Results 21 to 30 of about 66,735 (286)
GLRT receivers for UWB systems [PDF]
IEEE Communications Letters, 2005 This letter investigates generalized-likelihood-ratio-test (GLRT) detectors for ultra-wideband (UWB) impulse radio systems employing two alternative signaling schemes. One is the so-called transmitted reference method where, in each time frame, a reference pulse is transmitted prior to the data pulse. The other is the differential transmitted reference
D'AMICO, ANTONIO ALBERTO +1 more
openaire +1 more source
Parents of two-phase flow and theory of “gas-lift”
EPJ Web of Conferences, 2014 This paper gives a brief overview of types of two-phase flow. Subsequently, it deals with their mutual division and problems with accuracy boundaries among particular types.
Zitek Pavel, Valenta Vaclav
doaj +1 more source
Design of personnel positioning system for fully mechanized coal face with low power consumption
Meikuang Anquan, 2023 Most of the existing accurate positioning systems for underground personnel adopt UWB positioning technology, which is based on the layout mode of personnel positioning card + positioning substation to achieve centimeter-level high precision positioning.
Xian CHEN, Shu ZHOU
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A Compact Ultra-Wideband Chip Antenna with Bandwidth Extension Patch and Simple Isolator for MIMO Systems for Mobile Handheld Terminals [PDF]
Journal of Electromagnetic Engineering and Science, 2022 A compact ultra-wideband (UWB) chip antenna that has high isolation for multi-input multi-output (MIMO) systems is presented in this paper. The antenna is composed of a chip antenna, a printed circuit board, and an isolator stub.
Jung-Nam Lee +2 more
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Joint distribution of polarization-multiplexed UWB and WiMAX radio in PON [PDF]
, 2009 In this paper, the feasibility of the joint distribution of ultra-wideband (UWB) and WIMAX wireless using polarization multiplexing as a coexistence technique is proposed and experimentally demonstrated within the framework of passive optical networks ...
Roberto Llorente +7 more
core +1 more source
Solution of heat removal from nuclear reactors by natural convection
EPJ Web of Conferences, 2014 This paper summarizes the basis for the solution of heat removal by natural convection from both conventional nuclear reactors and reactors with fuel flowing coolant (such as reactors with molten fluoride salts MSR).The possibility of intensification of ...
Zitek Pavel, Valenta Vaclav
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Research on positioning algorithm of electric mine shovel based on UWB technology
Gong-kuang zidonghua, 2020 In the harsh working environment of mines, the traditional cable reeling method cannot guarantee the power supply of electric shovel for a long time, and there are hidden safety hazards in the process of power supply.
GUO Anbin, SU Hongjun, YAN Xiaoheng
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Band Notch Characteristics Reconfigurable UWB Leaf Shape Monopole Antenna [PDF]
International Journal of Electronics and Telecommunications, 2022 In this paper a band notch characteristics reconfigurable UWB leaf shape monopole antenna is reported. The proposed antenna size is 42×32×1.6 mm3 and simulated S11 -10dB impedance bandwidth is from 2.1 to 13.0 GHz.
Pachiyaannan Muthusamy +3 more
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Various methods to improve heat transfer in exchangers
EPJ Web of Conferences, 2015 The University of West Bohemia in Pilsen (Department of Power System Engineering) is working on the selection of effective heat exchangers. Conventional shell and tube heat exchangers use simple segmental baffles.
Pavel Zitek, Vaclav Valenta
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Wireless software upgrade method based on broadcast mode
Meikuang Anquan, 2021 This paper proposes an implementation scheme of wireless upgrade firmware program based on UWB and ZigBee technologies. This method adopts one-to-many networking mode and infinite loop multi-broadcast mechanism to realize the location card batch ...
WANG Fei
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