Results 21 to 30 of about 500,244 (287)

Ultra‐wideband wireless communications [PDF]

open access: yesWireless Communications and Mobile Computing, 2003
AbstractUltra‐wideband (UWB) communication techniques have attracted a great interest in both academia and industry in the past few years for applications in short‐range wireless mobile systems. This is due to the potential advantages of UWB transmissions such as low power, high rate, immunity to multipath propagation, less complex transceiver hardware,
Weihua Zhuang, Xuemin Shen, Qi Bi
openaire   +1 more source

METHOD OF WIRELESS TRANSMISSION OF DIGITAL INFORMATION ON THE BASIS OF ULTRA-WIDE SIGNALS

open access: yesСучасні інформаційні системи, 2019
The subject of the study are the organization of wireless transmission of digital information based on ultra-wideband signals. The goal is the development of models and methods for organizing broadband wireless communications operating in difficult ...
Aleksandr Serkov   +2 more
doaj   +1 more source

Research on the variation law of coal electrical parameters under different temperatures and detection frequencies

open access: yesGong-kuang zidonghua, 2021
Most of the existing research on the influencing factors of coal electrical parameters are carried out under fixed frequency or low frequency and high temperature conditions.
ZHENG Xuezhao   +5 more
doaj   +1 more source

Ultra-Wideband Terahertz Absorption Using Dielectric Circular Truncated Cones

open access: yesIEEE Photonics Journal, 2019
We numerically demonstrate an ultra-wideband terahertz absorber using dielectric circular truncated cones on a non-structured graphene layer supported by a dielectric spacer on a metal reflector in the bottom.
Longfang Ye   +5 more
doaj   +1 more source

Localization of Wearable Ultra Wideband Antennas for Motion Capture Applications [PDF]

open access: yes, 2014
This paper presents a study of human body localisation using Ultra Wideband (UWB) technology. Various base station configurations, time of arrival and first peak detection algorithms are used to estimate the position of body-worn antennas.
Batchelor, John C.   +4 more
core   +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

Ultra-Wideband Teach and Repeat

open access: yesCoRR, 2022
Autonomously retracing a manually-taught path is desirable for many applications, and Teach and Repeat (T&R) algorithms present an approach that is suitable for long-range autonomy. In this paper, ultra-wideband (UWB) ranging-based T&R is proposed for vehicles with limited resources.
Mohammed Ayman Shalaby   +3 more
openaire   +3 more sources

Spatiotemporal coherent summation of Ultra-Wideband chaotic radio pulses. Experiment [PDF]

open access: yesИзвестия высших учебных заведений: Прикладная нелинейная динамика
The purpose of this work is to experimentally prove the physical feasibility of coherent addition of chaotic signals (ultra-wideband chaotic radio pulses) in space and time.
Kuzmin, Lev Viktorovich   +3 more
doaj   +1 more source

Performance evaluation of OFDM and impulse-radio ultra-wideband over fiber distribution for in-building networks [PDF]

open access: yes, 2009
This paper reports the compared performance of the two main ultra-wideband (UWB) implementations, OFDM-based (OFDM-UWB) and impulse-radio UWB, when transmitted over optical fiber for in-building communications employing external electro-optic modulation.
Roberto Llorente   +7 more
core   +1 more source

An Efficient Indoor Target Tracking Algorithm Using TDOA Measurements With Applications to Ultra-Wideband Systems

open access: yesIEEE Access, 2019
The ultra-wideband technique has shown its effectiveness for indoor target tracking. Various types of measurements have been applied to ultra-wideband systems for indoor target tracking, and the time difference of arrival (TDOA) measurement-based ...
Hyung June Kim   +4 more
doaj   +1 more source

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