Forward-looking Multi-channel Synthetic Aperture Radar Imaging and Array Attitude Error Compensation

被引：0
|
作者：
Wang X. [1 ]
Lu J. [2 ]
Meng Z. [1 ]
Zhang L. [1 ]
机构：
[1] School of Electronics and Communication Engineering, Shenzhen Campus of Sun Yat-sen University, Shenzhen
[2] School of Computer Science and Technology, Xidian University, Xi’an
来源：
Journal of Radars | 2023年 / 12卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Array attitude error; Azimuth resolution; Doppler ambiguity resolving; FLMC-SAR; Forward-looking imaging;
D O I：
10.12000/JR23073
中图分类号：
TN95 [雷达];
学科分类号：
080904 ; 0810 ; 081001 ; 081002 ; 081105 ; 0825 ;
摘要：
To solve the problem of left-right Doppler ambiguity in forward-looking Synthetic Aperture Radar (SAR) imaging, Forward-Looking Multi-Channel SAR (FLMC-SAR) can achieve Doppler ambiguity resolving imaging through beamforming. However, array deviation angle and time-varying platform attitude errors lead to the mismatch between the space and time characteristics of a target, which affects the Doppler ambiguity resolving imaging performance. This study proposes an FLMC-SAR imaging and array attitude error compensation method. First, the three-dimensional FLMC-SAR array deviation-angle error and time-varying platform attitude error models are established. The mechanism of matching the spatiotemporal characteristics of targets in the two-dimensional spatiotemporal spectrum plane is analyzed. In addition, a representation model is established to study the spatiotemporal characteristics mismatch caused by the array attitude error in the spatiotemporal plane. Thereafter, based on the non-left-right spatial variation of the error, we propose a method of adding an error compensation phase to the back projection function to uniformly compensate the array attitude error of left-right symmetric targets. The results of simulation experiments show that the proposed method can achieve FLMC-SAR array attitude correction and error compensation, enhance the performance of forward-looking Doppler ambiguity suppression, and ensure the azimuth resolution performance of forward-looking imaging. ©The Author(s) 2023.
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收藏
页码：1155 / 1165
页数：10
相关论文
共 14 条
  • [1] KRIEGER G, MITTERMAYER J, BUCKREUSS S, Et al., Sector imaging radar for enhanced vision[J], Aerospace Science and Technology, 7, 2, pp. 147-158, (2003)
  • [2] SONG Xuan, LI Yachao, ZHANG Tinghao, Et al., Focusing high-maneuverability bistatic forward-looking SAR using extended azimuth nonlinear chirp scaling algorithm, IEEE Transactions on Geoscience and Remote Sensing, 60, (2022)
  • [3] Ruizhi HU, RAO B S M R, MURTADA A, Et al., Automotive squint-forward-looking SAR: High resolution and early warning[J], IEEE Journal of Selected Topics in Signal Processing, 15, 4, pp. 904-912, (2021)
  • [4] SHAHREZAEI I H, KIM H C., A monostatic forward-looking staring spotlight SAR raw data generation and hybrid-domain image formation modifications based on extended azimuth nonlinear chirp scaling autofocusing[J], IEEE Transactions on Aerospace and Electronic Systems, 59, 3, pp. 2329-2358, (2023)
  • [5] LU Jingyue, ZHANG Lei, WANG Guanyong, Ambiguity resolving and imaging algorithm for multichannel forward-looking synthetic aperture radar[J], Journal of Electronics & Information Technology, 40, 12, pp. 2820-2825, (2018)
  • [6] LI Han, SUO Zhiyong, ZHENG Chengxin, Et al., Study on airborne near-nadir TOPS SAR imaging with attitude angle error, IEEE Transactions on Geoscience and Remote Sensing, 60, (2022)
  • [7] LU Jingyue, ZHANG Lei, HUANG Yan, Et al., High-resolution forward-looking multichannel SAR imagery with array deviation angle calibration[J], IEEE Transactions on Geoscience and Remote Sensing, 58, 10, pp. 6914-6928, (2020)
  • [8] KLARE J, WEISS M, PETERS O, Et al., ARTINO: A new high resolution 3D imaging radar system on an autonomous airborne platform[C], 2006 IEEE International Symposium on Geoscience and Remote Sensing, pp. 3842-3845, (2006)
  • [9] YANG Zemin, SUN Guangcai, XING Mengdao, Et al., Motion compensation for airborne 3-D SAR based on joint multi-channel auto-focusing technology[J], Journal of Electronics & Information Technology, 34, 7, pp. 1581-1588, (2012)
  • [10] DING Zhenyu, TAN Weixian, WANG Yanping, Et al., Yaw angle error compensation for airborne 3-D SAR based on wavenumber-domain subblock[J], Journal of Radars, 4, 4, pp. 467-473, (2015)
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