NDLI: A Doppler parameter estimation method based on mismatched compression

Content Provider	IEEE Xplore Digital Library
Author	Zhongyu Li Junjie Wu Yulin Huang Zhichao Sun Jianyu Yang Xiaobo Yang
Copyright Year	2015
Description	Author affiliation: Univ. of Electron. Sci. & Technol. of China, Chengdu, China (Zhongyu Li; Junjie Wu; Yulin Huang; Zhichao Sun; Jianyu Yang; Xiaobo Yang)
Abstract	The ground moving target (GMT) model has been widely employed in modern coherent radar systems, such as the synthetic aperture radar (SAR) and the bistatic SAR (BiSAR). For the coherent radar systems, GMT imaging necessitates the compensation of the additional azimuth modulation without a priori knowledge of the GMT's motion parameters. That is to say, it is necessary to estimate the Doppler parameters of the GMT before the azimuth compression processing. For conventional estimation methods, such as the map drift (MD) method and the phase gradient auto-focus (PGA) method, a searching procedure is necessary and leads to an expensive computational cost. In this paper, a Doppler parameter estimation method based on mismatched compression is proposed. One advantage of this method is that it doesn't need the searching procedure. In addition, another advantage of this method is that both the Doppler centroid and the Doppler frequency rate of the GMT can be simultaneously estimated according to the relationships among the Doppler parameters, the positional offset and the boarding width of the mismatched imaging result. The theoretical analysis and numerical simulations validate that the proposed method works well with different signal to noise ratio.
Starting Page	4468
Ending Page	4471
File Size	272238
Page Count	4
File Format	PDF
e-ISBN	9781479979295
DOI	10.1109/IGARSS.2015.7326819
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-07-26
Publisher Place	Italy
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Doppler effect Azimuth Radar imaging Synthetic aperture radar Imaging Doppler radar Doppler frequency rate ground moving target synthetic aperture radar Bistatic SAR mismatched compression Doppler centroid
Content Type	Text
Resource Type	Article

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