Results 151 to 160 of about 1,492 (208)
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Suppression of Ionospheric Es Clutter in HFSWR
2006 CIE International Conference on Radar, 2006Ionospheric clutters from sporadic E-layer are often observed in 200 km-coverage HFSWR. One kind of the Es-layer clutters is found to have coherent time much longer than that of sea echoes. The feature is exploited in the proposal of a new algorithm to suppress this kind of clutter based on eigen value decomposition and subspace ...
Yin Wei +3 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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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 OSMAR
2006 7th International Symposium on Antennas, Propagation & EM Theory, 2006Experimental trials conducted from 2003 to 2005 in cast China sea demonstrated that HF surface wave radar (HFSWR) OSMAR (Ocean State Monitor and Analysis Radar) could be strongly affected by scattering from ionospheric structures and irregularities.
Wan Xianrong, Xiong Xinlong, Ke Hengyu
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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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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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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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Chaotic dynamics of ionospheric clutter from high frequency surface wave radar
IET Conference Proceedings, 2021The detection performance of high frequency surface wave radar is impacted by the ionospheric clutter. In order to suppress the ionospheric clutter, it is important to research the physical mechanism of ionosphere. In this paper, it is demonstrated, convincingly for the first time, the chaotic dynamics of the ionospheric clutter.
Z. Lyu, C. Yu, A. Liu
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Sea clutter simulation for skywave radar considering ionospheric diffuse scattering
2017 IEEE Radar Conference (RadarConf), 2017Ionospheric diffuse scattering is an important factor which leads to spread-Doppler clutter (SDC) in skywave radar. However, it is often ignored in a sea clutter model. In this paper, a sea clutter model for skywave radar considering ionospheric diffuse scattering was established.
Yueyu Guo, Yinsheng Wei, Rongqing Xu
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Ionospheric Decontamination and Sea Clutter Suppression for HF Skywave Radars
IEEE Journal of Oceanic Engineering, 2005In this paper, a cascaded correction and suppression method of reducing ionospheric phase path contamination and sea clutter to enable detection of targets travelling at speeds near the Bragg Doppler is addressed. The Hankel rank reduction (HRR) technique based on singular value decomposition (SVD) has been used to estimate the ionospheric phase ...
K. Lu, X. Liu, Y. Liu
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