Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Boris Dortschy"'
Autor:
Johelden Bezerra, Aldebaro Klautau, Marcio Monteiro, Evaldo Pelaes, Eduardo Medeiros, Boris Dortschy
Publikováno v:
EURASIP Journal on Advances in Signal Processing, Vol 2010 (2010)
There are many spectrum balancing algorithms to combat the deleterious impact of crosstalk interference in digital subscriber lines (DSL) networks. These algorithms aim to find a unique operating point by optimizing the power spectral densities (PSDs
Externí odkaz:
https://doaj.org/article/c090b9e4ca51402dafcc94ee40d8a901
Autor:
Neiva Lindqvist, Fredrik Lindqvist, Marcio Monteiro, Boris Dortschy, Evaldo Pelaes, Aldebaro Klautau
Publikováno v:
EURASIP Journal on Advances in Signal Processing, Vol 2010 (2010)
The development and assessment of spectrum management methods for the copper access network are usually conducted under the assumption of accurate channel information. Acquiring such information implies, in practice, estimation of the crosstalk coupl
Externí odkaz:
https://doaj.org/article/57ee68c5fcda47c487f723c5b5dee460
Publikováno v:
IEEE Communications Letters. 24:2034-2037
We propose an SNR estimation procedure for systems that transmit frequency-multiplexed analog signals in a channel. It is agnostic to the type of radio signal transmitted, can be performed without increasing the required bandwidth, and without interr
Autor:
David Patel, Eslam El-Fiky, David V. Plant, Mathieu Chagnon, Alireza Samani, Stephane Lessard, Fabio Cavaliere, Ramon Gutierrez-Castrejon, Gemma Vall-Llosera, Boris Dortschy, Ghulam Saber, Patryk Urban, Rui Li, Mohamed Morsy-Osman
Publikováno v:
Optics Communications. 450:48-60
Providing a low-cost, reliable and end-to-end quality of service (QoS) guaranteed connectivity is going to be a major challenge in optical transport due to the immense growth in number of connected devices and traffic volume triggered by fifth-genera
Autor:
Zhenping Xing, Luhua Xu, Stephane Lessard, Fabio Cavaliere, Eslam El-Fiky, Alireza Samani, Patryk Urban, Ghulam Saber, Boris Dortschy, Gemma Vall-Llosera, Mohamed Morsy-Osman, Samiul Alam, Kh Arif Shahriar, David V. Plant, David Patel
Publikováno v:
IEEE Photonics Technology Letters. 31:799-802
We demonstrate 25 and 50 Gb/s four-level pulse amplitude modulation (PAM-4) transmission over 43- and 21-km standard single-mode fiber (SMF), respectively, using a silicon photonic 120° hybrid-based integrated simplified coherent receiver in the $C$
Autor:
Eslam El-Fiky, Patryk Urban, Stephane Lessard, Md. Ghulam Saber, David V. Plant, Boris Dortschy, Fabio Cavaliere, Mohamed Morsy-Osman, Gemma Vall-Llosera, Michael Hui
Publikováno v:
IEEE Photonics Technology Letters. 30:1547-1550
We demonstrate 25-Gbit/s four-level pulse amplitude modulation transmission over 28-km standard single-mode fiber using an off-the-shelf 10-Gbit/s electro-absorption modulated laser and a 3 × 3 fiber splitter based simplified coherent receiver in th
Autor:
Eslam El-Fiky, Boris Dortschy, Gemma Vall-Llosera, David Patel, David V. Plant, Patryk Urban, Mohamed Morsy-Osman, Ghulam Saber
Publikováno v:
2017 Photonics North (PN).
A 120° optical hybrid based on 3× multimode interference coupler is reported. The device exhibits less than 10° phase deviation over 55 nm in the C- and L-band.
Publikováno v:
International Journal of Communication Systems. 29:194-209
This work describes and proposes the application of evolutionary algorithms on the multiuser spectrum and SNR margin optimization problem for multicarrier systems, such as digital subscriber line. The proposed method is designed such that it takes ad
Autor:
Eslam El-Fiky, Boris Dortschy, Kh Arif Shahriar, Alireza Samani, David V. Plant, David Patel, M. S. Alam, Gemma Vall-Llosera, Fabio Cavaliere, Stephane Lessard, Zhenping Xing, Maxime Jacques, Patryk Urban, Mohamed Osman, Md. Ghulam Saber
Publikováno v:
Optics Express. 26:31222
We demonstrate the first simplified coherent receiver using a 120° hybrid on silicon-on-insulator (SOI) for high speed PON applications. This coherent receiver integrates an inverse taper edge coupler for the received signal, a vertical grating coup
Publikováno v:
IEEE Transactions on Signal Processing. 58:3717-3727
Digital subscriber lines (DSLs) technology is vastly used for high-speed data transmission. Crosstalk is one of the main problems in DSL. The research community has done extensive work on how to optimize spectrum allocation across DSL frequencies and