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Segmented Phase Code Waveforms: A Novel Radar Waveform for Spaceborne MIMO-SAR
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DOI：10.1109/TGRS.2020.3023385.png)
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The echo separation issue associated with different transmit antennas is the most technical challenge in realizing the multiple-input multiple-output (MIMO) synthetic aperture radar (SAR) system. In this article, a novel MIMO-SAR imaging scheme based on an advanced radar waveform, namely, segmented-phase-code (SPC) waveform, is proposed. Compared with the state-of-the-art short-term shift-orthogonal (STSO) waveform beamforming schemes, this scheme relieves the short-term shift-orthogonality condition of transmitted waveforms without losing the imaging performance, which extends the optional waveform space. In this scheme, the separation of the echoes from close arrival angles is ensured by a simple time-shift weighting processing. Furthermore, a range bandpass filter bank and the digital beamforming (DBF) technique are employed to ensure that the echoes from far arrival angles are separable. Finally, detailed simulation experiments are performed to verify the feasibility of the proposed scheme, and in-depth discussions of different waveforms and MIMO-SAR imaging schemes are presented.
Keyword:
Radar antennas
Radar imaging
Transmitting antennas
Spaceborne radar
Synthetic aperture radar
Imaging
Digital beam forming (DBF)
echo separation
multiple-input multiple-output (MIMO) synthetic aperture radar (SAR) (MIMO-SAR)
segmented-phase-code (SPC) waveform
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8.6
论文数:
2.1W
被引数:
10.7W
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Exploiting MIMO SAR Potentialities With Efficient Cross-Track Constellation Configurations for Improved Range Resolution利用MIMO SAR潜力和有效的跨航迹星座配置来提高距离分辨率
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