Results 111 to 120 of about 531 (148)

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, Wu Xiongbin, Cheng Feng, Wan Xianrong   +3 more
openaire   +1 more source

A space-polarization collaborative algorithm for HFSWR

2016 CIE International Conference on Radar (RADAR), 2016
For the high frequency surface wave radar (HFSWR), the presence of ionospheric clutter seriously degrades its capability of receiving target echoes. Thus various ionospheric clutter mitigation methods are investigated based on space domain. However, the gains of antennas in vertical incidence can lead to channel amplitude inconsistency, which can ...
Yun-Long Yang, Xing-Peng Mao, Chun-Lei Zhao   +2 more
openaire   +1 more source

Remote monitoring of sea surface HFSWR

4th International Conference on Antenna Theory and Techniques (Cat. No.03EX699), 2004
The paper considers an excellent electrodynamics model of an excited sea surface when it is interpreted by spectral components of the backscattered HF signal for remotely monitored targets. A peculiarity of the application of the electrodynamics model is supposing that the excited sea surface section is a quasi-periodic random antenna array with ...
Bondarenko, B. F., Bondarchuk, G. M., Dmitriyeva, N. V., Zarudnev, I. I., Lupan, Y. A., Platonov, S. Y., Tymchuk, V. Y.   +6 more
openaire   +2 more sources

Track Matching Based on ELM for HFSWR

2019 Chinese Automation Congress (CAC), 2019
High frequency surface wave radar (HFSWR) plays an important role in marine surveillance and target tracking. However, in the complex environment of interference, the ship target signals will be submerged, which lead to track breakage and miscorrelation.
Ling Zhang, Wang Xiong, Jiong Niu, Q. M. Jonathan Wu, Yonggang Ji, Liping Zeng   +5 more
openaire   +1 more source

Adaptive cochannel interference suppression based on subarrays for HFSWR

IEEE Signal Processing Letters, 2005
The paper analyzes the characteristics of cochannel interference (CCI) in the high-frequency (HF) surface wave radar (HFSWR), which adopts the linear frequency modulated interrupted continuous wave (FMICW). CCI will influence all the range bins, including all the positive and negative frequencies, and the negative frequency range bins contain only the ...
Xianrong Wan, Hengyu Ke, Biyang Wen
openaire   +2 more sources

Performance analysis of target detection with compact HFSWR

2016 CIE International Conference on Radar (RADAR), 2016
High frequency surface wave radar (HFSWR) can continuously detect and track vessel targets over the horizon in real time. Compact HFSWR with a small aperture has the advantage of occupying smaller radar site, lower power consumption, easy deployment and maintenance.
Yonggang Ji, Jie Zhang, Yiming Wang, Guanghong Chang, Weifeng Sun   +4 more
openaire   +1 more source

A small array HFSWR system for ship surveillance

IET International Radar Conference 2015, 2015
A HFSWR system with portable small array for ship targets surveillance has been developed recently. The antennas of the radar system contain a receiving antenna array of eight-elements and an omnidirectional transmitting antenna, which can be deployed rapidly when relocated to another radar site. The configuration and the relationship of each subsystem
Y.G. Ji, J. Zhang, Y.M. Wang, X.L. Chu, C.J. Yu, A.J. Liu, M. Li, J. Niu, L. Zhang, W.F. Sun   +9 more
openaire   +1 more source

Optimum weights of DPCA processing for shipborne HFSWR

ICSP '98. 1998 Fourth International Conference on Signal Processing (Cat. No.98TH8344), 2002
The displaced phase center antenna (DPCA) can be used to detect a ship in broadened first order Bragg lines due to platform motion in shipborne HFSWR (high frequency surface wave radar). In the paper it is shown that, by an analogy with the optimum weights of MTI (moving target indicator), the DPCA processing introduced by Xie et al.
null Junhao Xie, null Yeshu Yuan, null Yongtan Liu   +2 more
openaire   +1 more source

A Model for the Ionospheric Clutter in HFSWR Radar

2008 International Conference on Information Management, Innovation Management and Industrial Engineering, 2008
In 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 ...
openaire   +1 more source

Bi-static and multi-frequency experiments of HFSWR

OCEANS 2009, 2009
High Frequency Surface Wave Radar is currently a well-known surveillance system for the Exclusive Economic Zone. We are still trying to improve their performances and reliability. In this new research step, we are trying to assess the benefits of multi-static as well as multi-frequency configuration. The global ambition is obviously to overcome clutter
M. Menelle, F. Jangal, V. Bazin, D. Lecoz, G. Auffray   +4 more
openaire   +1 more source