解线频调步进频率ISAR成像研究

doi:10.3969/j.issn.1001-2400.2010.03.015

J4 ›› 2010, Vol. 37 ›› Issue (3): 469-475+519.doi: 10.3969/j.issn.1001-2400.2010.03.015

解线频调步进频率ISAR成像研究

刘亚波;李军;李亚超;邢孟道

(西安电子科技大学雷达信号处理重点实验室，陕西西安 710071)

收稿日期:2009-11-03 出版日期:2010-06-20 发布日期:2010-07-23
通讯作者: 刘亚波
作者简介:刘亚波(1984-)，男，西安电子科技大学博士研究生，E-mail: liuyabo9333@163.com．
基金资助:
重点实验室基金资助项目(9140C0102100902); 博士点基金资助项目(20090203120013);西安电子科技大学基本科研业务费资助项目(空时稀缺ISAR成像方法研究)

Study on dechirp SF ISAR imaging

LIU Ya-bo;LI Jun;LI Ya-chao;XING Meng-dao

(Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an 710071， China)

Received:2009-11-03 Online:2010-06-20 Published:2010-07-23
Contact: LIU Ya-bo

摘要/Abstract

摘要：

提出一种采用两次相干化处理实现对解线频调步进频率的逆合成孔径雷达(ISAR)成像算法．首先对回波进行相干化预处理，以估计运动目标的参数，并对相干化后的回波进行补偿;之后，采用相位相干化技术对残留相位误差进行校正，并利用时域带宽拼接技术获得目标的高分辨一维距离像．最后利用传统方位成像算法获得目标的高分辨ISAR图像．仿真数据验证了该方法的有效性．

关键词: 逆合成孔径雷达(ISAR), 线性调频步进雷达, 解线频调处理, 相干化处理

Abstract:

A new high-resolution ISAR imaging method including two coherency processing steps is presented for the linearly stepped-frequency (SF) modulated radar using the dechirp technique. First, the coherency preprocessing is applied to the echoes to estimate the target radial velocity and acceleration rate, and then these motion parameters are compensated. Second, a band coherence technique is used to adjust the residual phase error, and a high resolution range profile can be obtained by means of a time-domain band append technique. Finally, a well-focused ISAR image is obtained via the conventional ISAR imaging algorithm. Simulation results verify the effectiveness of the proposed method.

Key words: inverse synthetic aperture radar (ISAR), linearly stepped-frequency (SF) modulated radar, dechirp technique, coherence processing

刘亚波;李军;李亚超;邢孟道. 解线频调步进频率ISAR成像研究[J]. J4, 2010, 37(3): 469-475+519.

LIU Ya-bo;LI Jun;LI Ya-chao;XING Meng-dao. Study on dechirp SF ISAR imaging[J]. J4, 2010, 37(3): 469-475+519.

参考文献

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解线频调步进频率ISAR成像研究

Study on dechirp SF ISAR imaging

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