非线性调频机载SAR的脉冲内多普勒效应及实验结果

Wei Wang, Robert Wang, Y. Deng, Weidong Yu, Zhimin Zhang, Pei Wang
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引用次数: 0

摘要

非线性调频(NLFM)波形是近年来研究的热点。该波形的主要优点是分辨率好,信噪比好,抗干扰能力强。然而,在合成孔径雷达(SAR)中,非线性调频至今还没有实际应用。众所周知,多普勒不容忍是NLFM波形的缺点。为此,本文建立了具有多普勒频移的二维NLFM SAR信号模型,并详细分析了多普勒频移对机载SAR成像的影响。最后,给出了机载NLFM SAR的首个实验结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Intra-pulse Doppler effect and experimental result on nonlinear frequency modulation airborne SAR
Nonlinear frequency modulation (NLFM) waveforms have been investigated in recent years. The main advantages of the waveform include fine resolution, good signal-to-noise ratio, and good interference mitigation. However, for synthetic aperture radar (SAR), there are hitherto no real applications of NLFM. It is known that Doppler intolerance is the drawback of NLFM waveform. Therefore, in this paper, the two-dimensional NLFM SAR signal model with Doppler shift is formulated and the influences of Doppler shift on airborne SAR imaging are analysed in detail. Furthermore, the first experimental result of airborne NLFM SAR is demonstrated.
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