Results 1 to 10 of about 6,104,035 (281)
A Range Ambiguity Suppression Processing Method for Spaceborne SAR with Up and Down Chirp Modulation [PDF]
Sensors, 2018 Range ambiguity is one of the factors which affect the SAR image quality. Alternately transmitting up and down chirp modulation pulses is one of the methods used to suppress the range ambiguity.
Xuejiao Wen +5 more
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Clutter and Range Ambiguity Suppression Using Diverse Pulse Train in Pulse Doppler System [PDF]
Sensors, 2018 Pulse Doppler (PD) systems are widely used for moving target detection, especially in scenarios with clutter. Range ambiguity, which arises from fixed parameters in waveforms, is an inherent drawback in conventional systems.
Jiacen Xu +4 more
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Method of Range Ambiguity Suppression Combining Sparse Reconstruction and Matched Filter
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022 Synthetic aperture radar (SAR) images are often affected by range ambiguity due to antenna sidelobe characteristics and pulse operating mechanism. The work of range ambiguity suppression focuses on both SAR system design and signal processing. On the one
Meng Qi +4 more
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Azimuth Phase Coding for Range Ambiguity Suppression in SAR [PDF]
IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004 A novel ambiguity suppression technique is proposed. Range ambiguities in synthetic aperture radar (SAR) images are eliminated with an azimuth filter after having applied an azimuth phase modulation to the transmitted pulses and a corresponding demodulation to the received pulses. The technique excels by actually eliminating the ambiguities rather than
Jørgen Dall
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Azimuth Phase Coding by Up and Down Chirp Modulation for Range Ambiguity Suppression [PDF]
IEEE Access, 2019 High range ambiguity level will impair the spaceborne SAR image quality and hamper following SAR image applications. The range ambiguity suppression effect of the up and down chirp modulation on spaceborne SAR images is analyzed in this paper.
Wei Xu, Pingping Huang, Weixian Tan
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IEEE Journal of Selected Topics in Applied Earth Observations and Remote SensingStaggered synthetic aperture radar (SAR) is compatible with quadrature-polarimetric (quad-pol) SAR, enabling ultrawide continuous swath quad-pol SAR imaging with fine azimuth resolution.
Ruizhen Song +4 more
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Remote SensingMultiple-input multiple-output (MIMO) synthetic aperture radar (SAR) is a promising scheme for high-resolution wide-swath (HRWS) imaging. After echo separation processing, a MIMO-SAR system can provide many equivalent phase centers (EPCs) in azimuth ...
Haonan Zhao +5 more
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Investigations on OFDM Signal for Range Ambiguity Suppression in SAR Configuration [PDF]
IEEE Transactions on Geoscience and Remote Sensing, 2014 This paper presents an opportunity to cancel range ambiguities in synthetic aperture radar (SAR) configuration. One of the limitations of SAR systems is the range ambiguity phenomenon that appears with long delayed echoes. The reflected signal corresponding to one pulse is detected when the radar has already transmitted the next pulse.
Jean-Yves Baudais
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Method of Range Ambiguity Suppression Combining Sparse Reconstruction and Matched Filtering
Leida xuebao, 2022 To a certain extent, SAR images are affected by range ambiguity due to antenna sidelobe characteristics and pulse operating system. The work of range ambiguity suppression focuses on SAR system design and signal processing.
Meng QI +5 more
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Joint suppression method for range-Doppler ambiguity sidelobes in DTMB-based passive bistatic radar [PDF]
Scientific ReportsTo mitigate the impact of the suboptimal ambiguity function of digital television terrestrial multimedia broadcasting (DTMB) signal, used as the illuminator of opportunity in passive bistatic radar, this paper provides a detailed analysis of the ...
Yong Wu, Luo Zuo, Jue Wang, Dan Wang
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