Results 71 to 80 of about 2,637 (215)

Research on Polarization Cancellation of Nonstationary Ionosphere Clutter in HF Radar System

International Journal of Antennas and Propagation, 2015
Oblique projection polarization filter (OPPF) can be applied as an effective approach for interference cancellation in high-frequency surface wave radar (HFSWR) and other systems. In order to suppress the nonstationary ionosphere clutter further, a novel
Xingpeng Mao, Hong Hong, Weibo Deng, Yongtan Liu   +3 more
doaj   +1 more source

Space-polarization Collaborative Suppression Method for Ionospheric Clutter in HFSWR

Leida xuebao, 2016
High Frequency Surface Wave Radar (HFSWR) is able to receive surface target and low-flying aircraft echoes at a long-distance, but it suffers severely from ionospheric clutter.
Yang Yunlong, Mao Xingpeng, Dong Yingning, Deng Weibo   +3 more
doaj   +1 more source

Reverberation Clutter Suppression Using 2-D Spatial Coherence Analysis. [PDF]

IEEE Trans Ultrason Ferroelectr Freq Control, 2022
Ahmed R, Bottenus N, Long J, Trahey GE.
europepmc   +1 more source

Where were all the trees? Computer vision meets landscape history to unlock the potential of historical Ordnance Survey maps

People and Nature, EarlyView.
Abstract The first edition of the Ordnance Survey's 1:2500 County Series is marked with treed areas, such as woodlands and orchards, and, remarkably, freestanding trees. Consequently, it is an unparalleled source of information on the distribution of trees across Britain in the mid‐late nineteenth century, when the maps were first surveyed. In order to
Toby Pillatt, William A. P. Smith
wiley   +1 more source

Dual-channel Clutter Cancellation Processing Method via Space-time Decoupling for Airborne BiSAR

Leida xuebao
Clutter suppression is an important technology for moving target indication. However, for Bistatic Synthetic Aperture Radar (BiSAR) moving target indication, traditional space-time adaptive processing and displaced phase center antenna methods cannot ...
Jun’ao LI, Zhongyu LI, Qing YANG, Junjie WU, Jianyu YANG   +4 more
doaj   +1 more source

Clutter Suppression Method for Off-Grid Effects Mitigation in Airborne Passive Radars with Contaminated Reference Signals. [PDF]

Sensors (Basel), 2021
Deng Y, Li W, Zhang S, Wang F, Xiao W, Cui Z.   +5 more
europepmc   +1 more source

Clutter Suppression For Moving Targets Detection With Wideband Radar

, 2011
Electrical Engineering, Mathematics and Computer ...
Le Chevalier, F. (author), Krasnov, O.A. (author), Deudon, F. (author), Bidon, S. (author)   +3 more
openaire   +3 more sources

Detecting Plateau Zokor (Eospalax baileyi) Mounds in UAV Imagery of Alpine Meadows Using Deep Learning Algorithms

Remote Sensing in Ecology and Conservation, EarlyView.
We developed PZM‐YOLO to automatically detect plateau zokor mounds in UAV imagery of alpine meadows. The model achieved reliable detection of small and densely distributed mounds under complex backgrounds, outperforming the baseline YOLOv5s. This framework supports mound counting, mound position, rodent impact assessment, and grassland restoration ...
Yang Yang, Limin Hua, Lianguo Wang, Jiazhen Li, Rui Dong, Siwei Yang   +5 more
wiley   +1 more source

Clutter Suppression for Indoor Self-Localization Systems by Iteratively Reweighted Low-Rank Plus Sparse Recovery. [PDF]

Sensors (Basel), 2021
Sánchez-Pastor J, Miriya Thanthrige USKP, Ilgac F, Jiménez-Sáez A, Jung P, Sezgin A, Jakoby R.   +6 more
europepmc   +1 more source

Directive Antenna Clutter Loss in Slant Paths

International Journal of Satellite Communications and Networking, EarlyView.
ABSTRACT This paper investigates the development of a clutter loss model specifically for slant paths involving directive antennas. Conventionally, clutter loss is characterized by using isotropic antennas to facilitate standard link budget calculations via single antenna gain values.
Fernando Pérez Fontán, Vicente Pastoriza‐Santos, Fernando Machado Domı́nguez, Thomas Prechtl, Pavel Pechac   +4 more
wiley   +1 more source