Results 21 to 30 of about 127,490,332 (269)

Multi-Aircraft Formation Recognition Method of Over-the-Horizon Radar Based on Deep Transfer Learning

open access: yesIEEE Access, 2022
Over-the-horizon radar (OTHR) is an important equipment for the ultralong-range early warning in the military, but the use of constant false-alarm rate (CFAR), which is a traditional detection method, makes it difficult in multi-aircraft formation ...
Futai Liang   +4 more
doaj   +1 more source

Experimental Study on Shortwave Communication and OTHR Integrated System Based on OFDM Waveform

open access: yesLeida xuebao, 2012
Based on the recently developed active-passive multifunctional all-digital HF surface wave radar hardware platform of Wuhan University, an experiment study of integrated technology for shortwave communication and Over-The-Horizon Radar (OTHR) application
Shao Qi-hong   +4 more
doaj   +1 more source

Sky‐wave over‐the‐horizon radar simulation tool [PDF]

open access: yesIET Radar, Sonar & Navigation, 2020
This work deals with the entire process of target detection and ranging by a sky‐wave over‐the‐horizon radar (OTHR) computational model simulation. The different processing stages of the transmitted signal along its space–time trajectory from transmission to digital signal processing are modelled.
Saavedra, Zenon   +3 more
openaire   +2 more sources

Experimental Research of HF Passive Radar Based on DRM Digital AM Broadcasting [PDF]

open access: yesLeida xuebao, 2012
This paper gives the experimental research of HF Passive Bistatic Radar (HFPBR) based on Digital Radio Mondiale (DRM) digital AM broadcasting that have been first carried out in China, using the newly-developed all-digital active/passive integrated HF ...
Wan Xian-rong   +5 more
doaj   +3 more sources

Correlation between the Orientation of Cross-Field Axes of Small-Scale Anisotropic Irregularities in Midlatitude Ionosphere and Drift Direction in the F Region

open access: yesИзвестия высших учебных заведений России: Радиоэлектроника, 2019
Introduction. It has been previously reported that small-scale irregularities (SSI) in the polar ionosphere are elongated along the magnetic field and anisotropic in its cross-field direction.
Valery A. Panchenko   +2 more
doaj   +1 more source

Acceleration of parasitic multistatic radar system using GPGPU [PDF]

open access: yes, 2011
This dissertation details the implementation of PMR [Parasitic Multistatic Radar] signal processing chain in the GPGPU [General Purpose Graphic Processing Units] platform.
John, Mathew
core   +1 more source

Over-the-horizon aircraft detection using skywave AM-radio broadcast signals

open access: yes, 2015
We present the preliminary experimental results of a collaborative research project to determine the feasibility of using AM-radio broadcasts of opportunity for aircraft detection at ranges of thousands of kilometers from a terrestrial receiver.
Ng, B.   +4 more
core   +1 more source

A Cognitive Beamforming Method via Range-Doppler Map Features for Skywave Radar

open access: yesRemote Sensing, 2022
For skywave over-the-horizon radar, beamforming techniques are often used to suppress airspace radio frequency interference because the high-frequency band is shared by many devices.
Zhenshuo Lei   +4 more
doaj   +1 more source

Performance Comparison between Deep Learning and Optical Flow-Based Techniques for Nowcast Precipitation from Radar Images

open access: yesForecasting, 2020
In this article, a nowcasting technique for meteorological radar images based on a generative neural network is presented. This technique’s performance is compared with state-of-the-art optical flow procedures.
Marino Marrocu, Luca Massidda
doaj   +1 more source

The structure of the construction of a radar receiver for over-the-horizon detection [PDF]

open access: yesEPJ Web of Conferences
The article provides information on the tasks of the over-thehorizon detection system, provides brief information on over-the-horizon radars of Russia. The foreign experience of building over-the-horizon detection systems is analyzed.
Litvinov Svyatsolav   +2 more
doaj   +1 more source

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