Results 21 to 30 of about 444 (225)

Multichannel Sea Clutter Measurement and Space-Time Characteristics Analysis with L-Band Shore-Based Radar

Remote Sensing, 2022
In order to study the space-time characteristics of sea clutter, the sea clutter is always measured by the airborne multichannel radar; however, the sea clutter shows the heterogeneity between range gates, which means the space-time covariance matrix’s ...
Jintong Wan, Feng Luo, Yushi Zhang, Jinpeng Zhang, Xinyu Xu   +4 more
doaj   +1 more source

Research on Multi-Domain Dimensionality Reduction Joint Adaptive Processing Method for Range Ambiguous Clutter of FDA-Phase-MIMO Space-Based Early Warning Radar

Remote Sensing, 2022
The ground and sea clutter received by space-based early warning radar (SBEWR) has severely range ambiguous characteristics due to its platform location, and the non-stationary factor caused by Earth’s rotation makes the received clutter at different ...
Tianfu Zhang, Zhihao Wang, Mengdao Xing, Shuangxi Zhang, Yongliang Wang   +4 more
doaj   +1 more source

A Novel Main-Lobe Cancellation Method Based on a Single Notch Space Filter and Optimized Correlation Analysis Strategy

International Journal of Antennas and Propagation, 2019
The high-frequency hybrid sky-surface wave radar (HFSSWR) is a new kind of over-the-horizon radar system. Combining the advantages of both the sky wave radar and the surface wave radar, HFSSWR has drawn much attention in recent years.
Jiazhi Zhang, Xin Zhang, Weibo Deng, Liang Guo, Qiang Yang   +4 more
doaj   +1 more source

Sea clutter suppression using neural network

Maritime Technology and Research
Sea clutter suppression is a critical task in radar systems to enhance target detection performance in complex naval environments and at coastlines. This paper discusses the use of neural networks for marine clutter suppression and coastal surveillance radar clutter suppression.
Ravi Kumar Kandagatla, Vineela Malapati, Krishnaveni Cherukuri, Bharadwaj Sindhe, Vijaya Kumar Padarti, Bala Krishna Thammileti   +5 more
openaire   +1 more source

Land-sea Separation and Sea Surface Zoning Algorithms for Sea Surface Target

Leida xuebao, 2019
Adaptive detection can effectively improve the detection performance of marine surveillance radars; however, the islands or lands introduce discrete or flaky strong clutter, which may result in wrong covariance matrix estimation.
ZHOU Ming, MA Liang, WANG Ning, YANG Yuhao   +3 more
doaj   +1 more source

Multimodal Locomotion in Insect‐Inspired Microrobots: A Review of Strategies for Aerial, Surface, Aquatic, and Interfacial Motion

Advanced Robotics Research, EarlyView.
This review identifies key design considerations for insect‐inspired microrobots capable of multimodal locomotion. To draw inspiration, biological and robotic strategies for moving in air, on water surfaces, and underwater are examined, along with approaches for crossing the air–water interface.
Mija Jovchevska, Kaushik Jayaram, Nicole Xu   +2 more
wiley   +1 more source

A novel sea clutter suppression method based on SVD‐FRFT at low signal‐to‐clutter ratio

Electronics Letters, 2023
Abstract 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‐
Qingyun Cheng, Xiaochuan Wu, Xin Zhang, Qiang Yang   +3 more
openaire   +1 more source

Learning‐Based Soft Robotic Grasping: Recent Progress and Remaining Challenges

Advanced Robotics Research, EarlyView.
This review analyzes learning‐based soft robotic grasping from a pipeline‐oriented perspective, encompassing soft gripper design, multimodal sensing, and learning‐based planning and control. It surveys key neural network architectures and benchmark datasets and identifies critical challenges such as sim‐to‐real transfer, generalization, and continual ...
Arnab Majumder, Jelizaveta Konstantinova, Graham Deacon, Kaspar Althoefer   +3 more
wiley   +1 more source

Property Analysis and Suppression Method of Real Measured Sea Spikes

Leida xuebao, 2015
In case of high-resolution, low grazing angle, high sea state, and horizontal transmitting, horizontal receiving polarization, the radar returns are strengthened, resulting in sea spikes.
Huang Yong, Chen Xiao-long, Guan Jian
doaj   +1 more source

A Single-Dataset-Based Pre-Processing Joint Domain Localized Algorithm for Clutter-Suppression in Shipborne High-Frequency Surface-Wave Radar

Sensors, 2020
Due to the motion of the platform, the spectrum of first-order sea clutter will widen and mask low-velocity targets such as ships in shipborne high-frequency surface-wave radar (HFSWR).
Liang Guo, Xin Zhang, Di Yao, Qiang Yang, Yang Bai, Weibo Deng   +5 more
doaj   +1 more source