Results 11 to 20 of about 45,007 (228)
A study on characteristic indexes of railway ballast bed under high-frequency radar [PDF]
Railway Sciences, 2023 Purpose – In this paper, a high-frequency radar test system was used to collect the data of clean ballast bed and fouled ballast bed of ballasted tracks, respectively, for a quantitative evaluation of the condition of railway ballast bed.
Shilei Wang +4 more
doaj +1 more source
Automatic modulation classification of noise‐like radar intrapulse signals using cascade classifier
ETRI Journal, 2021 Automatic modulation classification is essential in radar emitter identification. We propose a cascade classifier by combining a support vector machine (SVM) and convolutional neural network (CNN), considering that noise might be taken as radar signals ...
Xianpeng Meng +4 more
doaj +1 more source
Sensors, 2022 In this study, a feature analysis and extraction method was proposed for specific emitter identification based on the signal generation mechanisms of radar transmitters. The generation of radar signals by radar transmitters was analyzed theoretically and
Yilin Liu +4 more
doaj +1 more source
COMPARISON OF THE IMPULSE AND M-SEQUENCE UWB RADAR SYSTEMS FOR THE ESTIMATION OF THE WALL THICKNESS [PDF]
Acta Electrotechnica et Informatica, 2019 In our laboratory, we developed a simple estimation of the wall thickness by the UWB (Ultra Wide-Band) radar system. The described technique measures the wall thickness in the two steps. The first step is a measurement of the wall relative permittivity.
Miroslav REPKO, Ján GAMEC
doaj +1 more source
ETRI Journal, 2021 Multi‐carrier waveforms have several advantages over single‐carrier waveforms for radar communication. Employing multi‐carrier complementary phase‐coded (MCPC) waveforms in radar applications has recently attracted significant attention.
Channapatna Gopalkrishna Raghavendra +2 more
doaj +1 more source
Review of Ground Penetrating Radar Applications for Water Dynamics Studies in Unsaturated Zone
Remote Sensing, 2022 For water dynamics investigation in unsaturated (vadose) zones, ground penetrating radar is a popular hydro-geophysical method because it is non-invasive for soil, has high resolution and the results have a direct link with water content.
Minghe Zhang +9 more
doaj +1 more source
Terrain analysis using radar shape-from-shading [PDF]
, 2003 This paper develops a maximum a posteriori (MAP) probability estimation framework for shape-from-shading (SFS) from synthetic aperture radar (SAR) images.
Bors, A G, Hancock, E R, Wilson, R C
core +3 more sources
Envelope Correction of Micro-Motion Targets in the Terahertz ISAR Imaging
Sensors, 2018 Motion compensation is a crucial step to inverse synthetic aperture radar imaging, and envelope correction is the foundation of motion compensation.
Qi Yang +4 more
doaj +1 more source
Analysis of Direction Finding Performance of Interferometer for Frequency Division Orthogonal MIMO Radar [PDF]
Hangkong bingqiThe spatially synthesized signal pulse of the frequency division orthogonal MIMO radar has the characteristics of time-varying envelope and space-time coupling, which provides a new possibility for actively countering direction finding of the passive ...
Feng Yilun, Jiang Yanwen, Zeng Guilan, Fan Hongqi
doaj +1 more source
An Efficient Translational Motion Compensation Approach for ISAR Imaging of Rapidly Spinning Targets
Remote Sensing, 2022 For inverse synthetic aperture radar (ISAR) imaging of rapidly spinning targets, the large migration through range cells (MTRC) results in weak coherence between adjacent echoes, which makes the conventional envelope alignment method unable to be applied.
Shenghui Yang +4 more
doaj +1 more source