一种适用于低信噪比短CPI的ISAR横向定标算法

doi:10.3969/j.issn.1001-2400.2014.06.003

Abstract

Abstract:

This paper proposes a new algorithm for solving cross-range scaling for the inverse synthetic aperture radar(ISAR) imaging during a short Coherent Processing Interval (CPI) under a low Signal Noise Ratio (SNR). Based on the sparsity characteristic of the ISAR image, a Weighted Compressive Sensing (WCS) procedure is applied to generate high-resolution images, which can encourage signal components while suppressing noise. Then on the basis of the characteristics of 2-D Fourier transform (2-D FFT) and polar mapping, the Rotation Angle Velocity (RAV) initial estimation is realized by the correlation between two polar images. Finally, the maximum correlation position is found by using WCS, improving the estimation precision and efficiency of RAV. The rescaled ISAR image can be implemented. Both simulated and real-measured data confirm the feasibility and effectiveness of the proposed algorithm.

Key words: ISAR, low SNR, short CPI, cross-range scaling, WCS

CHEN Qianqian;XING Mengdao;LI Haolin;BAO Zheng. Cross-range scaling for ISAR imaging within short CPI and low SNR[J].J4, 2014, 41(6): 12-17+64.

References

［1］ Wu L, Wei X Z, Yang D G, et al. ISAR Imaging of Targets with Complex Motion Based on Discrete Chirp Fourier Transform for Cubic Chirps ［J］. IEEE Transactions on Geoscience and Remote Sensing, 2012, 50(10): 4201-4212.
［2］杨磊, 熊涛, 张磊, 等. 应用联合自聚焦实现低信噪比ISAR成像运动补偿［J］. 西安电子科技大学学报, 2012, 39(3): 63-69.
Yang Lei, Xiong Tao, Zhang Lei, et al. Translational Motion Compensation for ISAR Imaging Based on Joint Autofocusing under the Low SNR ［J］. Journal of Xidian University, 2012, 39(3): 63-69.
［3］ Wang Y. Inverse Synthetic Aperture Radar Imaging of Maneuvering Target Based on Range-instantaneous-Doppler and Range-instantaneous-chirp-rate Algorithms ［J］. IET Radar, Sonar and Navigation, 2012, 6(9): 921-928.
［4］李飞, 纠博, 刘宏伟. 基于随机霍夫变换的干涉ISAR横向定标算法［J］. 电子与信息学报, 2013, 35(1): 49-55.
Li Fei, Jiu Bo, Liu Hongwei. A Novel Method of Cross-range Scaling Interferometric ISAR Based on Randomized Hough Transform［J］. Journal of Electronics ＆ Information Technology, 2013, 35(1): 49-55.
［5］佘志舜, 朱兆达. 逆合成孔径雷达横向距离定标［J］. 电子学报, 1997, 25(3): 45-48.
She Zheshun, Zhu Zhaoda. Cross-range Scaling of Inverse Synthetic Aperture Radar ［J］. Acta Electronica Sinica, 1997, 25(3): 45-48.
［6］ Wang Y, Jiang Y C. A Novel Algorithm for Estimating the Rotation Angle in ISAR Imaging ［J］. IEEE Geoscience and Remote Sensing Letters, 2008, 5(4): 608-609.
［7］ Martorella M. Novel Approach for ISAR Image Cross-range Scaling ［J］. IEEE Transactions on Aerospace and Electronic Systems, 2008, 44(1): 281-294.
［8］ Yeh C M, Xu J, Peng Y N, et al. Cross-range Scaling for ISAR Based on Image Rotation Correlation ［J］. IEEE Geoscience and Remote Sensing Letters, 2009, 6(3): 597-601.
［9］ Park S H, Him H T, Kim K T. Cross-range Scaling Algorithm for ISAR Images Using 2-D Fourier Transform and Polar Mapping ［J］. IEEE Transactions on Geoscience and Remote Sensing, 2011, 49(2): 868-877.
［10］ Moore T G, Zuerndorfer B W, Burt E C. Enhanced Imagery Using Spectral-estimation-based Techniques ［J］. Lincoln Laboratory Journal, 1997, 10(2):171-186.
［11］ Zhang L, Xing M D, Qiu C W, et al. Achieving to Higher Resolution ISAR Imaging with Limited Pluses via Compressed Sampling ［J］. IEEE Transactions on Geoscience and Remote Sensing, 2009, 6(3): 567-571.
［12］ Liu Y B, Song M C, Wu K, et al. High-quality 3-D InISAR Imaging of Maneuvering Target Based on a Combined Processing Approach ［J］. IEEE Geoscience and Remote Sensing Letters, 2013, 10(5): 1036-1040.
［13］ Candes E J, Romberg J, Tao T. Robust Uncertainty Principles: Exact Signal Reconstruction From Highly Incomplete Frequency Information［J］. IEEE Transactions on Information Theory, 2006, 52(2): 489-509.
［14］盛佳恋, 张磊, 邢孟道, 等. 一种利用稀疏统计特性的超分辨ISAR成像方法［J］. 西安电子科技大学学报, 2012, 39(6): 65-71.
Sheng Jialian, Zhang Lei, Xing Mengdao, et al. Super-resolution ISAR Imaging Method with Sparse Statistics ［J］. Journal of Xidian University, 2012, 39(6): 65-71.
［15］ Cande E, Wakin M, Boyd S. Enhancing Sparsity by Reweighted l₁ Minimization ［J］. Journal of Fourier Analysis and Applications Special Issue on Sparsity, 2008, 14(5): 877-905.
［16］ Grant M, Boyd S, Ye Yinyu. CVX: Matlab Software for Disciplined Convex Programming ［DB/OL］. ［2013-10-10］. http://cvxr.com/cvx/.

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Cross-range scaling for ISAR imaging within short CPI and low SNR

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