Zobrazeno 1 - 10
of 111
pro vyhledávání: '"Pavel Lafata"'
Publikováno v:
Acta Polytechnica, Vol 58, Iss 6, Pp 388-394 (2018)
Today, passive optical networks (PONs) represent a modern solution for high-speed FTTx subscriber lines and networks. Due to the fact that optical fibres and cables are deployed in last-mile network segments. Unfortunately, the costs of trenching and
Externí odkaz:
https://doaj.org/article/a4fb23b10a4e42ea9fc9b15dfe7a2819
Autor:
Tomas Pehnelt, Pavel Lafata
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 15, Iss 5, Pp 866-876 (2017)
Various approaches and methods are used for designing of optimum deployment of Passive Optical Networks (PON) according to selected optimization criteria, such as optimal trenching distance, endpoint attenuation and overall installed fibre length. Th
Externí odkaz:
https://doaj.org/article/26da337fb10c4367af8655565df85ef2
Autor:
Pavel Lafata
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 13, Iss 2, Pp 147-155 (2015)
Recently, a new xDSL successor called G.fast, which can occupy frequencies up to 106 or 212~MHz, has been introduced in ITU-T G.9700 series of recommendations. Moreover, a new model of transmission characteristics suitable for various types of metall
Externí odkaz:
https://doaj.org/article/0512be656ff1444eb2d1238711848616
Autor:
Tomas Zeman, Pavel Lafata
Publikováno v:
2022 31st Annual Conference of the European Association for Education in Electrical and Information Engineering (EAEEIE).
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e52ddc197c70e55ecf42b10e96026e1
https://doi.org/10.1109/eaeeie54893.2022.9820382
https://doi.org/10.1109/eaeeie54893.2022.9820382
Autor:
Pavel Lafata
Publikováno v:
International Journal of Advances in Telecommunications, Electrotechnics, Signals and Systems, Vol 2, Iss 1, Pp 27-32 (2013)
This article proposes an innovative method for protecting of passive optical networks (PONs), especially the central optical unit – optical line termination (OLT). PON networks are typically used in modern high-speed access networks, but there are
Externí odkaz:
https://doaj.org/article/00d84f0bcd49445989a04c9057e97360
Autor:
Pavel Lafata
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 11, Iss 3, Pp 193-203 (2013)
Modern Very-High Speed Digital Subscriber Lines (VDSL2) can potentially increase the transmission rates in access networks up to tens of Mbps in both directions. However, the real transmission performance of VDSL2 technology is heavily influenced by
Externí odkaz:
https://doaj.org/article/2b6d345c8cb446a5b6926fa2897977a3
Autor:
Pavel Lafata
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 11, Iss 1, Pp 36-45 (2013)
The deployment of passive optical networks (PONs) is slow today, especially in Europe, because completely new optical infrastructures are necessary to be installed in the last-mile segments of access networks, which is always very expensive process.
Externí odkaz:
https://doaj.org/article/38e641d0e6b5434b9c9ffa55a86fb9a4
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 11, Iss 5, Pp 336-341 (2013)
The first part of our paper brings the description and analysis of method used for modeling of metallic cable’s parameters according to the modified KPN model. Moreover we were able to perform measurements and estimations for real metallic cable’
Externí odkaz:
https://doaj.org/article/a5ba3a97c71a4c2ab313d8e421013d35
Autor:
Jiri Vodrazka, Pavel Lafata
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 11, Iss 4, Pp 260-265 (2013)
Certain multimedia and voice services, such as VoIP, IPTV, etc., are significantly delay sensitive and their performance is influenced by the overall transmission delay and its variance. One of the most common solutions used in access networks are xD
Externí odkaz:
https://doaj.org/article/bc379ee75f364cbdbb7adb50b83bb15f
Publikováno v:
Advances in Electrical and Electronic Engineering, Vol 10, Iss 4, Pp 224-228 (2012)
The paper describes the measuring and modeling of attenuation and near-end crosstalk for a specific metallic cable in a frequency band up to 1 GHz. The paper also includes primary transmission parameters of this cable, which consists of four twisted
Externí odkaz:
https://doaj.org/article/9099146e8e064f958cac05c18e7dd0d0