Zobrazeno 1 - 10
of 102
pro vyhledávání: '"A. C. R. MEDEIROS"'
Autor:
Maria C. R. Medeiros, Ricardo Avó, Paula Laurˆencio, Noélia S. Correia, Alvaro Barradas, Henrique J. A. da Silva, Izzat Darwazeh, John E. Mitchell, Paulo M. N. Monteiro
Publikováno v:
Journal of Telecommunications and Information Technology, Iss 1 (2023)
This paper introduces the basic operational concepts of the RoFnet – reconfigurable radio over fiber network, which is a project supported by the Portuguese Foundation forScience and Technology. This project proposes an innovative radio over fiber
Externí odkaz:
https://doaj.org/article/404cba624199478798c5670ba60f4e8f
Publikováno v:
IEEE Photonics Technology Letters. 34:757-760
Autor:
Beatriz M. Oliveira, Jorge H. Silva, Manuel S. Neves, Fernando P. Guiomar, Maria C. R. Medeiros, Paulo P. Monteiro
Publikováno v:
2023 Optical Fiber Communications Conference and Exhibition (OFC).
Considering an unamplified 4 00ZR-compatible system, we experimentally demonstrate that the reverse Maxwell-Boltzmann distribution significantly enhances PCS performance. With bit-rate adaptation down to 250 Gbps, we find power budget gains of more t
Publikováno v:
IEEE Photonics Technology Letters. 33:1383-1386
With the standardization of 400ZR driving the focus on coherent pluggables for short-reach applications, cost-effective links must be deployed. A way to achieve this is by removing the optical amplification; however, this exacerbates the impact of a
Publikováno v:
Optics express. 30(23)
With the increasing data rate requirements on short-reach links, the recent standardization of unamplified coherent optical systems is paving the way for a cost and power-effective solution, targeting a massive deployment in the near future. However,
Autor:
Ana L. G. Mestre, Pedro M. C. Inácio, Youssef Elamine, Sanaz Asgarifar, Ana S. Lourenço, Maria L. S. Cristiano, Paulo Aguiar, Maria C. R. Medeiros, Inês M. Araújo, João Ventura, Henrique L. Gomes
Publikováno v:
Frontiers in Neural Circuits, Vol 11 (2017)
Astrocytes are neuroglial cells that exhibit functional electrical properties sensitive to neuronal activity and capable of modulating neurotransmission. Thus, electrophysiological recordings of astroglial activity are very attractive to study the dy
Externí odkaz:
https://doaj.org/article/d544e41fc958498f9faa9e2b0e4e8cac
Publikováno v:
2022 13th International Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP).
Autor:
Beatriz M. Oliveira, Manuel S. Neves, Fernando P. Guiomar, Maria C. R. Medeiros, Paulo P. Monteiro
Using end-to-end deep learning, we experimentally demonstrate the optimized design of geometric constellation shaping for coherent unamplified links. A power budget gain of more than 2 dB is demonstrated for 8-ary constellations.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::512985de9f6637745c557fcc520ed49c
Autor:
Abel Lorences-Riesgo, Nelson J. Muga, Paulo P. Monteiro, Fernando P. Guiomar, Artur Sousa, Maria C. R. Medeiros, Antônio Lúcio Teixeira
Publikováno v:
Journal of Lightwave Technology. 38:394-400
We experimentally evaluate the performance of Kramers–Kronig (KK) receivers for free-space optical transmission. We transmit a dual-carrier signal, each carrier modulated as a 25 Gbaud 16/32 quadrature-amplitude modulation (QAM) signal. This dual-c
Autor:
Pedro A. Loureiro, Vinicius N. H. Silva, Maria C. R. Medeiros, Fernando P. Guiomar, Paulo P. Monteiro
Publikováno v:
Optics Express. 30:36025
In this work, we propose and experimentally demonstrate an entropy loading technique based on probabilistic constellation shaping for a visible light communication (VLC) system. The aggregated achievable bit rate of a multi-carrier signal is maximize