Results 31 to 40 of about 30,133 (218)

Predicting the bearing capacity of forest roads using a radar sounding

open access: yesSilva Fennica, 1982
Good correlation between radar reflection depth when using a FM-CW radar during winter and bearing capacity measurements during spring breakup was found.
Saarilahti, Martti
doaj   +1 more source

Air-borne linear frequency modulation range interrupted continuous-wave SAR for high-resolution imaging

open access: yesThe Journal of Engineering, 2019
To avoid two apertures adopted in air-borne continuous-wave (CW) synthetic aperture radar (SAR) systems, the novel air-borne linear frequency modulation range interrupted continuous wave (LFMRICW) SAR imaging mode is presented here.
Wei Xu   +5 more
doaj   +1 more source

Time-frequency represetation of radar signals using Doppler-Lag block searching Wigner-Ville distribution [PDF]

open access: yes, 2018
Radar signals are time-varying signals where the signal parameters change over time. For these signals, Quadratic Time-Frequency Distribution (QTFD) offers advantages over classical spectrum estimation in terms of frequency and time resolution but it ...
Hamdi, Muhammad Noor Muhammad   +1 more
core   +3 more sources

Doppler Factor in the Omega-k Algorithm for Pulsed and Continuous Wave Synthetic Aperture Radar Raw Data Processing

open access: yesApplied Sciences, 2023
Synthetic aperture radar (SAR) raw data do not have a direct application; therefore, SAR raw signal processing algorithms are used to generate images that are used for various required applications.
Jhohan Jancco-Chara   +4 more
doaj   +1 more source

SFCW Radar with an Integrated Static Target Echo Cancellation System

open access: yesSensors, 2021
Continuous Wave (CW) radars systems, especially air-coupled Ground-Penetrating Radar (GPR) or Through-Wall Imaging Radar (TWIR) systems, echo signals reflected from a stationary target with high energy, which may cause receiver saturation. Another effect
Danijel Šipoš, Dušan Gleich
doaj   +1 more source

Experimental analysis of multistatic multiband radar signatures of wind turbines [PDF]

open access: yes, 2016
This study presents the analysis of recent experimental data acquired using two radar systems at S-band and X-band to measure simultaneous monostatic and bistatic signatures of operational wind turbines near Shrivenham, UK.
Balleri, Alessio   +3 more
core   +2 more sources

Extended Noise Analysis Model of CW-type Radar Sensors with IQ Down-Conversion [PDF]

open access: yesRadioengineering, 2018
CW-type structures belong to the most frequently employed radars, especially in a form of small sensors used, for example, in security applications or automotive industry.
V. Jenik, P. Hudec, P. Panek
doaj  

Design of Dual-Mode Local Oscillators Using CMOS Technology for Motion Detection Sensors

open access: yesSensors, 2018
Recently, studies have been actively carried out to implement motion detecting sensors by applying radar techniques. Doppler radar or frequency-modulated continuous wave (FMCW) radar are mainly used, but each type has drawbacks.
Keum-Won Ha   +3 more
doaj   +1 more source

Incorporation of Digital Modulation into Vital Sign Detection and Gesture Recognition Using Multimode Radar Systems

open access: yesSensors, 2023
The incorporation of digital modulation into radar systems poses various challenges in the field of radar design, but it also offers a potential solution to the shrinking availability of low-noise operating environments as the number of radar ...
Michael C. Brown, Changzhi Li
doaj   +1 more source

Influence of switching-waveform characteristics on the performance of a single-layer-phase switched screen [PDF]

open access: yes, 2002
Conventional microwave-absorbing materials rely on the absorption and conversion into heat, of the electromagnetic energy incident upon them. In an alternative approach, the phase-switched screen (PSS) applies phase modulation to the reflected signal so ...
Chambers, B., Tennant, A.
core   +1 more source

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