Results 121 to 130 of about 463 (152)

Progress in HFSWR research at Harbin Institute of Technology

2003 Proceedings of the International Conference on Radar (IEEE Cat. No.03EX695), 2004
The Experimental HF Surface Over-The-Horizon Radar set up in the late of 80s has been updated by installation of multi-channel receivers with digitization at the second IF stage, new designed transmitting and receiving antennas, wideband solid-state power amplifiers, frequency synthesizer with low phase noise and flexible signal generator, a new radar ...
null Yongtan Liu, null Rongqing Xu, null Ning Zhang   +2 more
openaire   +1 more source

Experimental analysis of sea clutter in shipborne HFSWR

IEE Proceedings - Radar, Sonar and Navigation, 2001
The spreading of the dominant first order Bragg lines in shipborne HFSWR (high-frequency surface wave radar) severely obscures targets with Doppler frequencies within the spreading domain. STAP (space-time adaptive processing) is one of the effective methods for solving the problem.
J. Xie, Y. Yuan, Y. Liu
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

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

HFSWR based on synthetic impulse and aperture processing

IEE Proceedings - Radar, Sonar and Navigation, 2006
A novel high-frequency surface wave radar (HFSWR) has been proposed, which is based on the principles of synthetic impulse and aperture processing. It uses multiple omnidirectional transmit antennae to simultaneously transmit a set of orthogonal waveforms, and the echoed signals are received and processed by one or multiple reception arrays.
H. Su, H. Liu, P. Shui, S. Zhang, Z. Bao
openaire   +1 more source

HFSWR Performance Analyses in a Typical Equatorial Environment

2019 14th International Conference on Advanced Technologies, Systems and Services in Telecommunications (TELSIKS), 2019
In this paper a performance analysis of an High Frequency Surface Wave Radar (HFSWR) in a typical equatorial environment is presented. Statistical properties of HFSWR working environment (noise/clutter) and targets statistical properties are analyzed and mathematically modeled.
Snezana Puzovic, Zoran Cica, Ivan Gluvacevic, Pavle Petrovic, Dejan Nikolic   +4 more
openaire   +1 more source

Presegmentation-based adaptive CFAR detection for HFSWR

2012 IEEE Radar Conference, 2012
Common tasks of High-Frequency Surface Wave Radars (HFSWRs) are long-range ocean state monitoring and maritime surveillance with a strong focus on the detection of ships. Due to the heterogeneous background composed of sea-clutter and external noise the application of Constant False Alarm Rate (CFAR) algorithms with a single parameter set are likely to
J. O. Hinz, M. Holters, U. Zolzer, A. Gupta, T. Fickenscher   +4 more
openaire   +1 more source

Optimal sparse waveform design for HFSWR system

2007 International Waveform Diversity and Design Conference, 2007
High frequency surface wave radar (HFSWR) systems operate in heavily congested high frequency (HF) band. It is very difficult to find continuous clear channels for the wide-band HFSWR systems. Both the conventional frequency modulated continuous wave (FMCW) and the frequency modulated interrupted continuous wave (FMICW) are not able to solve the ...
W.X. Liu, Y.L. Lu, M. Lesturgie
openaire   +1 more source

Joint Detection and Tracking for Compact HFSWR

OCEANS 2023 - Limerick, 2023
Xiaotong Li, Weifeng Sun, Yonggang Ji, Yongshou Dai, Weimin Huang   +4 more
openaire   +1 more source

Target Direction Finding in HFSWR Sea Clutter Based on FRFT

2020
In high frequency surface wave radar (HFSWR), Doppler frequencies of the vessels targets may overlap the first order Doppler frequencies from the sea clutter interference. Therefor it is hard to discover the vessel targets and estimate direction of arrive (DOA) of the ship targets.
Shuai Shao, Changjun Yu, Aijun Liu, Yulin Hu, Bo Li 0034   +4 more
openaire   +1 more source