一种空间域支撑区融合的改进Omega-K算法

doi:10.3969/j.issn.1001-2400.2017.05.008

Abstract

Abstract:

It is hard for the conventional Omega-K algorithm to implement the coherent addition of the sub-aperture image to realize the full-aperture resolution. A distance domain data support region (DSR) fusion approach based on the modified Omega-K algorithm is proposed in this paper. By the implementation of the modified sub-aperture wavenumber domain algorithm, the range-azimuth coupling is solved. At the same time, the burden of the zeros padding processing introduced by the short distance DSR of the sub-aperture data is greatly mitigated. Then the coherence processing and distance domain data support region fusion are performed. By adding the sub-aperture data coherently, the full-aperture resolution in azimuth is realized.

Key words: synthetic aperture radar(SAR), modified Omega-K algorithm, coherent addition, sub-aperture

HUAI Yuanyuan;LIANG Yi;GAO Yuexin;XING Mengdao. Distance domain data support region fusion approach for modified Omega-K algorithm[J].Journal of Xidian University, 2017, 44(5): 46-50+86.

References

［1］ YEO T S, TAN N L, ZHANG C B, et al. A New Subaperture Approach to High Squint SAR Processing［J］. IEEE Transactions on Geoscience and Remote Sensing, 2001, 39(5): 954-968.
［2］李震宇, 杨军, 梁毅, 等. 弹载SAR子孔径大斜视成像方位空变校正新方法［J］. 西安电子科技大学学报, 2015, 42(4): 99-105.
LI Zhenyu, YANG Jun, LIANG Yi, et al. New Method for Azimuth-dependent Correction of the Highly Squintedmissile-borne SAR Subaperture Imaging［J］. Journal of Xidian University, 2015, 42(4): 99-105.
［3］ LI Z Y, LIANG Y, XING M D, et al. Focusing of Highly Squinted SAR Data with Frequency Nonlinear Chirp Scaling［J］. IEEE Geoscience and Remote Sensing Letters, 2016, 13(1): 23–27.
［4］ LI Z, WANG J, LIU Q H. Interpolation-free Stolt Mapping for SAR Imaging［J］. IEEE Geoscience and Remote Sensing Letters, 2014, 11(5): 926-930.
［5］保铮, 邢孟道, 王彤. 雷达成像技术［M］. 北京: 电子工业出版社, 2010: 173-177.
［6］ XIONG T, XING M D, XIA X G, et al. New Applications of Omega-K Algorithm for SAR Data Processing Using Effective Wavelength at High Squint［J］. IEEE Transactions on Geoscience and Remote Sensing, 2013, 51(5): 3156-3169.
［7］ BAMLER R. A Comparison of Range-Doppler and Wavenumber Domain SAR Focusing Algorithms［J］. IEEE Transactions on Geoscience and Remote Sensing, 1992, 30(4): 706-713.
［8］杨军, 孙光才, 吴玉峰, 等. 基于方位谱分析的斜视TOPS SAR子孔径成像方法［J］. 电子与信息学报, 2014, 36(4): 923-930.
YANG Jun, SUN Guangcai, WU Yufeng, et al. A Subaperture Imaging Algorithm for Squint TOPS SAR Based on SPECAN Technique［J］. Journal of Electronics & Information Technology, 2014, 36(4): 923-930.
［9］ REIGBER A, ALIVIZATOS E, POTSIS A, et al. Extended Wavenumber-domain Synthetic Aperture Radar Focusing with Integrated Motion Compensation［J］. IEE Proceedings: Radar, Sonar and Navigation, 2006, 153(3): 301-310.
［10］ ZHANG L, SHENG J L, XING M D, et al. Wavenumber-domain Autofocusing for Highly Squinted UAV SAR Imagery［J］. IEEE Sensors Journal, 2012, 12(5): 1574-1588.
［11］ XU G, XING M D, ZHANG L, et al. Robust Autofocusing Approach for Highly Squinted SAR Imagery Using the Extended Wavenumber Algorithm［J］. IEEE Transactions on Geoscience and Remote Sensing, 2013, 51(10): 5031-5046.
［12］怀园园, 梁毅, 李震宇, 等. 一种基于方位谱重采样的大斜视子孔径SAR成像改进Omega-K算法［J］. 电子与信息学报, 2015, 37(7): 1743-1750.
HUAI Yuanyuan, LIANG Yi, LI Zhenyu, et al. Modified Omega-K Algorithm for Sub-aperture High Squint SAR Imaging Based on Azimuth Resampling［J］. Journal of Electronics & Information Technology, 2015, 37(7): 1743-1750.

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Distance domain data support region fusion approach for modified Omega-K algorithm

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