Results 111 to 120 of about 463 (152)

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

DFCW-LFM analysis for MIMO HFSWR

2016 CIE International Conference on Radar (RADAR), 2016
Recently, discrete frequency coding waveform with linear frequency modulation (DFCW-LFM) has been proved to have good autocorrelation sidelobe peak and cross ambiguity peak. This paper derives the multiple-input multiple-output (MIMO) radar ambiguity function (AF) of DFCW-LFM.
Changjun Yu, Guanghong Chang, Yonggang Ji, Yiming Wang, Aijun Liu   +4 more
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

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

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   +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

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

STAP process of shipborne HFSWR motion compensation

2012 IEEE 11th International Conference on Signal Processing, 2012
In this paper, analysis of the broadening effect of the first-order sea clutter in the HFSWR (High Frequeny Surface Waves Radar) radar system of moving shipborne platform is given. The platform is moving in six degrees of freedom (DOF) and the model of movement has been built.
Zhenyuan Ji, Zaiyang Duan, Junhao Xie, Yang Li   +3 more
openaire   +1 more source

Maritime surveillance using multi-frequency HFSWR

OCEANS 2016 - Shanghai, 2016
In these decades, great interest has been directed toward high frequency surface wave radars (HFSWR) as long range early warning tools in maritime surveillance. But HFSWR exhibit some shortcomings that need to be taken into account when detecting targets, such as poor azimuth resolution and significant presence of clutter.
Zezong Chen, Chao He, Chen Zhao, Longgang Zhang   +3 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