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首页> 外文会议>Conference on Independent Component Analyses, Wavelets, and Neural Networks Apr 22-25, 2003 Orlando, Florida, USA >ISAR Image Distortion due to Small Perturbed Motion and Restoration of Distorted Images by Time-Frequency Analysis
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ISAR Image Distortion due to Small Perturbed Motion and Restoration of Distorted Images by Time-Frequency Analysis

机译：小运动引起的ISAR图像失真和时频分析恢复失真图像

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摘要

Gross distortion on ISAR images due to small perturbed target motion is experimentally verified. Quantitative results obtained under controlled experimental conditions on the target's motion have confirmed that large distortion in the ISAR image of the target can occur. The distortion is a consequence of the phase modulation effect in the radar return signal, as a result of small fluctuating perturbed motion of the target. This gives rise to distortion of the image in the cross-range direction. The distortion can be refocused by applying time-frequency analysis. The Short-Time Fourier transform is used in this paper to examine some of the issues in refocusing distorted ISAR images.
机译：通过实验验证了由于目标运动较小而导致的ISAR图像总体失真。在目标实验的受控实验条件下获得的定量结果证实，目标的ISAR图像中可能会发生较大的畸变。失真是雷达返回信号中的相位调制效应的结果，这是目标的小幅度波动扰动运动的结果。这引起图像在跨范围方向上的失真。可以通过应用时频分析来重新聚焦失真。本文使用短时傅立叶变换来研究重新聚焦失真的ISAR图像时的一些问题。

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