机载单天线SAR动目标检测与参数估计
收稿日期: 2011-02-11
修回日期: 2011-04-06
网络出版日期: 2012-03-15
基金资助
国家863计划项目(2009AA7050613)资助
Moving target indication and parameter estimation based on single-channel aeroborne SAR
Received date: 2011-02-11
Revised date: 2011-04-06
Online published: 2012-03-15
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 . DOI: 10.7523/j.issn.2095-6134.2012.2.012
We have studied the low precision of parameter estimation for the moving target in airborne single antenna SAR/GMTI mode. Firstly, the Doppler shift parameter and range walk parameter are used to estimate the radical velocity of the moving target, and the range walk parameter is corrected with the estimation results. Secondly, the improved reflectivity displacement method algorithm is used to estimate the Doppler frequency rate, and the azimuth velocity can be calculated when there is no acceleration. Thus, parameter estimation and focusing imaging can be completed at the same time. Simulation results show the effectiveness of the proposed method.
Key words： single-channel SAR; moving targets detection; MTI filter; range migration; RDM
[1] 吴顺君, 梅晓春. 雷达信号处理和数据处理技术[M]. 北京: 电子工业出版社, 2008.
[2] Raney R K. Synthetic aperture imaging radar and moving targets[J]. IEEE Transactions on AES, 1971, 7(3): 499-505.
[3] Freeman A, Currie A. Synthetic aperture radar images of moving targets[J]. GEC Journal of Research, 1987, 5(2):106-115.
[4] Moreira J R, Keydel W. A new MTI-SAR approach using the reflectivity displacement method[J]. IEEE Transactions on GRS, 1995, 33(5): 1238-1244.
[5] He Y X, Zhu M H, Wang Y F, et al. The parameter choice of RDM in MTI-SAR[J]. Journal of Electronics and Information Technology, 2001, 23(7): 631-636(in Chinese). 何映霞,朱敏慧,王岩飞,等. RD算法应用于SAR动目标检测时参数选择原则[J]. 电子与信息学报, 2001, 23(7): 631-636.
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