Zobrazeno 1 - 10
of 87
pro vyhledávání: '"Otakar Wilfert"'
Autor:
Lucie Dordov ́a, Otakar Wilfert
Publikováno v:
Journal of Telecommunications and Information Technology, Iss 2 (2023)
This work is focused on the atmospheric turbulence effect and a new method for determining optical signal attenuation caused by turbulence is presented here. A new method of power budget of optical links comes from optical intensity distribution in a
Externí odkaz:
https://doaj.org/article/467477a643654b059e84172dbb1c1d69
Autor:
Peter Barcik, Otakar Wilfert
Publikováno v:
OPTICS EXPRESS. 2022, vol. 30, issue 22, p. 40196-40207.
The paper presents experimental verification of coexistence and entry into a free space optical link channel. A numerical model, which describes the properties of the LOS (Line of Sight) channel and NLOS (Non-Line of Sight) channel, was formulated an
Publikováno v:
2022 32nd International Conference Radioelektronika (RADIOELEKTRONIKA).
Publikováno v:
Optical Switching and Networking. 33:161-168
This paper presents three major Visible Light Communication (VLC) transmitter LED detection techniques and proposes a new detection method based on the fusion of their outputs. Statistics of each detection technique are used to estimate their outputs
Autor:
Ales Dobesch, Erich Leitgeb, Zdenek Kolka, Otakar Wilfert, Marek Novak, Lucie Hudcova, Peter Barcik
Publikováno v:
Physical Communication. 31:212-217
The new generation of Free-Space Optical systems utilizes photonic components used in optical fiber communications which demand high precision and complexity of the system. We present an analysis of the laser beam propagation in the context of fully
Autor:
Lucie Hudcova, Otakar Wilfert
Publikováno v:
2021 20th International Conference on Microwave Techniques (COMITE).
This work is focused on the calculation of the specific attenuation of the underwater environment based on the concentration of phytoplankton. We present the parameter specific attenuation level, which is related to the maximum range of the optical u
Publikováno v:
2021 20th International Conference on Microwave Techniques (COMITE).
The paper deals with analyzing possible security risks for Free Space Optics (FSO) communication systems caused by a non-line of sight (NLOS) scattering channel. The higher concentration of scattering particles in the atmosphere leads to increasing s
Publikováno v:
2020 New Trends in Signal Processing (NTSP).
The paper deals with the statistical analysis of output signals of a solid-state photomultiplier with capacitive-coupled pixels. The photomultiplier represents an array of parallel-connected avalanche photodiodes with integrated quenching resistors.
Autor:
Lucie Hudcova, Otakar Wilfert
Publikováno v:
2020 30th International Conference Radioelektronika (RADIOELEKTRONIKA).
This work is focused on determination of applicability of modified Equivalent Temperature Gradient method. Furthermore, the paper defines the relationship between the refractive index structural parameter and the modified Equivalent Temperature Gradi
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
In visible light communication (VLC) the optical digital to analog conversion (ODAC) approach was proposed as a suitable driving technique able to overcome light-emitting diode’s (LED) non-linear characteristic. This concept is analogous to an elec