Results 121 to 130 of about 279 (160)
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A Model for the Ionospheric Clutter in HFSWR Radar
2008 International Conference on Information Management, Innovation Management and Industrial Engineering, 2008In order to find an effective arithmetic which can suppress the useless ionospheric clutter in a surface wave radar system, a new model for the ionospheric clutter is proposed here. Using the multiple phase-screen method used for the investigation of the HF wave propagation, the amplitude and phase scintillation of the ionospheric clutter can be ...
Long Zhao
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Ionospheric clutter cancellation and wavelet analysis
2006 First European Conference on Antennas and Propagation, 2006 A new approach based on wavelet analysis to mitigate ionospheric clutter from the high frequency surface wave radar Doppler/range image is presented in this paper.
Florent Jangal +2 more
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Suppression of Ionospheric Es Clutter in HFSWR
2006 CIE International Conference on Radar, 2006 Ionospheric 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 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 ...
Xingzhao Liu
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Characteristic research of ionospheric clutter in over the horizon HFSWR
IET Conference Publications, 2009 The presence of ionospheric clutter in high-frequency over the horizon surface wave radar may extremely affect the performance of radar system and degrade the capability of detecting target, so it should be suppressed. The characteristic analysis of ionospheric clutter is the foundation of studying method to suppress ionospheric clutter, so it is ...
null Jiang Wei, null Deng Weibo
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Ionospheric clutter modelling for VHF passive radars operating at high latitudes
IET International Conference on Radar Systems 2007, 2007 Passive VHF and UHF radars which prosecute FM and television broadcasts above 50 MHz at latitudes greater than 40 degrees will occasionally be subject to large amounts clutter from the ionosphere. Conventional pulsed, active radars can mitigate against auroral clutter by appropriate gating of the transmitter waveforms and receiver samples.
Meyer, M. G., M.G. Meyer
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Ionospheric Clutter Suppression in HF Surface Wave Radar OSMAR
2006 7th International Symposium on Antennas, Propagation & EM Theory, 2006 Experimental 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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Robust ionospheric clutter mitigation method for high frequency surface wave radar
Science in China Series F: Information Sciences, 2008This paper analyzes the characteristics of ionospheric clutter, which has proven to be the greatest impediment in high frequency surface wave radar (HFSWR). Ionospheric clutter influences most range bins, all Doppler bins and beams, and exhibits a high directivity.
Rongqing Xu, Gaopeng Li, Xu Rongqing
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A Data-Driven Deep Neural Network for Modeling of Ionospheric Clutter in HFSWR
IEEE Geoscience and Remote Sensing Letters, 2023Zhe Lyu, Changjun Yu, Aijun Liu
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Sea clutter simulation for skywave radar considering ionospheric diffuse scattering
2017 IEEE Radar Conference (RadarConf), 2017 Ionospheric 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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