机载三通道SAR/GMTI快速目标运动参数估计

doi:10.3969/j.issn.1001-2400.2010.02.010

J4 ›› 2010, Vol. 37 ›› Issue (2): 235-241.doi: 10.3969/j.issn.1001-2400.2010.02.010

• Original Articles • Previous Articles Next Articles

Parameter estimation of the fast moving target based on tri-channel airborne SAR-GMTI

QIAN Jiang¹;Lü Xiao-lei¹;XING Meng-dao¹;LI Liang-hai²;ZHANG Zhen-hua²

(1. Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an 710071， China;
2. The No. 704 Inst. of the China Aerospace Science and Tech. Group, Beijing 100076， China)

Received:2008-12-11 Online:2010-04-20 Published:2010-06-03
Contact: QIAN Jiang E-mail:7anjiang@gmail.com

Abstract

Abstract:

In a conventional SAR/GMTI system, it is hard to obtain the information on the fast moving target. An approach for fast moving target indication and motion parameter estimation is proposed based on PRF ambiguity resolving. In the range frequency and compressed azimuth time domain of Tri-channel SAR/GMTI data, the clutter is cancelled by the mutual channel, and the PRF ambiguity number can be estimated from the remaining signals. This approach utilizes the relation between the line slope and the ambiguity number of the fast moving target in the domain to get the ambiguity number and thus the slope of the line through Radon transform. Azimuth focusing under the criterion of entry-minimization is implemented following effectiveness azimuth migration compensation, and the fast moving target is imaged after range match filtering. The results of simulation and real data processing show the effectiveness of the approach.

Key words: SAR/GMTI, fast moving target, PRF ambiguity, radon transform

QIAN Jiang;Lü Xiao-lei;XING Meng-dao;LI Liang-hai;ZHANG Zhen-hua. Parameter estimation of the fast moving target based on tri-channel airborne SAR-GMTI[J].J4, 2010, 37(2): 235-241.

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Parameter estimation of the fast moving target based on tri-channel airborne SAR-GMTI

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