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首页> 外文期刊>IEEE Transactions on Geoscience and Remote Sensing >A Millimeter-Wave GCW-SAR Based on Deramp-on-Receive and Piecewise Constant Doppler Imaging
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A Millimeter-Wave GCW-SAR Based on Deramp-on-Receive and Piecewise Constant Doppler Imaging

机译：基于透明度接收和分段恒定多普勒成像的毫米波GCW-SAR

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摘要

A novel generalized continuous-wave synthetic aperture radar (GCW-SAR) based on deramp-on-receive operating in millimeter-wave frequency is proposed in this article. With deramp-on-receive, the receiver sampling rate is drastically reduced, and the downsampled 1-D raw data can be obtained from the received beat signal. Further adopting piecewise constant Doppler (PCD) imaging in the digital domain, a GCW-SAR image can be easily reconstructed by using the existing frequency-modulated continuous-wave (FMCW) radar system. The effects of deramp-on-receive in PCD imaging are analyzed accordingly. The short wavelength of the millimeter-wave carrier used in the proposed GCW-SAR enables high azimuth resolution as well as a short synthetic aperture, which, in turn, significantly reduces the imaging computational complexity. Simulation and experimental results confirm the advantages of the proposed GCW-SAR.
机译：在本文中提出了一种基于毫米波频率的裂痕接通的新型广义连续波合成孔径雷达（GCW-SAR）。通过透明度接收，接收器采样率大幅度减小，并且可以从接收的节拍信号获得下采样的1-D原始数据。进一步采用分段恒定多普勒（PCD）成像在数字域中，可以通过使用现有的频率调制的连续波（FMCW）雷达系统容易地重建GCW-SAR图像。相应地分析了PCD成像的裂缝接收的影响。所提出的GCW-SAR中使用的毫米波载体的短波长使得具有高方位角分辨率以及短的合成孔径，其又可以显着降低成像计算复杂度。仿真和实验结果证实了提出的GCW-SAR的优势。

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