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

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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 E-mail:liuyabo9333@163.com

Abstract

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

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.

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Study on dechirp SF ISAR imaging

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