Results 131 to 140 of about 678 (183)

Track retrodiction for HFSWR

2015 16th International Radar Symposium (IRS), 2015
In this paper, we explore the possibility of track retrodiction to improve the track performance. To make use of the extra multi-frame data, we borrow the Rauch-Tung-Striebel (RTS) algorithm for the track retrodiction purpose. Using a converted extended Kalman filter (CMEKF) as the baseline, its retrodicted version, namely the retrodicted CMEKF, shows ...
Zhen Ding, Peter Moo
openaire   +1 more source

Ionospheric Interference Suppression in HFSWR

2006 1ST IEEE Conference on Industrial Electronics and Applications, 2006
Over the past two decades, significant advances have been made in the use of high frequency surface wave radar (HFSWR) for remote sensing in an ocean environment. As one of the main outside interference, ionospheric interference may badly affect radar's performance.
Huang. Liang, Wen. Biyang, Yao Min
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

Extraction of ionospheric clutter in HFSWR

2010 The 2nd International Conference on Industrial Mechatronics and Automation, 2010
The two main applications of High frequency surface wave radar (HFSWR) are maritime surveillance of the Exclusive Economic Zone (EEZ) and the remote sensing of the sea. Ionospheric clutter strongly limits the detection capabilities of HFSWR. In order to analyze the effect of ionospheric clutter, a method based on image processing is proposed to extract
Shang Shang, Ning Zhang, Yang Li
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

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 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

DOA Estimation for HFSWR Target Based on PSO-ELM

IEEE Geoscience and Remote Sensing Letters, 2022
High-frequency surface wave radar (HFSWR) plays an important role in vessel target surveillance. However, HFSWR's inaccuracy of azimuth estimation caused by wide beams severely limits its detection ability. To solve this problem, a novel direction of arrival (DOA) estimation method based on extreme learning machine optimized by particle swarm ...
Ling Zhang, Chenlu Shi, Jiong Niu
exaly   +2 more sources

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