Results 1 to 10 of about 44,798 (233)

Improving radar performance with constant envelope multi-level chirp

open access: diamondTehnički Glasnik, 2019
M-level Continuous Phase Chirp Modulation is considered for data transmission. In this article, we would like to propose a new approach to transmitting information with the help of multi-level wave guide signaling. The main problem with the classic chirp
Farhad Bahadori-Jahromi   +1 more
doaj   +3 more sources

ENVELOPE FLUCTUATIONS DISTRIBUTION OF SIMPLE RADAR PULSE BACKSCATTERING IN RARIFIED MEDIUM

open access: diamondНаучный вестник МГТУ ГА, 2018
The basis of modern radar techniques is the direct use of radio-physical data on the power of backscattering. At the same time, the data volume received from the radar allows us to form new estimates and essentially specify classical ones.
D. A. Denisenkov   +2 more
doaj   +4 more sources

Advancing Remote Life Sensing for Search and Rescue: A Novel Framework for Precise Vital Signs Detection via Airborne UWB Radar [PDF]

open access: yesSensors
Non-contact vital signs detection of the survivors based on bio-radar to identify their life states is significant for field search and rescue. However, when transportation is interrupted, rescue workers and equipment are unable to arrive at the disaster
Yu Jing   +6 more
doaj   +2 more sources

A Systemic Pathophysiological View of Sensitive Skin Revealed by Proteomics: Beyond Barrier and Inflammation. [PDF]

open access: yesJ Cosmet Dermatol
ABSTRACT Background Sensitive skin (SS) is a common dermatological condition characterized by enhanced reactivity to environmental, chemical, and cosmetic stimuli, often accompanied by impaired barrier function and discomfort sensation such as burning or itching.
Guihua L   +4 more
europepmc   +2 more sources

Photonics-Based Multifunction System for Radar Signal Transmit-Receive Processing and Frequency Measurement [PDF]

open access: yesMicromachines
A novel photonic-assisted multifunctional radar system was proposed and experimentally investigated. This system can simultaneously achieve frequency-doubled linear frequency modulation (LFM) signal generation, de-chirp reception, self-interference ...
Dengcai Yang   +4 more
doaj   +2 more sources

Frequency Discrimination Method Using Asymmetric Transmission Time in FSK Radar [PDF]

open access: yesJournal of Electromagnetic Engineering and Science, 2022
A frequency discrimination method based on transmission time control is proposed for effective absolute distance measurement using frequency-shift keying (FSK) radar. In FSK radar, each frequency is transmitted for different durations using an asymmetric
Jae Young Sim, Jong-Ryul Yang
doaj   +1 more source

A study on characteristic indexes of railway ballast bed under high-frequency radar [PDF]

open access: yesRailway 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

open access: yesETRI 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

Feature Analysis and Extraction for Specific Emitter Identification Based on the Signal Generation Mechanisms of Radar Transmitters

open access: yesSensors, 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]

open access: yesActa 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

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