基于局域波分解的机动目标ISAR成像

doi:10.7523/j.issn.2095-6134.2009.4.008

中国科学院大学学报 ›› 2009, Vol. 26 ›› Issue (4): 483-489.DOI: 10.7523/j.issn.2095-6134.2009.4.008

基于局域波分解的机动目标ISAR成像

张义安¹, 张冬晨², 陈卫东², 王东进²

1. 中国电子科技集团第38研究所，合肥 230061;
2. 中国科学技术大学电子工程与信息科学系，合肥 230027

收稿日期:2008-06-18 修回日期:2009-03-25 发布日期:2009-07-15

ISAR imaging of maneuvering target based on local wave decomposition

ZHANG Yi-An¹, ZHANG Dong-Chen², CHEN Wei-Dong², WANG Dong-Jin²

1. No.38 Institute, China Electronics Technology Group Gorporation, Hefei 200061, China;
2. Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei 230027, China

Received:2008-06-18 Revised:2009-03-25 Published:2009-07-15

摘要/Abstract

摘要：

在飞机一类惰性较大的目标作机动飞行时,在ISAR成像的短时间内,同一距离单元的回波可近似看成多分量线性调频信号的叠加,且调频斜率各不相同. 因此,在ISAR成像的横向压缩处理中,先利用局域波分解方法将每个距离单元的回波分解为若干个线性调频信号,然后再进行Wigner-Ville变换(WVT),获取目标的瞬时多普勒谱,进而实现目标的二维成像. 该处理方法不仅避免了WVT交叉干扰项的产生,而且在保持WVT的高时频分辨能力的同时减少了计算量,仿真结果证明了该方法的有效性.

关键词: 逆合成孔径雷达, 线性调频信号, 局域波分解

Abstract:

During the short time of the inverse synthetic aperture radar (ISAR) imaging, for inert maneuvering targets such as aircraft, the echoes of the same range cell can be considered to approximately consist of multi-component linear frequency modulated (LFM) signals with different chirp rate. For these cases, a method based on local wave decomposition and Wigner-Ville transformation is proposed, and thus 2-D imaging of the target is realized. It can not only avoid the cross-term of Wigner-Ville transformation but also decrease the computational load effectively for keeping high time-frequency resolution. Computer simulation results demonstrate the validity of the proposed algorithm.

Key words: inverse synthetic aperture radar(ISAR), linear frequency modulated(LFM) signal, local wave decomposition

中图分类号:

TN957.51

张义安, 张冬晨, 陈卫东, 王东进. 基于局域波分解的机动目标ISAR成像[J]. 中国科学院大学学报, 2009, 26(4): 483-489.

ZHANG Yi-An, ZHANG Dong-Chen, CHEN Wei-Dong, WANG Dong-Jin. ISAR imaging of maneuvering target based on local wave decomposition[J]. , 2009, 26(4): 483-489.

参考文献

[1] Chen C C, Andrews H C. Target-motion-induced radar imaging
[J]. IEEE Trans on AES, 1980, 16(1):2-14.

[2] Ausherman D A, et al. Developments in radar imaging
[J]. IEEE Trans on AES, 1984, 20(4):363-400.

[3] Bao Z, Wang G Y, Luo L. Range-instantaneous Doppler imaging in ISAR
[J]. Acta Electronica Sinica, 1998, 26(12):79-83 (in Chinese). 保铮, 王根原, 罗琳. 逆合成孔径雷达的距离-瞬时多普勒成像方法
[J]. 电子学报, 1998, 26(12):79-83.

[4] Zou H, Bao Z. An efficient algorithm for adaptive Chirplet-based signal decomposition
[J]. Acta Electronica Sinica, 2001, 29(4):515-517 (in Chinese). 邹虹, 保铮. 一种有效的基于Chirplet自适应信号分解算法
[J]. 电子学报, 2001, 29(4):515-517.

[5] Berizzi F, Dalle Mese E, Diani M, et al. High-resolution ISAR imaging of maneuvering targets by means of the range instantaneous Doppler technique: modeling and performance analysis
[J]. IEEE Trans on Imaging Processing, 2001, 10(12):1880-1890.

[6] Lu G Y, Bao Z. A new method for ISAR range-instantaneous doppler imaging //Proceedings of the Fourth International Conference on Signal Processing (ICSP 98). 1998:1481-1484.

[7] Huang N E, Shen Z, Long S R, et al. The empirical mode decomposition and the hilbert spectrum for nonlinear and non-stationary time series analysis
[J]. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 1998, 454(1971):903-995.

[8] 马孝江, 余泊, 张志新,等. 一种新的时频分析方法——局域波法
[J]. 振动工程学报, 2000, 13(增刊):24-29.

[9] Zhang H Y. A new method for analyzing nonstationary signal——local wave analysis
[J]. Journal of Electronics and Information Technology, 2003, 25(10):1327-1333 (in Chinese). 张海勇. 一种新的非平稳信号分析方法——局域波分析
[J]. 电子与信息学报, 2003, 25(10):1327-1333.

[10] Victor C Chen, Shie Qian. Joint time-frequency transform for radar range-doppler imaging
[J]. IEEE Trans on AES, 1998, 34(2):486-499.

[11] Lu G Y, Bao Z. Realization of ISAR range-instantaneous Doppler imaging of maneuvering target
[J]. Systems Engineering and Electronics, 1999,21(7):30-32 (in Chinese). 卢光跃, 保铮. 机动目标ISAR距离-瞬时多普勒成像实现方法
[J]. 系统工程与电子技术, 1999, 21(7): 30-32.

基于局域波分解的机动目标ISAR成像

ISAR imaging of maneuvering target based on local wave decomposition

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 2

编辑推荐

Metrics

本文评价

访问统计

联系我们

[1]	王艳霞, 张毅. 机载单天线SAR动目标检测与参数估计[J]. 中国科学院大学学报, 2012, (2): 227-233.
[2]	艾加秋, 齐向阳. 一种基于局部K-分布的新的SAR图像舰船检测算法[J]. 中国科学院大学学报, 2010, 27(1): 36-42.