Results 151 to 160 of about 678 (183)

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

Design of an IMM-NNJPDA tracker for HFSWR

2016 17th International Radar Symposium (IRS), 2016
In this paper, an IMM-NNJPDA tracker was evaluated to test its capability of handling sharp turn motions for ships. With the flexibility of disabling one of the two models, two additional trackers are available: a Constant Velocity (CV) model NNJPDA (CV-NNJPDA) tracker and a Singer model NNJPDA (Singer-NNJPDA) tracker. All three trackers were evaluated
Zhen Ding, Peter Moo
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

High resolution MIMO-HFSWR using sparse frequency waveform

2008 9th International Conference on Signal Processing, 2008
In this paper, we propose a concept of multiple-input multiple-output high frequency surface wave radar (MIMO-HFSWR) system with widely separated antennas transmitting and receiving the sparse frequency waveforms. The proposed concept obtains several advantages over the conventional HFSWR system such as finer resolutions and better flexibility.
null Guohua Wang, null Yilong Lu
openaire   +1 more source

Second-Order Ocean Surface Cross Section for Shipborne HFSWR

IEEE Antennas and Wireless Propagation Letters, 2015
To investigate the characteristics of sea clutter in monostatic shipborne high-frequency surface-wave radar (HFSWR) with uniform linear motion, the second-order patch scatter cross section is derived. With the previously proposed first-order ocean surface cross section, both cross sections could be reduced to the existing results in land-based HFSWR ...
Minglei Sun, Junhao Xie, Zhenyuan Ji, Wenhan Cai   +3 more
openaire   +1 more source

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

A new method for ionospheric clutter suppression in HFSWR

Proceedings of 2011 IEEE CIE International Conference on Radar, 2011
High frequency surface wave radar (HFSWR) is an effective early warning radar, but the detection performance is impacted by the ionospheric clutter seriously. In order to suppress the ionospheric clutter, a segment accumulation algorithm is proposed, based on the time-frequency characteristics of the ionospheric clutter.
null Shang Shang, null Zhang Ning, null Li Yang   +2 more
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
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HFSWR Clutter Recognition Based on Attention DCNN

2023 IEEE International Radar Conference (RADAR), 2023
Yuanbiao Li, Lei Yu, Yinsheng Wei
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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