Results 131 to 140 of about 279 (160)
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An analytical model for HF radar ionospheric clutter
2013 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2013In this paper, an analytic model for the mixed path mode of ionospheric clutter associated with high frequency surface wave radars (HFSWR) operating in an ocean environment is presented. Based on earlier work, an expression for the first-order received electric field after a single scatter from each of the ionosphere and sea surface is derived and ...
John Walsh, Weimin Huang, Eric W. Gill
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Ionospheric Clutter Suppression in HF Surface Wave Radar
Journal of Electromagnetic Waves and Applications, 2009The ionospheric clutter has been proved to be one of the dominant clutters degrading the performance of the HF surface-wave radar (HFSWR) severely, so suppressing the ionospheric clutter is a vital part of radar signal processing sequence. In this paper, the spatial characteristics of the ionospheric clutter in a planar array are analyzed, then a new ...
M. Wu, B. Y. Wen, H. Zhou
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An ionospheric clutter recognition method based on machine learning
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2017Ionospheric clutter is the primary factor that affecting High Frequency Surface Wave Radar (HFSWR) detection performance. In order to draw up an adaptive detection strategy suitable in various environment, a novel algorithm is proposed in this paper to recognize ionospheric clutter.
Yang Li, Mengke He, Ning Zhang
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2018 International Conference on Radar (RADAR), 2018
Ionosphere clutter is one of the majority interference in High Frequency Surface Wave Radar. Duo to the ionosphere is a time-varying, non-stationary and layered lossy media, the ionosphere clutter suppression problem become a stubbornly challenge.
Zhou Jianyu, Wei Yinsheng, Xu Rongqing
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Ionosphere clutter is one of the majority interference in High Frequency Surface Wave Radar. Duo to the ionosphere is a time-varying, non-stationary and layered lossy media, the ionosphere clutter suppression problem become a stubbornly challenge.
Zhou Jianyu, Wei Yinsheng, Xu Rongqing
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Ionospheric Clutter Suppression in HFSWR Using Multilayer Crossed-Loop Antennas
IEEE Geoscience and Remote Sensing Letters, 2014Ionospheric clutter resulting from undesired radio signals reflected by the ionosphere severely deteriorates the detection performance of the high-frequency surface wave radar (HFSWR) in the mid- and low-latitude regions. To solve this problem, we propose a novel antenna configuration and method, i.e., using vertically placed, coaxial, multilayer ...
Hao Zhou 0002, Biyang Wen, Shicai Wu
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Ionospheric clutter analysis and suppression in a distributed MIMO-HFSWR system
OCEANS 2014 - TAIPEI, 2014In distributed MIMO (multiple-input-multiple-output)-HFSWR (high frequency surface wave radar), multiple detection modes are introduced to enrich the detection information, however making ionospheric clutter more complicated. In this paper, a distributed MIMO-HFSWR system involving three monostatic radars is introduced.
Xu Xing-an +3 more
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Ionospheric clutter model for high frequency surface wave radar
2012 IEEE Radar Conference, 2012The detection performance of a high frequency surface wave radar (HFSWR) system is primarily limited by clutter, especially ionospheric clutter. Therefore, in order to analyze and/or simulate the capabilities of an HFSWR system a model for the clutter is required.
M. Ravan, R. S. Adve
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Characteristic Investigation of Ionospheric Clutter of a Coastal High-Frequency Radar
2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO), 2018High frequency (HF) radar can overcome the limits caused by the curvature of the earth when its electromagnetic wave operated over high conductivity sea water. The HF radar spectrum is critical for large-area current mapping because of mechanism of Bragg resonance.
Yu Jen Chung +4 more
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Ionospheric clutter suppression using Wavelet Oblique Projecting Filter
2017 IEEE Radar Conference (RadarConf), 2017The detection performance of High Frequency Surface Wave Radar (HFSWR) is influenced by the nonstationary ionospheric clutter. For decades, ionospheric clutter suppression is always a challenging problem. Targets and ionospheric clutter have different 2D scale features in Range-Doppler map (RD map) of radar because of different stationarity and range ...
Yuan Su +3 more
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Ionosphere clutter suppression based on sparse space spectrum rebuild beamforming
2016 CIE International Conference on Radar (RADAR), 2016Conventional beamforming method is sensitive to the error of the array system, and easy to cause the desired signal self-cancellation phenomenon, especially when SNR is high. However, the strong ionosphere clutter often appears in the high frequency surface wave radar. These clutter will make the traditional beamforming algorithm ineffective.
Jianyu Zhou, Gaopeng Li, Rongqing Xu
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