非均匀角度样本搜索雷达的ISAR成像方法

IF 0.7 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC
Hyung-Ju Kim, K. Bae, Won-Young Song, Eunjung Yang, N. Myung
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引用次数: 0

摘要

本文提出了一种利用非均匀角度样本的二维逆合成孔径雷达成像方法。一维(1-D)雷达图像,即距离剖面,是使用给定带宽内的频率样本获得的。然后,通过使用从具有恒定间隔的多个观测角度获得的距离轮廓来获取多普勒频谱,来获得2-D ISAR图像。然而,当通过对具有不均匀角度样本的目标散射信号应用距离多普勒成像方法来获得ISAR图像时,无法获得清晰的图像。在本文中,我们提出了一种从非均匀角度样本中生成协方差矩阵的方法,并基于多信号特征(MUSIC)技术获得ISAR图像。该方法可以应用于搜索雷达的目标散射信号,该雷达可以观测到不均匀方位角的目标。我们提出了搜索雷达目标的散射信号模型,并将所提出的方法分别应用于模拟和测量数据,提供了ISAR图像。结果表明,与传统方法相比,该方法提高了图像质量,减少了计算时间。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
An ISAR Imaging Method for Search Radar Involving Nonuniform Angle Samples
This paper proposes a two-dimensional (2-D) inverse synthetic aperture radar (ISAR) imaging method with nonuniformly obtained angle samples. A one-dimensional (1-D) radar image, a range profile, is obtained using frequency samples within a given bandwidth. 2-D ISAR images are then obtained by acquiring the Doppler spectrum using range profiles obtained from multiple observation angles having a constant interval. However, when ISAR images are obtained by applying the rangeDoppler imaging method for a target scattered signal with nonuniform angle samples, a clear image cannot be obtained. In this paper, we propose a method to generate a covariance matrix from a nonuniform angle sample and obtain an ISAR image based on the multiple signal characterization (MUSIC) technique. The proposed method can be applied to the target scattering signal using a search radar, which observes target with nonuniform aspect angles. We present a scattering signal model of a target for the search radar and provide ISAR images obtained by applying the proposed method to simulated and measured data, respectively. Results reveal that the proposed method improves image quality and reduces computation time compared to the conventional method.
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来源期刊
Progress in Electromagnetics Research M
Progress in Electromagnetics Research M Materials Science-Electronic, Optical and Magnetic Materials
CiteScore
2.50
自引率
10.00%
发文量
114
期刊介绍: Progress In Electromagnetics Research (PIER) M publishes peer-reviewed original and comprehensive articles on all aspects of electromagnetic theory and applications. Especially, PIER M publishes papers on method of electromagnetics, and other topics on electromagnetic theory. It is an open access, on-line journal in 2008, and freely accessible to all readers via the Internet. Manuscripts submitted to PIER M must not have been submitted simultaneously to other journals.
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