Results 1 to 10 of about 37,518 (173)

Modified Nested Barker Codes for Ultra-Wideband Signal–Code Constructions [PDF]

open access: yesSensors, 2023
Currently, various applications of ultra-wideband signal–code constructions are among the most vibrant technologies, being implemented in very different fields. The purpose of this research consists of analyzing Barker codes and searching for the optimal
Vadim A. Nenashev   +4 more
doaj   +2 more sources

Optimization of Transient Response Radiation of Printed Ultra Wideband Dipole Antennas (Using Particle Swarm Optimization Method) [PDF]

open access: yesRadioengineering, 2007
In case of particular ultra wideband applications (i.e. radar, positioning, etc.), it is crucial to know the transient responses of antennas. In the first part of the paper, the optimization process searches for the dipole shape that accomplishes two ...
M. Mazanek, P. Cerny
doaj   +2 more sources

A METHOD OF PROTECTING INFORMATION IN CYBER-PHYSICAL SPACE

open access: yesСучасні інформаційні системи, 2023
The subject of the study is the processes of ensuring the reliability and security of information in cyber-physical space. The objective is to develop recommendations for the implementation of a method of information security in cyber-physical space ...
Nataliia Dzheniuk   +4 more
doaj   +1 more source

Signal Processing Algorithm for Monopulse Noise Noncoherent Wideband Helicopter Altitude Radar

open access: yesComputation, 2022
Radio altimeters are an important component of modern helicopter on-board systems. These devices currently involve the use of narrowband deterministic signals, that limits their potential technical characteristics.
Valeriy Volosyuk   +7 more
doaj   +1 more source

Rapid Hybrid Acquisition of Ultra-Wideband Signals [PDF]

open access: yesJournal of VLSI signal processing systems for signal, image and video technology, 2006
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhang, HL, Goeckel, DL, Wei, SQ, Win, MZ
openaire   +3 more sources

Application of a short-pulse ultra-wideband probing signal for estimating reflective characteristics [PDF]

open access: yesНаучно-технический вестник информационных технологий, механики и оптики, 2021
The paper presents a method developed for processing coherent short-pulse ultra-wideband signals reflected from a certain control zone, which makes it possible to evaluate the distribution of reflective characteristics over this zone.
Marina V. Samoilenko
doaj   +1 more source

An ultra-wideband origami microwave absorber

open access: yesScientific Reports, 2022
Microwave absorbers have been used to mitigate signal interference, and to shield electromagnetic systems. Two different types of absorbers have been presented: (a) low-cost narrowband absorbers that are simple to manufacture, and (b) expensive wideband ...
Akash Biswas   +5 more
doaj   +1 more source

Antenna Delay Calibration of UWB Nodes

open access: yesIEEE Access, 2021
Impulse-radio ultra-wideband (IR-UWB) networks are gaining wide acceptance in short-to-medium range wireless sensing and positioning applications that require high accuracy. It is achieved generally via signal message exchange between ultra-wideband (UWB)
Shashi Shah   +4 more
doaj   +1 more source

Quadrature Phase Shift Keying (QPSK) Modulator Design using Multi-Port Network in Multilayer Microstrip-Slot Technology for Wireless Communication Applications [PDF]

open access: yes, 2015
The design of the quadrature phase shift keying (QPSK) modulator by using a multi-port network is proposed in this article for the use in wireless communication applications. The multi-port network is in the form of multilayer microstrip-slot technology.
Mohamed Ghazali, S. N. A., Seman, N.
core   +4 more sources

Parameter estimation of frequency shift keying radar signal intercepted by Nyquist folding receiver using periodic linear frequency modulation local oscillator

open access: yesIET Radar, Sonar & Navigation, 2021
Frequency shift keying (FSK) signal has been widely used in modern radar systems. To intercept the FSK radar signal with a high interception probability, radar reconnaissance receiver should have an ultra‐wideband receiving ability.
Zhaoyang Qiu   +5 more
doaj   +1 more source

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