Results 21 to 30 of about 2,095,292 (244)

A Knowledge-Based Auxiliary Channel STAP for Target Detection in Shipborne HFSWR

Remote Sensing, 2021
The broadened first-order sea clutter in shipborne high frequency surface wave radar (HFSWR), which will mask the targets with low radial velocity, is a kind of classical space–time coupled clutter.
Liang Guo, Weibo Deng, Di Yao, Qiang Yang, Lei Ye, Xin Zhang   +5 more
doaj   +1 more source

The Application of JDL to Suppress Sea Clutter for Shipborne HFSWR [PDF]

International Journal of Antennas and Propagation, 2015
This paper deals with the problem of sea clutter suppression for shipborne high frequency surface wave radar (HFSWR) based on the joint domain localized (JDL) adaptive processing algorithm. The performance of the novel method is compared with 2D FFT plus digital beamforming (FFT-DBF) and orthogonal weight in different azimuths.
Zhenyuan Ji, Chunlei Yi, Junhao Xie, Yang Li   +3 more
openaire   +2 more sources

A Self-Regulating Multi-Clutter Suppression Framework for Small Aperture HFSWR Systems

Remote Sensing, 2022
The problem that this paper is concerned with is High Frequency Surface Wave Radar (HFSWR) detection of desired targets against a complex interference background consisting of sea clutter, ionosphere clutter, Radio Frequency Interference (RFI) and ...
Xiaowei Ji, Qiang Yang, Linwei Wang
doaj   +1 more source

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

Dolphin-inspired target detection for sonar and radar [PDF]

, 2014
Gas bubbles in the ocean are produced by breaking waves, rainfall, methane seeps, exsolution, and a range of biological processes including decomposition, photosynthesis, respiration and digestion.
Leighton, T.G., Leighton, T., White, P., White, P.R.   +3 more
core   +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

The Doppler Spectra of Medium Grazing Angle Sea Clutter; Part 1: Characterisation [PDF]

, 2016
This paper is concerned with the characterisation of Doppler spectra from high range resolution X-band radar sea clutter observed from an airborne platform over the range of grazing angles, 15° to 45°.
Rosenberg, L, Ritchie, MA, Watts, S, Bocquet, S   +3 more
core  

Esterified Cholesterol Conjugates Enable LNP‐Mediated mRNA Delivery to the Blood–Brain Barrier Following Intravenous Administration

Advanced Materials, EarlyView.
A cholesterol‐conjugated lipid library enabled the identification of a ligand‐free LNP platform for efficient mRNA delivery to brain endothelial cells via systemic administration. This platform achieves selective BBB targeting without disrupting barrier integrity, and enables modulation of neuroinflammation and vascular function without requiring trans‐
Zeru Tian, Xu Wang, Alexis Pacheco Benitez, Erick Guerrero, Yaou Duan, Jingwen Wei, Lukas Farbiak, Daniel J. Siegwart   +7 more
wiley   +1 more source