Results 21 to 30 of about 93 (63)

First order sea clutter cross section for bistatic shipborne HFSWR [PDF]

Journal of Systems Engineering and Electronics, 2017
This paper studies the development on the first order sea clutter cross section for bistatic high frequency surface wave radar (HFSWR). Based on the received first order electric field expression, a closed-form of cross sections is derived to account for the case of receiving antenna array being mounted on the shipborne platform.
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Sea clutter suppression for shipborne HFSWR using joint sparse recovery‐based STAP

Electronics Letters, 2016
On the basis of the intrinsic sparsity of sea clutter in shipborne high‐frequency surface wave radar, a joint sparse recovery‐based space–time adaptive processing (STAP) technique is proposed to suppress the spread sea clutter. In the proposed method, the partial clutter subspace is first estimated with training samples from only one range cell ...
Yongpeng Zhu, Yinsheng Wei, Kaihui Zhu
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Target Detection and Estimation for Shipborne HFSWR Based on Platform Steering Imaging

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Wang, Jiaqi, Liu, Aijun, Yu, Changjun, Yang, Kaixian   +3 more
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First‐order ocean surface cross‐section for shipborne HFSWR

Electronics Letters, 2013
Onshore high‐frequency surface wave radar (HFSWR) has been successfully deployed for early warning and ocean remote sensing. However, there remain potential gaps in ocean remote sensing for shipborne HFSWR. Based on the first‐order bistatic field equation, the first‐order ocean surface cross‐section for shipborne HFSWR is derived, whose validity is ...
Junhao Xie
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Ocean surface cross sections for shipborne HFSWR with sway motion [PDF]

Radio Science, 2016
AbstractTo interpret the essential characteristics of the sea echo backscattered from the ocean surface, the first‐ and second‐order ocean surface cross sections are mathematically derived for an omnidirectional receiving sensor in monostatic shipborne high‐frequency surface wave radar (HFSWR), where the uniform linear motion and sway motion are ...
Junhao Xie, Guowei Yao
exaly   +2 more sources

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Analysis and Estimation of Shipborne HFSWR Target Parameters Under the Influence of Platform Motion

IEEE Transactions on Geoscience and Remote Sensing, 2021
For onshore high-frequency surface-wave radar (HFSWR), target parameter estimation focuses mainly on distance and velocity demodulation, then on azimuth determination. However, these parameters are difficult to solve accurately for shipborne HFSWR targets due to additional modulation on the echo signal introduced by the forward and six-degree-of ...
Ling Zhang, Yonggang Ji, Q M Jonathan Wu   +2 more
exaly   +2 more sources

Prediction cancellation method of sea clutter in shipborne HFSWR

Electronics Letters, 2016
Sea clutter has a serious influence on the detection performance of a shipborne high‐frequency surface wave radar (HFSWR) system, especially when the target is submerged in the spread Doppler spectrum of the first‐order sea clutter. A prediction cancellation (PC) method based on the radial basis function neural network (RBFNN) is put forward to ...
Junhao Xie, Chunlei Yi
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An Improved Oblique Projection Method for Sea Clutter Suppression in Shipborne HFSWR

IEEE Geoscience and Remote Sensing Letters, 2016
Sea clutter has a major impact on the detection performance of a shipborne high-frequency surface wave radar (HFSWR) system. Due to the platform motion of shipborne HFSWR, the Doppler spectrum of the first-order sea clutter suffers from some broadening so that the targets submerged in this broadening Doppler spectrum can be hardly detected.
Junhao Xie, Chunlei Yi, Ratnasingham Tharmarasa   +2 more
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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
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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 ...
Junhao Xie, Minglei Sun
exaly   +2 more sources