微小型无人机载FMCW SAR宽波束运动补偿算法

doi:10.12305/j.issn.1001-506X.2024.10.08

Abstract

Abstract:

Synthetic aperture radar (SAR) with frequency modulated continuous wave (FMCW) system has a wide azimuth beam, and the motion error will cause serious azimuth space variance in image processing. In this regard, a signal model with three-axis motion error is established, and the coupling of range and azimuth and the azimuth space variance caused by the motion error in the case of wide beam are analyzed. Then, the traditional frequency-division algorithm is introduced to compensate for the azimuth space variance in the direction of the line of sight (LOS), and the motion error in the along-track is modeled as envelope and phase error, and an "azimuth block-by-block compensation method" is proposed to eliminate the azimuth space variance of the phase error. Finally, the effectiveness of the proposed algorithm is verified by simulation experiments.

Key words: frequency modulated continuous wave (FMCW), synthetic aperture radar (SAR), azimuth space variance, micro-unmanned aerial vehicle

CLC Number:

TN957.52

Fatong ZHANG, Yaowen FU, Wei YANG, Wenpeng ZHANG, Shangqu YAN. Wide-beam motion compensation algorithm for micro-UAV FMCW SAR[J]. Systems Engineering and Electronics, 2024, 46(10): 3303-3311.

Figures/Tables 13

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References 30

1	张健丰, 付耀文, 张文鹏, 等. 圆迹合成孔径雷达成像技术综述[J]. 系统工程与电子技术, 2020, 42 (12): 2716- 2734.
	ZHANG J F , FU Y W , ZHANG W P , et al. Review of CSAR imaging techniques[J]. Systems Engineering and Electronics, 2020, 42 (12): 2716- 2734.
2	段佳, 曹兰英, 吴亿锋. 基于属性散射中心的SAR成像方法[J]. 系统工程与电子技术, 2021, 43 (10): 2782- 2788.
	DUAN J , CAO L Y , WU Y F . Imaging algorithm for SAR based on attributed scattering center models[J]. Systems Engineering and Electronics, 2021, 43 (10): 2782- 2788.
3	ZHANG F T, FU Y W, YU R F, et al. A modified fast back-projection algorithm for mini-UAV borne FMCW SAR imaging[C]//Proc. of the 2nd International Conference on Electronic Information Engineering and Computer Technology, 2022: 415-419.
4	朱岱寅, 张营, 俞翔, 等. 微型合成孔径雷达成像信号处理技术[J]. 雷达学报, 2019, 8 (6): 793- 803.
	ZHU D Y , ZHANG Y , YU X , et al. Imaging signal processing technology for miniature synthetic aperture radar[J]. Journal of Radars, 2019, 8 (6): 793- 803.
5	LUOMEI Y X, XU F. Motion compensation for multirotors mini SAR system[C]//Proc. of the IEEE International Geoscience and Remote Sensing Symposium, 2021.
6	XU W D , WANG B N , XIANG M S , et al. A novel autofocus framework for UAV SAR imagery: motion error extraction from symmetric triangular FMCW differential signal[J]. IEEE Trans.on Geoscience and Remote Sensing, 2022, 60, 5218915.
7	李悦丽, 李泽森, 王建, 等. 多旋翼无人机载SAR的视线运动误差修正与补偿[J]. 雷达学报, 2022, 11 (6): 1061- 1080.
	LI Y L , LI Z S , WANG J , et al. Modification and compensation of the line-of-sight motion error for multirotor UAV SAR[J]. Journal of Radars, 2022, 11 (6): 1061- 1080.
8	PALM S , SOMMER R , JANSSEN D , et al. Airborne circular W-band SAR for multiple aspect urban site monitoring[J]. IEEE Trans.on Geoscience & Remote Sensing, 2019, 57 (9): 6996- 7016.
9	KIM S , JEON S Y , KIM J B , et al. Multichannel W-band SAR system on a multirotor UAV platform with real-time data transmission capabilities[J]. IEEE Access, 2020, 8, 144413- 144431. doi: 10.1109/ACCESS.2020.3014700
10	ALI B , MICHAIL A , CHRISTOPHER B J . Low-cost, high-resolution, drone-borne SAR imaging[J]. IEEE Trans.on Geoscience & Remote Sensing, 2022, 60 (1): 5208811.
11	邢涛, 舒奂泽, 胡庆荣, 等. 修正的垂直航向运动补偿算法[J]. 系统工程与电子技术, 2015, 37 (12): 2751- 2757.
	XING T , SHU H Z , HU Q R , et al. Refined cross-track motion compensation algorithm[J]. Systems Engineering and Electronics, 2015, 37 (12): 2751- 2757.
12	PRATS P , CAMARA-DE-MACEDO K A , REIGBER A . Comparison of topography and aperture-dependent motion compensation algorithms for airborne SAR[J]. IEEE Geoscience and Remote Sensing Letters, 2007, 4 (3): 349- 353. doi: 10.1109/LGRS.2007.895712
13	CHEN J L , ZHANG J C , YU H W , et al. Blind NCS-based autofocus for airborne wide-beam SAR imaging[J]. IEEE Trans.on Computational Imaging, 2022, 8, 626- 638. doi: 10.1109/TCI.2022.3194745
14	黄源宝, 保铮, 周峰. 一种新的机载条带式SAR沿航向运动补偿方法[J]. 电子学报, 2005, 33 (3): 459- 462.
	HUANG Y B , BAO Z , ZHOU F . A novel method for along-track motion compensation of the airborne strip-map SAR[J]. Acta Electronica Sinica, 2005, 33 (3): 459- 462.
15	FORNADO G . Trajectory deviations in airborne SAR: analysis and compensation[J]. IEEE Trans.on Aerospace and Electronic Systems, 1999, 35 (3): 997- 1009. doi: 10.1109/7.784069
16	安道祥, 黄晓涛, 李欣, 等. 机载超宽带SAR运动补偿方法[J]. 信号处理, 2011, 27 (1): 73- 80.
	AN D X , HUANG X T , LI X , et al. Motion compensation method of airborne ultra-wideband SAR[J]. Journal of Signal Processing, 2011, 27 (1): 73- 80.
17	MENG D D , HU D H , DING C B . A new approach to airborne high resolution SAR motion compensation for large trajectory deviations[J]. Chinese Journal of Electronics, 2012, 21 (4): 764- 769.
18	黎涛, 付耀文, 张健丰, 等. 多旋翼无人机载SAR视线向运动误差补偿方法[J]. 信号处理, 2022, 38 (3): 491- 501.
	LI T , FU Y W , ZHANG J F , et al. A method of line-of-sight motion error compensation for multi-rotor UAV SAR[J]. Journal of Signal Processing, 2022, 38 (3): 491- 501.
19	DE-MACEDO K A C , SCHEIBER R . Precise topography-and aperture-dependent motion compensation for airborne SAR[J]. IEEE Geoscience and Remote Sensing Letters, 2005, 2 (2): 172- 176. doi: 10.1109/LGRS.2004.842465
20	ZHENG X S, YU W D, LI Z S. A novel algorithm for wide beam SAR motion compensation based on frequency division[C]//Proc. of the IEEE International Symposium on Geoscience and Remote Sensing, 2006: 3160-3163.
21	LI Y L , LIANG X D , DING C B , et al. Improvements to the frequency division-based subaperture algorithm for motion compensation in wide-beam SAR[J]. IEEE Geoscience and Remote Sensing Letters, 2013, 10 (5): 1219- 1223. doi: 10.1109/LGRS.2012.2236817
22	PRATS P , REIGBER A , MALLORQUI J . Topo-graphy-dependent motion compensation for repeat-pass interferometric SAR systems[J]. IEEE Geoscience and Remote Sensing Letters, 2005, 2 (2): 206- 210. doi: 10.1109/LGRS.2005.846005
23	ZHANG L , WANG G Y , QIAO Z J , et al. Azimuth motion compensation with improved subaperture algorithm for airborne SAR imaging[J]. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2016, 10 (1): 184- 193.
24	MENG Z C , ZHANG L , LI J , et al. Time-domain azimuth-variant MOCO algorithm for airborne SAR imaging[J]. IEEE Geoscience and Remote Sensing Letters, 2022, 19, 4508605.
25	贾高伟, 常文革. FMCW SAR运动补偿处理技术研究[J]. 电子学报, 2013, 41 (9): 1665- 1671.
	JIA G W , CHANG W G . Analysis of motion compensation for FMCW synthetic aperture radar[J]. Acta Electronica Sinica, 2013, 41 (9): 1665- 1671.
26	贾高伟, 常文革. 高分辨率UAV SAR的三维运动误差分离与补偿[J]. 国防科技大学学报, 2014, 36 (4): 71- 76.
	JIA G W , CHANG W G . Three dimensional motion error correction for unmanned aerial vehicle synthetic aperture radar[J]. Journal of National University of Defense Technology, 2014, 36 (4): 71- 76.
27	CHEN J L , LIANG B G , YANG D G , et al. Two-step accuracy improvement of motion compensation for airborne SAR with ultrahigh resolution and wide swath[J]. IEEE Trans.on Geoscience and Remote Sensing, 2019, 57 (9): 7148- 7160.
28	FORNARO G . Trajectory deviations in airborne SAR: analysis and compensation[J]. IEEE Trans.on Aerospace and Electronic Systems, 1999, 35 (3): 997- 1009.
29	安道祥, 黄晓涛, 周智敏. 机载超宽带SAR运动误差建模与分析[J]. 国防科技大学学报, 2011, 33 (1): 65- 71.
	AN D X , HUANG X T , ZHOU Z M . Modeling and analysis of motion errors of airborne ultra-wide band SAR[J]. Journal of National University of Defense Technology, 2011, 33 (1): 65- 71.
30	庄龙, 许道宝. 低波段大波束角SAR脉冲响应函数特性研究[J]. 现代雷达, 2019, 41 (3): 36- 41.
	ZHUANG L , XU D B . A study on impulse response function for low-frequency wide-beam SAR[J]. Modern Radar, 2019, 41 (3): 36- 41.

参数	数值
中心频率/GHz	77
信号带宽/GHz	1
脉冲重复周期/ms	0.23
飞行速度/(m/s)	15
飞行高度/m	30
俯视角/(°)	20
波束宽度/(°)	30
合成孔径长度/m	18.76
条带长度/m	12

误差类型	补偿方法	熵值
LOS	两步补偿法	7.061 5
LOS	FD及两步补偿法	6.409 9
航向	两步补偿法	7.283 3
航向	逐方位块补偿法	6.345 7

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Wide-beam motion compensation algorithm for micro-UAV FMCW SAR

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