Results 1 to 10 of about 64 (58)
IET Radar, Sonar & Navigation, 2023 Abstract A great interest has been directed towards high frequency surface wave radar (HFSWR), because it is applied as long‐range early warning and real‐time measurements of sea surface condition tools in maritime surveillance. However, the unwanted reflection from the ionosphere (ionosphere clutter) damages the consistent detection ...
Xiaowei Ji +3 more
exaly +5 more sources
Towards a Cognitive Radar: Canada's Third-Generation High Frequency Surface Wave Radar (HFSWR) for Surveillance of the 200 Nautical Mile Exclusive Economic Zone. [PDF]
Sensors (Basel), 2017 Canada’s third-generation HFSWR forms the foundation of a maritime domain awareness system that provides enforcement agencies with real-time persistent surveillance out to and beyond the 200 nautical mile exclusive economic zone (EEZ). Cognitive sense-and-adapt technology and dynamic spectrum management ensures robust and resilient operation in the ...
Ponsford A +4 more
europepmc +7 more sources
Sea Clutter Suppression Method of HFSWR Based on RBF Neural Network Model Optimized by Improved GWO Algorithm. [PDF]
Comput Intell Neurosci, 2020 The detection performance of high‐frequency surface‐wave radar (HFSWR) is closely related to the suppression effect of sea clutter. To effectively suppress sea clutter, a sea clutter suppression method based on radial basis function neural network (RBFNN) optimized by improved gray wolf optimization (IGWO) algorithm is proposed.
Shang S +5 more
europepmc +2 more sources
IET Radar, Sonar &Navigation, Volume 17, Issue 11, Page 1639-1645, November 2023., 2023 The authors proposes a new real‐time method to estimate the significant wave height directly from the antenna's received electric field in the time‐domain without requiring prior knowledge of the motion parameters or performing motion compensation. The results from this simple proposed technique show that it may be used to estimate the significant wave
Sepideh Hashemi +2 more
wiley +1 more source
IET Radar, Sonar &Navigation, Volume 17, Issue 10, Page 1498-1506, October 2023., 2023 Based on the time difference direction‐finding algorithm, new mathematical expressions of geometric dilution of precision (GDOP) are presented in Time Difference of Arrival positioning systems in this paper. The time difference direction‐finding reveals that the angle measurements are accurate for any length of baseline.
Yang Bai +3 more
wiley +1 more source
A novel sea clutter suppression method based on SVD‐FRFT at low signal‐to‐clutter ratio
Electronics Letters, Volume 59, Issue 14, July 2023., 2023 The target and sea clutter Doppler domains frequently overlap due to the frequent passage of slow ship targets through the sea clutter zone. In this letter, a novel sea clutter suppression method is suggested as a solution to this issue, whose key is a novel singular value zeroing criterion guided by the search results of two‐dimensional spectral peaks.
Qingyun Cheng +3 more
wiley +1 more source
A CFAR‐like detector based on neural network for simulated high‐frequency surface wave radar data
IET Radar, Sonar &Navigation, Volume 17, Issue 5, Page 859-875, May 2023., 2023 This article presents a deep neural network‐based constant false alarm rate detector for high‐frequency surface wave radar. A deep neural network is trained to identify fluctuation parameters of each cell of a range‐Doppler power spectrum based on the patterns present in the neighbouring cells.
Rômulo Fernandes da Costa +3 more
wiley +1 more source
IET Radar, Sonar &Navigation, Volume 17, Issue 4, Page 545-555, April 2023., 2023 This study proposes a hyper beamforming‐joint domain localised algorithm that can effectively remove the effect of ionospheric clutter for small‐array and low degree of freedom, which is applicable at low signal‐to‐clutter ratio. The algorithm can assist target detection and tracking under ionospheric clutter background.
Jiaming Li, Qiang Yang, Xin Zhang
wiley +1 more source
IET Radar, Sonar &Navigation, Volume 17, Issue 4, Page 571-578, April 2023., 2023 The article considers the case of a monostatic HF radar configuration where the transmitting antenna is on a floating platform while the receiving antenna is fixed. The proposed non‐linear optimisation‐based method in this article is able to successfully estimate the parameters of motion of the floating platform without prior knowledge of them and is ...
Sepideh Hashemi +2 more
wiley +1 more source
Journal of Engineering, Volume 2023, Issue 1, 2023., 2023 Thelong‐distance coverage of high‐frequency surface wave radar (HFSWR) has promoted it as an enormous means for ship monitoring on the country’s maritime territory. Since it is a primaryradar, noncooperative targets can also be detected. However, this radar also has a shortcoming of low spatial and temporal resolutions due to the narrow available ...
Iswandi +3 more
wiley +1 more source