Results 21 to 30 of about 847,355 (293)

Stochastic Multipath Model for the In-Room Radio Channel based on Room Electromagnetics [PDF]

open access: yes, 2018
We propose a stochastic multipath model for the received signal for the case where the transmitter and receiver, both with directive antennas, are situated in the same rectangular room.
Pedersen, Troels
core   +2 more sources

Experimental Characterization of Millimeter-Wave Indoor Propagation Channels at 28 GHz

open access: yesIEEE Access, 2018
The increasing requirement for the mobile data traffic accelerates the research of millimeterwave (mm-wave) for future wireless systems. Accurate characterization of the mm-wave propagation channel is fundamental and essential for the system design and ...
Guojin Zhang   +6 more
doaj   +1 more source

A Wideband Channel Model for Body Area Networks in Circular Metallic Indoor Environments

open access: yesIEEE Access, 2021
In this paper, the wideband characterization of the propagation channel in circular metallic indoor environments is addressed, regarding Body Area Networks and 5G small cells, an analytical model for the dependence of the mean delay and the average delay
Filipe D. Cardoso   +3 more
doaj   +1 more source

Low-Jitter Clock Multiplication: a Comparioson between PLLs and DLLs [PDF]

open access: yes, 2002
This paper shows that, for a given power budget, a practical phase-locked loop (PLL)-based clock multiplier generates less jitter than a delay-locked loop (DLL) equivalent. This is due to the fact that the delay cells in a PLL ring-oscillator can consume
Beek, Remco C.H. van de   +3 more
core   +2 more sources

Utilization of an OLED-Based VLC System in Office, Corridor, and Semi-Open Corridor Environments

open access: yesSensors, 2020
Organic light emitting diodes (OLEDs) have recently received growing interest for their merits as soft light and large panels at a low cost for the use in public places such as airports, shopping centers, offices, and train or bus stations. Moreover, the
Zahra Nazari Chaleshtori   +4 more
doaj   +1 more source

The impact of the wavelet propagation distribution on SEIRS modeling with delay. [PDF]

open access: yesPLoS ONE, 2014
Previous models of disease spread involving delay have used basic SIR (susceptible--infectious--recovery) formulae and approaches. This paper demonstrates how time-varying SEIRS (S--exposed--I - R - S) models can be extended with delay to produce wave ...
Ofosuhene O Apenteng, Noor Azina Ismail
doaj   +1 more source

Positioning Information Based High-Speed Communications with Multiple RISs: Doppler Mitigation and Hardware Impairments

open access: yesApplied Sciences, 2022
In this paper, we consider a multiple reconfigurable intelligent surface (RIS)-assisted system using positioning information (PI) to explore the potential of Doppler effect mitigation and spectral efficiency (SE) enhancement in high-speed communications (
Ke Wang, Chan-Tong Lam, Benjamin K. Ng
doaj   +1 more source

Performance degradation due to multipath noise for narrowband OFDM systems: channel-based analysis and experimental determination [PDF]

open access: yes, 2015
The performance of OFDM systems over a multipath channel can strongly degrade due to the propagation delay spread. The distortion of the received signal over the fast Fourier transform window is referred to as multipath noise.
Heereman, Frédéric   +4 more
core   +2 more sources

Measurement-based analysis of delay-Doppler characteristics in an indoor environment [PDF]

open access: yes, 2016
An analysis of delay-Doppler characteristics in the presence of moving people is presented for short-range communication in an indoor environment. Channel-sounding measurements have been carried out at 3.6 GHz in a crowded university hall during several ...
Hanssens, Brecht   +4 more
core   +1 more source

Smart receiver for visible light communications: Design and Analysis [PDF]

open access: yes, 2012
This paper presents the concept, design and analysis for a visible light communications receiver to guard against blocking and enhance mobility. Different geometrical shapes have been investigated, with two being chosen and analyzed in MATLAB for the ...
Burton, Andrew   +4 more
core   +1 more source

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