同航线双基调频连续波SAR改进距离徙动算法

doi:10.3969/j.issn.1001-2400.2011.01.012

Abstract

Abstract:

Considering the long sweep period of the Frequency Modulated Continuous Wave (FMCW) SAR, it becomes difficult to maintain the linearity of frequency. For lack of the satisfactory correction methods, a modified frequency non-linearity correction algorithm is presented. Furthermore, the Doppler frequency shift introduced by the platform's continuous motion is analyzed in detail. For the signals after frequency non-linearity correction, the concept of instantaneous frequency is used by introducing the parameter, i.e., bistatic angle, to deduce the signal analytical expression in the two dimensional wave-number domain. Based on this, a modified Range Migration Algorithm(RMA) with frequency non-linearity correction is proposed which is aimed at the Tandem Bistatic FMCW SAR. Simulation data processing verifies the correctness of the analysis and the effectiveness of the algorithms, including frequency non linearity correction and imaging processing.

Key words: frequency modulated continuous wave, tandem bistatic SAR, frequency non linearity correction, Doppler frequency shift, instantaneous frequency, modified range migration algorithm

CLC Number:

TN957.52

LIANG Yi;WANG Hongxian;XING Mengdao;BAO Zheng. Modified RMA for the tandem bistatic FMCW SAR with frequency non-linearity correction[J].J4, 2011, 38(1): 71-79+84.

References

[1] Meta A, Hoogeboom P, Ligthart L P. Signal Processing for FMCW SAR [J]. IEEE Trans on Geoscience and Remote Sensing, 2007, 45(11): 3519-3532.
[2] Edrich M. Ultra-lightweight Synthetic Aperture Radar Based on a 35 GHz FMCW Sensor Concept and Online Raw Data Transmission [J]. IEE Proc, Radar Sonar Navig, 2006, 153 (2): 129-134.
[3] Edrich M, Weiss G. Second-generation Ka-Band UAV SAR System [EB/OL]. [2009-11-02]. http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=4760906.
[4] 曲长文, 王颖, 苏峰, 等. LFMCW SAR非线性校正成像方法研究[J]. 中国电子科学研究院学报, 2009, 4(1): 50-53.
Qu Changwen, Wang Ying, Su Feng, et al. Research on Nonlinearity Correction Imaging Method of LFMCW SAR [J]. Journal of CAEIT, 2009, 4(1): 50-53.
[5] 丁金闪, Loffeld O, Nies H, 等. 双基SAR成像的点目标解析频谱研究[J]. 电子与信息学报, 2009, 31(4): 763-767.
Ding Jinshan, Loffeld O, Nies H, et al. Study of Point Target Spectrum for Bistatic SAR Imaging [J]. Journal of Electronics Information Technology, 2009, 31(4): 763-767.
[6] Meta A, Hoogeboom P, Ligthart L P. Range Non-linearities Correction in FMCW SAR [C]//IEEE Int Conference on Geoscience and Remote Sensing Symposium. Denver: IEEE, 2006: 403-406.
[7] de Wit J J M, Meta A, Hoogeboom P. Modified Range-Doppler Processing for FM-CW Synthetic Aperture Radar [J]. IEEE Geoscience and Remote Sensing Letters, 2006, 3(1): 83-87.
[8] 梁毅, 高昭昭, 邢孟道, 等. 调频连续波(FMCW)聚束式SAR成像研究[J]. 西安电子科技大学学报, 2009, 36(6): 972-978.
Liang Yi, Gao Zhaozhao, Xing Mengdao, et al. Imaging Study of Spotlight SAR Using FMCW [J]. Journal of Xidian University, 2009, 36(6): 972-978.
[9] Zhang Zhenhua, Xing Mengdao, Ding Jinshan, et al. Focusing Parallel Bistatic SAR Data Using the Analytic Transfer Function in the Wavenumber Domain [J]. IEEE Trans on Geoscience and Remote Sensing, 2007, 45(11): 3633-3645.
[10] 张振华, 保铮, 邢孟道, 等. 同航线双基合成孔径雷达成像的频域分析[J]. 自然科学进展, 2007, 17(6): 809-816.
Zhang Zhenhua, Bao Zheng, Xing Mengdao, et al. Frequency Domain Analysis of Tandem Bistatic SAR Imaging [J]. Progress in Natural Science, 2007, 17(6): 809-816.

Modified RMA for the tandem bistatic FMCW SAR with frequency non-linearity correction

PDF (PC)

Like

Knowledge

Cited

Abstract

Cite this article

share this article

References

Related Articles 5

Metrics

Comments

Recommended 10

[1]	SU Xiaofan,XIAO Rui,ZHU Mingzhe. Method for IF estimation of multicomponent FM signals [J]. Journal of Xidian University, 2019, 46(1): 51-56.
[2]	YANG Jun;LI Zhenyu;SUN Guangcai;XING Mengdao;ZHOU Feng. Novel full aperture imaging algorithm for highly squinted TOPS SAR [J]. J4, 2015, 42(1): 42-48+55.
[3]	LI Dong;LIAO Guisheng;YANG Zhiwei;XU Qing. Frequency scaling algorithm for high squint FMCW-SAR imaging [J]. J4, 2013, 40(4): 21-28.
[4]	WANG Hai;FAN Wenjing;ZHANG Shengfeng. Instantaneous frequency measurement method for the broadband non-stationary signal [J]. J4, 2011, 38(6): 55-61.
[5]	HOU Zhi;MIAO Chen;ZHANG Jindong;WU Wen. Moving target detection and processing method of LFMCW radar under complex background [J]. J4, 2011, 38(4): 167-172.