Design and analysis of spaceborne MEMO SAR multidimensional coding waveform

被引：0
|
作者：
Zhang Q. [1 ]
Li H. [2 ]
Zhang Y. [1 ,2 ]
Ren H. [1 ]
机构：
[1] School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin
[2] Key Laboratory of Marine Environmental Monitoring and Information Processing, Harbin Institute of Technology, Ministry of Industry and Information Technology, Harbin
来源：
Harbin Gongye Daxue Xuebao/Journal of Harbin Institute of Technology | 2022年 / 54卷 / 11期
关键词：
high resolution wide swath; multidimensional waveform encoding; multiple input multiple output (MIMO); synthetic aperture radar (SAR); waveform design;
D O I：
10.11918/202111058
中图分类号：
学科分类号：
摘要：
Multiple input multiple output synthetic aperture radar (MIMO SAR) can solve the high resolution and wide swath imaging conflicts of traditional SAR. To improve the suppression capability of MIMO SAR for echo signal interference between different channels, we adopted multidimensional waveform encoding technology to design system and studied the waveform design of MIMO SAR. Two typical signals in MIMO SAR (positive and negative linear frequency modulation signal and orthogonal frequency division modulation chirp) were selected and compared with short term shift orthogonal (STSO) signals. Considering the characteristics of multiple apertures simultaneously transmitting signal and receiving echo, MIMO SAR was combined with multidimensional waveform encoding technology for echo processing. Digital beam forming technology was used to divide multiple subswaths in distance dimension to achieve large mapping band imaging. In azimuth dimension, multichannel reconstruction algorithm was adopted to restore the periodic non-uniform sampling echo to uniform sampling, so as to achieve high resolution imaging, and then the design and imaging of the new SAR transmitting signal were carried out. Experimental results show that compared with other two signals, STSO signal had the best performance in terms of peak side lobe ratio, integral side lobe ratio, and resolution, which could suppress the fuzzy energy more thoroughly. STSO signal performed well in MIMO SAR, which was similar to that in traditional SAR. Besides, STSO had better focusing performance in MIMO SAR system with good imaging indexes, which could reduce system complexity. © 2022 Harbin Institute of Technology. All rights reserved.
引用
收藏
页码：22 / 30
页数：8
相关论文
共 16 条
  • [1] PANG Bo, XING Shiqi, DAI Dahai, Et al., Development and perspective of MIMO-SAR imaging technology, Systems Engineering and Electronics, 42, 6, (2020)
  • [2] ZHANG Jiajia, ZHOU Fang, SUN Long, Et al., MIMO-SAR solution based on azimuth phase coding waveforms and digital beamforming, Proceedings of the 2016 CIE International Conference on Radar (RADAR), (2016)
  • [3] DENG Yunkai, YU Weidong, ZHANG Heng, Et al., Forthcoming spaceborne SAR development [J], Journal of Radars, 9, 1, (2020)
  • [4] MITTERMAYER J, MARTINEZ J M., Analysis of range ambiguity suppression in SAR by up and down chirp modulation for point and distributed targets [C], Proceedings of the 2003 IEEE International Geoscience and Remote Sensing Symposium, (2003)
  • [5] KRIEGER G, GEBERT N, MOREIRA A., Multidimensional waveform encoding
  • [6] a new digital beam-forming technique for synthetic aperture radar remote sensing, IEEE Transactions on Geoscience & Remote Sensing, 46, 1, (2007)
  • [7] KRIEGER G., MIMO-SAR: opportunities and pitfalls, IEEE Transactions on Geoscience & Remote Sensing, 52, 5, (2014)
  • [8] KIM J H, YOUNIS M, MOREIRA A, Et al., A novel OFDM chirp waveform scheme for use of multiple transmitters in SAR [J], IEEE Geoscience & Remote Sensing Letters, 10, 3, (2013)
  • [9] WANG Jie, LIANG Xingdong, CHEN Longyong, MIMO SAR system using digital implemented OFDM waveforms, Proceedings of the 2012 IEEE International Geoscience and Remote Sensing Symposium, (2013)
  • [10] CHENG Pu, WANG Zhan, XIN Qin, Et al., Imaging of FMCW MIMO radar with interleaved OFDM waveform [C], Proceedings of the 12th International Conference on Signal Processing, (2014)
12