars, 2017, 6(4): 408–419. doi: 10.12000/JR17035
[9]	HUANG Pingping, XU Wei, and LI Shenyang. Spaceborne squinted multichannel synthetic aperture radar data focusing[J]. IET Radar, Sonar & Navigation, 2014, 8(9): 1073–1080. doi: 10.1049/iet-rsn.2013.0332
[10]	ZHANG Shuangxi, XING Mengdao, XIA Xianggen, et al. A robust imaging algorithm for squint mode multi-channel high-resolution and wide-swath SAR with hybrid baseline and fluctuant terrain[J]. IEEE Journal of Selected Topics in Signal Processing, 2015, 9(8): 1583–1598. doi: 10.1109/JSTSP.2015.2464182
[11]	XU Wei, WEI Zhengbin, HUANG Pingping, et al. Azimuth multichannel reconstruction for moving targets in geosynchronous spaceborne–airborne bistatic SAR[J]. Remote Sensing, 2020, 12(11): 1703. doi: 10.3390/rs12111703
[12]	王玉莹, 张志敏, 李宁, 等. 高分宽幅SAR系统下的方位多通道运动目标成像算法研究[J]. 电子与信息学报, 2020, 42(3): 541–546. doi: 10.11999/JEIT190211 WANG Yuying, ZHANG Zhimin, LI Ning, et al. A moving target imaging approach for the multichannel in azimuth high resolution wide swath SAR system[J]. Journal of Electronics &Information Technology, 2020, 42(3): 541–546. doi: 10.11999/JEIT190211
[13]	TAN Weixian, XU Wei, HUANG Pingping, et al. Investigation of azimuth multichannel reconstruction for moving targets in high resolution wide swath SAR[J]. Sensors, 2017, 17(6): 1270. doi: 10.3390/s17061270
[14]	ZHANG Ying, XIONG Wei, DONG Xichao, et al. A novel azimuth spectrum reconstruction and imaging method for moving targets in geosynchronous spaceborne–airborne bistatic multichannel SAR[J]. IEEE Transactions on Geoscience and Remote Sensing, 2020, 58(8): 5976–5991. doi: 10.1109/TGRS.2020.2974531
[15]	郜参观, 邓云凯, 冯锦. 通道不平衡对偏置相位中心多波束SAR性能影响的理论分析[J]. 电子与信息学报, 2011, 33(8): 1828–1832. doi: 10.3724/SP.J.1146.2010.01257 GAO Canguan, DENG Yunkai, and FENG Jin. Theoretical analysis on the mismatch influence of displaced phase center multiple-beam SAR systems[J]. Journal of Electronics &Information Technology, 2011, 33(8): 1828–1832. doi: 10.3724/SP.J.1146.2010.01257