Results 31 to 40 of about 444 (225)

Weak Target Detection in the Presence of Sea Clutter Using Radon-Fractional Fourier Transform Canceller

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
In this article, we propose a new weak maneuvering target detection method in a sea environment with a Radon-fractional Fourier transform (RFrFT) canceller, which can efficiently suppress the sea clutter and detect targets with low computations.
Chang Gao, Ran Tao, Xuejing Kang
doaj   +1 more source

Femtosecond‐Laser‐Induced Physical Unclonable Random Maze Structure for Storage‐Free Encryption

Advanced Science, EarlyView.
Femtosecond‐laser‐induced gold random maze structures serve as multimodal physical unclonable functions for storage‐free encryption. Their stochastic optical, electrical, and Raman responses are generated by plasmon‐assisted Marangoni formation and converted into AES‐compatible keys without permanent secret‐key storage, offering a portable route toward
Shiru Jiang, Hongliang Li, Shengjie Ma, Sang‐Shin Lee, Lei Wang, Mengyun Hu, Heping Zeng   +6 more
wiley   +1 more source

Sea Clutter Suppression Method Based on Pyramid Multiscale Residual Attention Generative Adversarial Network

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Sea clutter significantly impacts radar maritime target detection. Existing methods still show limited clutter suppression performance, and their generalization ability requires further improvement. To address this issue, a sea clutter suppression method
Xiaolin Du, Keyao Lai, Xiaolong Chen, Guolong Cui, Jibin Zheng, Jinwei Wang, Dawei Zhao, Shuang Yu, Xuekuan Shi   +8 more
doaj   +1 more source

Waveform Design for Improved Detection of Extended Targets in Sea Clutter

Sensors, 2019
Adaptive waveform design for cognitive radar in the case of extended target detection under compound-Gaussian (CG) sea clutter is addressed. Based on the CG characteristics of sea clutter, the texture component is employed to characterize the clutter ...
Linke Zhang, Na Wei, Xuhao Du
doaj   +1 more source

Revolutionising Agricultural Sustainability: New ‘Furrow Tillage’ can Mitigate Short‐Term Soil‐to‐Atmosphere CO2 Flux and Promote Soil‐Plant‐Microbe Health

Advanced Science, EarlyView.
Furrow tillage resolves the conventional‐vs.‐no‐tillage trade‐off by simultaneously cutting CO2 efflux to 2.0–3.0 g C m−2 d−1 and unlocking high nutrient availability for the rice rhizosphere. This scalable agronomic solution strengthens soil health, enhances plant physiology, reshapes microbial metabolism, and shifts paddy systems toward a net ...
Arnab Majumdar, Munish Kumar Upadhyay, Argha Ghosh, Rakesh Biswas, Ioly Kotta Loizou, Martin Buck, Mark Tibbett, Biswajit Giri, Debojyoti Moulick, Manoj Kumar Jaiswal, Tarit Roychowdhury   +10 more
wiley   +1 more source

Overview and Prospects of Radar Sea Clutter Measurement Experiments

Leida xuebao, 2019
In complex marine environments, sea clutter greatly affects the detection performance of maritime targets. Because the influencing factors of sea clutter are numerous and the mechanism is complex, there are great difficulties in feature description and ...
DING Hao, LIU Ningbo, DONG Yunlong, CHEN Xiaolong, GUAN Jian   +4 more
doaj   +1 more source

Ionospheric Clutter Suppression with an Auxiliary Crossed-Loop Antenna in a High-Frequency Radar for Sea Surface Remote Sensing

Journal of Marine Science and Engineering, 2021
Ionospheric clutter is one of the main problems for high-frequency surface wave radars (HFSWRs), as it severely interferes with sea surface state monitoring and target detection.
Shuqin He, Hao Zhou, Yingwei Tian, Wei Shen   +3 more
doaj   +1 more source

Hierarchical Physical‐Cyber Encryption via Metasurface‐Encoded Holographic Keys

Advanced Science, EarlyView.
ABSTRACT Physical‐layer encryption based on metasurfaces has emerged as a promising alternative to conventional algorithmic cryptography by embedding security into physical processes. However, most existing metasurface‐based encryption schemes operate within single‐stage or static frameworks, where correct physical illumination directly reveals the ...
Zhen Liu, Changhong Dai, Wei Zhu, Ruisheng Yang, Bohan Zhang, Lei Zhang, Bobo Du, Shengxiang Wang, Guangwei Hu   +8 more
wiley   +1 more source

Signal processing algorithm of ship navigation radar based on azimuth distance monitoring

International Journal of Metrology and Quality Engineering, 2019
The effect of ship navigation radar signal processing has a great impact on the overall performance of the radar system. In this paper, the signal processing algorithm is studied.
Qin Yuxin, Chen Yu
doaj   +1 more source

A severely range ambiguous clutter suppression method based on multi‐domain cascaded signal processing for space‐based early warning radar

IET Radar, Sonar & Navigation, 2023
The non‐stationary clutter phenomenon and the severe range ambiguity make space‐based early warning radar as an intricate model of received ground and sea clutter.
Tianfu Zhang, Zhihao Wang, Mengdao Xing, Shuangxi Zhang, Yongliang Wang   +4 more
doaj   +1 more source