Now showing items 1-20 of 210

  • 1.25-3.125 Gb/s per user PON with RSOA as phase modulator for statistical wavelength ONU 

    Chu, Guangyong; Polo Querol, Víctor; Lerín de la Santísima Trinidad, Adolfo; Tabares Giraldo, Jeison; Cano Valadéz, Iván Nicolás; Prat Gomà, Josep Joan (2015-12-15)
    Article
    Open Access
    We report a new scheme to support, cost efficiently, ultra-dense wavelength division multiplexing (UDWDM) for optical access networks. As validating experiment, we apply phase modulation of a reflective semiconductor optical ...
  • 1.3 µm SDN-enabled optical packet switch architecture for high performance and programmable data center network 

    Miao, Wang; Agraz Bujan, Fernando; De Waardt, Huug D.; Spadaro, Salvatore; Sebastian Dorren, Harm Joseph; Calabretta, Nicola (Institute of Electrical and Electronics Engineers (IEEE), 2015)
    Conference report
    Restricted access - publisher's policy
    We demonstrate a 1.3 µm port-count scalable SDN-enabled optical packet switch architecture for programmable data-center networks. Experimental assessments of a 40Gb/s 4×4 switch system with SDN-control show <10-5 packet-loss ...
  • 15-dB differential link-loss UDWDM-PON with direct beat phase modulated DFBs 

    Velásquez Micolta, Juan Camilo; Cano Valadez, Iván Nicolás; Polo Querol, Víctor; Domingo Ribé, Marc; Prat Gomà, Josep Joan (2017-11-21)
    Article
    Open Access
    IEEE A 15 dB differential link-loss ultra-dense wavelength division multiplexing passive optical network (UDWDM-PON) with two optical network units (ONU) spectrally spaced 6.25 GHz is experimentally implemented and tested. ...
  • 5G connected vehicles supported by optical fiber access 

    Lázaro Villa, José Antonio; Coves Garrido, Massiel; Sarmiento Hernández, Samael; Altabas, Jose Antonio; Lerin, Adolfo (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    Future autonomous vehicle will require a high level of computation, communication, sensing and fast response actuation. Communication among vehicles, and vehicles to infrastructure, accessing to remote systems and services ...
  • A column generation approach for large-scale RSA-based network planning 

    Ruiz Ramírez, Marc; Zotkiewicz, Mateusz; Velasco Esteban, Luis Domingo; Comellas Colomé, Jaume (Institute of Electrical and Electronics Engineers (IEEE), 2013)
    Conference report
    Restricted access - publisher's policy
    In flexgrid-based optical networks, the problem of finding optimal route and spectrum allocation (RSA) for the demands in a traffic matrix becomes harder to solve than similar problems in fixed DWDM networks, mainly due ...
  • Acotación de la probabilidad de error en un sistema de transmisión digital por fibra óptica 

    Agustí Comes, Ramon; Junyent Giralt, Gabriel (1980)
    Conference report
    Open Access
    Dans ce papier, on a obtenu des bornes inférieure et supérieure de la probabilité d 'erreur par symbole dans un systemè de transmission numérique par Fibre Optique. Pour celà, nous avons employé une simplification de la ...
  • Acotación rápida de la probabilidad de error en un sistema de transmisión digital por fibra óptica con símbolos no correlados 

    Junyent Giralt, Gabriel; Casadevall Palacio, Fernando José (Unión Científica Internacional de Radio (URSI), 1983)
    Conference report
    Open Access
    This paper deals with the problem of determinig an upper bound on the average conditional error probabilities in a digital optical fiber communication system with non-correlated symbols, in the presence of additive noise ...
  • A discrete bit loading algorithm for FBMC/OQAM 

    Caus López, Marius; Pérez Neira, Ana Isabel; García Armada, Ana (2012-06)
    Article
    Restricted access - publisher's policy
    In this letter the discrete rate maximization problem is investigated for FBMC/OQAM. The analysis reveals that if there is crosstalk certain bit allocations violate the power constraints. Aiming at ensuring the feasibility ...
  • A frequency approach on MIMO DSP for optical communication systems 

    Palou Garcia, Xavier (Universitat Politècnica de Catalunya, 2013-02-28)
    Master thesis (pre-Bologna period)
    120 months embargo
    [ANGLÈS] Spatial Division Multiplexing (SDM) has arisen during the last years as the most promising technique to overcome the increasing necessity of capacity of the communication systems while avoiding the theoretical ...
  • After failure repair optimization in dynamic flexgrid optical networks 

    Ruiz Ramírez, Marc; Zotkiewicz, Mateusz; Castro Casales, Alberto; Klinkowski, Miroslaw; Velasco Esteban, Luis Domingo; Pioro, Michal (The Optical Society (OSA), 2014)
    Conference report
    Restricted access - publisher's policy
    We introduce the problem of reoptimizing the network after a link failure has been repaired as an effective way for reducing capacity usage and improving network performance. Numerical results show gains higher than 42%.
  • Allocating multi-rate requests to single-rate lightpaths in Flexgrid optical networks 

    Comellas Colomé, Jaume; Junyent Giralt, Gabriel (Institute of Electrical and Electronics Engineers (IEEE), 2018)
    Conference report
    Restricted access - publisher's policy
    Some ideas about the effect of appropriately selecting the size of the connections conveyed by multi-rate flexgrid optical networks are discussed. The main focus is on illustrating the relation between spectrum consumption ...
  • All-optical communication system based on orthogonal frequency-division multiplexing (OFDM) and optical time-division multiplexing (OTDM) 

    Cañibano Nuñez, Héctor (Universitat Politècnica de Catalunya, 2014-05-13)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Danmarks tekniske universitet
    [ANGLÈS] We propose and demonstrate a novel principle that combines optical orthogonal frequency-division multiplexing (O-OFDM) and optical time-division multiplexing (OTDM). The principle is based on generating and ...
  • Ampliació i millora de la infraestructura de la xarxa de comunicacions de dades de Lloret de Mar 

    Boix i Marinel·lo, Alexandre (Universitat Politècnica de Catalunya, 2011-06-15)
    Master thesis (pre-Bologna period)
    Restricted access - author's decision
    El projecte que es desenvolupa a continuació, té com a objectiu l’ampliació i millora de la xarxa de comunicacions de dades de Lloret de Mar. Aquesta ampliació es basarà en la instal·lació d’un segment de fibra ...
  • A multi-tenancy model based on resource capabilities and ownership for infrastructure management 

    Garcia Espin, Joan Antoni; Ferrer Riera, Jordi; Figuerola Fernández, Sergi; López Berga, Ester (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Conference report
    Restricted access - publisher's policy
    This paper presents a multi-tenancy model based on infrastructure resource capability virtualisation. The model, namely Resources, Ownership, Roles and Actors or RORA, approaches network and IT infrastructure virtualisation ...
  • Anàlisi de redundància dels nodes d'una xarxa 

    Gomariz Gimena, Gerard (Universitat Politècnica de Catalunya, 2017-01)
    Bachelor thesis
    Restricted access - author's decision
    Covenantee:  Xarxa Oberta de Catalunya
    The main goal of this project is to provide redundancy to the nodes of a Network, in this case the Network is owned by Xarxa Oberta de Catalunya. Different aspects will be analyzed with the goal to determine if that node ...
  • Análisis del despliegue territorial de la fibra óptica en Catalunya 

    Aranda Bodelón, Eva (Universitat Politècnica de Catalunya, 2013-05-29)
    Bachelor thesis
    Restricted access - confidentiality agreement
    La fibra óptica permite la transmisión de datos mediante la luz que viaja por un medio plástico.Existen diferentes tipologías de fibras ópticas, como monomodo (la señal se propaga en un solomodo) o mutimodo (se propaga en ...
  • Analysis of back-propagation and RF pilot-tone based nonlinearity compensation for a 9x224Gb/s POLMUX-16QAM system 

    Díaz Souto, Alberto; Napoli, Antonio; Adhikari, Susmita; Maalej, Zied; Lobato Polo, Adriana P.; Kuschnerov, Maxim; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2012)
    Conference report
    Restricted access - publisher's policy
    We investigate the joint implementation of back-propagation and RF-pilot tone for fiber nonlinear compensation in POLMUX-16QAM and show that the nonlinear tolerance is drastically improved when compared to OFDM system
  • Analysis of the spectrum occupancy in elastic optical network 

    Caba Oriola, Joel (Universitat Politècnica de Catalunya, 2017-06)
    Bachelor thesis
    Open Access
    Elastic Optical Networks were proposed in response to the large capacity and diverse traffic granularity of the future Internet. Depending on the bandwidth requirements, EONs allocate an appropriate-sized spectrum to each ...
  • A novel distributed fiber-optic strain sensor 

    García Hernández, Miguel J.; Ortega Redondo, Juan Antonio; Chávez Domínguez, Juan Antonio; Salazar Soler, Jorge; Turó Peroy, Antonio (2002-08)
    Article
    Restricted access - publisher's policy
    The theory of operation of a fiber-optic-based strain sensor system, suitable for long structures, is described. The proposed sensor design is composed of several hundreds of sections separated by reflectors in order to ...
  • Application on minimizing residual AM in DPSK UDWDM-PON ONU by integrated dual-EML 

    Chu Guang, Yong; Cano Valadéz, Iván Nicolás; Polo Querol, Víctor; Prat, Josep (2016-06-01)
    Article
    Open Access
    A monolithically integrated dual electroabsorption modulated laser (DEML), consisting of distributed feedback laser (DFB) and electroabsorption modulator (EAM) sections, is proposed as a transmitter in an optical network ...