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Ara es mostren els items 41-60 de 89

    • Flexible resource provisioning of polarization independent coherent PONs based on non-orthogonal multiple access and multiCAP modulation 

      Izquierdo Nuñez, David; Sarmiento Hernández, Samael; Barrio Segura, Miguel; Clemente Vicente, Jesús; Millán, Pablo; Lázaro Villa, José Antonio; Garces Gregorio, Juan Ignacio; Altabas Navarro, José Antonio; Puerta, Rafael; Rommel, Simon; Vegas Olmos, Juan J.; Tafur Monroy, Idelfonso (Institute of Electrical and Electronics Engineers (IEEE); Optical Society of America, 2021-07)
      Article
      Accés obert
      A combined non-orthogonal multiple access (NOMA) and multiband carrierless amplitude and phase modulation (multiCAP) scheme is proposed for flexible resource provisioning in coherent passive optical networks (PONs). While ...

    • Flexible WDM/FTDM passive optical network with RZ-seeded all-optical sub-wavelength grid engine 

      Schrenk, Bernhard; Katopodis, Vasilis; Bauwelinck, Johan; Lázaro Villa, José Antonio; Yin, Xin; Bakopoulos, Paraskevas; Spyropoulou, Maria; Qiu, Xing Z.; Avramopoulos, Hércules (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      All-optical FDM grid generation and channel selection is experimentally demonstrated through optical signal processing. Full-duplex 10G/2×10G transmission with reflective ONUs is validated for 20dB budget and 25km reach. ...

    • Fortistis: Split extension in dense passive optical networks by inline amplification with remote ASE-shaped pump delivery via colorless optical network units 

      Schrenk, Bernhard; Bonada Bo, Francesc; Lázaro Villa, José Antonio; Prat Gomà, Josep Joan (2010)
      Text en actes de congrés
      Accés obert
      A method for extending the customer density via ASE-pumped splitters in the tree in a WDM/TDM-PON is presented. The influence of Rayleigh backscattering in the feeder is faced, originally prohibiting any upstream transmission.

    • FSK plus ASK/ASK operation for optical 20/10 gbps access networks with simple reflective user terminals 

      Schrenk, Bernhard; de Valicourt, Guilhem; Lázaro Villa, José Antonio; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2011)
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      Accés restringit per política de l'editorial
      Doubling of the downstream rate by reusing the reflective upstream modulator is demonstrated. With just two photo-detectors, a RSOA and a power splitter at the ONU, a 20/10 Gbps mode can be provided per wavelength.

    • Full-duplex 20/10 Gb/s WDM-PON with remodulation of chirped ASK and multi-level quaternary PAM and OFDM 

      Lázaro Villa, José Antonio; Bernhard, Schrenk; Maziotis, Alexandros; Cano Valadéz, Iván Nicolás; Bakopoulos, Paraskevas; Prat Gomà, Josep Joan; Avramopoulos, Hércules (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      A full-duplex 20/10Gb/s WDM-PON is demonstrated by all-optical carrier recovery technique, showing that it is efficient and flexible for being applied to different downstream signals as non-/chirped ASK or multilevel signals ...

    • High capacity converged passive optical network and RoF-based 5G+ fronthaul using 4-PAM and NOMA-CAP signals 

      Sarmiento Hernández, Samael; Delgado Mendinueta, José Manuel; Altabas Navarro, Jose Antonio; Spadaro, Salvatore; Shinada, Satoshi; Furukawa, Hideaki; Vegas Olmos, Juan José; Lázaro Villa, José Antonio; Wada, Naoya (Institute of Electrical and Electronics Engineers (IEEE), 2021-01-15)
      Article
      Accés obert
      Network architectural changes to satisfy all the 5G+ mobile network specifications and requirements are necessary due to the popularization of streaming and cloud applications on omnipresent portable devices. The combination ...

    • High customer density PON with passive amplification through distributed pump for > 1:1000 tree split 

      Schrenk, Bernhard; Bauwelinck, Johan; Bonada Bo, Francesc; Lázaro Villa, José Antonio; Xing-Zhi, Qiu; Chanclou, Philippe; Prat, Josep (2011-07-01)
      Article
      Accés restringit per política de l'editorial
      A network architecture for tree-like passive optical networks (PONs) with high splitting ratios is proposed and experimentally demonstrated. Splits >1000 are shown to be feasible thanks to a noise-powered amplifier that ...

    • Innovació i investigació docent per millorar l’enginy i la creativitat dels alumnes d’Enginyeria i Arquitectura 

      Villasevil Marco, Francisco Javier; López Martínez, Antonio Miguel; Gómez Urgellés, Joan Vicenç; Salán Ballesteros, Maria Núria; Lázaro Villa, José Antonio; Majó Roca, Mª Antonia; Soler Ruiz, Juan; Gorchs Altarriba, Roser; Llorens García, Ariadna; Papiol Vera, Emilia; Vigara Campmany, Julio Enrique; López Membrilla, Manuel; López Membrilla, Dolores; Morillas Varón, Rafael; Taberna Torres, Judit; Bernadó Ortega, Miguel (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2013-02-08)
      Text en actes de congrés / Comunicació de congrés
      Accés obert
      El nou marc de l’EEES i l’experiència docent en las àrees de l’Enginyeria i l’Arquitectura, indueix a pensar en la introducció de noves metodologies docents motivades per la necessitat d’adaptar, en la mesura del ...

    • L-Band In-Line Remote Amplification for an Extended WDM/PON Ring Architecture 

      Chatzi, Sotiria; Tomkos, Ioannis; Lázaro Villa, José Antonio; Prat Gomà, Josep Joan (IEEE Press. Institute of Electrical and Electronics Engineers, 2009-06-28)
      Text en actes de congrés
      Accés obert
      In this paper, a study on a fully passive WDM/PON ring architecture which reaches 19 km distance, while serving more than 1000 users with symmetric several hundred Mbit/s per user is presented. The design is based on ...

    • Laboratorio virtual multiplataforma de educacion en ingenieria 

      Fernández Canti, Rosa M.; Lázaro Villa, José Antonio; Villar Zafra, A.; Zarza Sánchez, Sergio (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2012-07-06)
      Text en actes de congrés
      Accés obert
      Se presenta un laboratorio virtual autónomo y multiplataforma para docencia. La plataforma implementada incluye un servidor con conexión SSH (Secure SHell) y un repositorio separado que contiene los experimentos virtuales. ...

    • Laboratorio virtual multiplataforma para educación en ingeniería 

      Fernández Canti, Rosa M.; Lázaro Villa, José Antonio; Villar Zafra, Aitor; Zarza Sánchez, Sergio (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació (ICE), 2012)
      Text en actes de congrés
      Accés obert
      Se presenta un laboratorio virtual autónomo y multiplataforma para docencia. La plataforma implementada incluye un servidor con conexión SSH (Secure SHell) y un repositorio separado que contiene los experimentos virtuales. ...

    • Layer 2 redesign for Metro-Access next generation PON 

      López Pastor, Eduardo Tommy; Polo Querol, Víctor; Lázaro Villa, José Antonio; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Necessary modifications and extensions into Layer 2 of the actual PON access are necessary in order to meet new requirements from services providers and users. We propose a flexible Transmission Convergence (TC) Layer ...

    • Modeling of integrated erbium-doped waveguide amplifiers with overlapping factors methods 

      Vallés Brau, Juan Antonio; Lázaro Villa, José Antonio; Rebolledo Sanz, Miguel Ángel (1996-09)
      Article
      Accés restringit per política de l'editorial
      An analysis of the applicability of overlapping factors methods to the modeling of integrated erbium-doped waveguide amplifiers is presented. These methods offer as main advantage a considerable seduction in computation ...

    • Monitoring and remote control of energy consumption by WiFi networks. Smart energy saving platform 

      Zarza Sánchez, Sergio; Fernández Canti, Rosa M.; Lázaro Villa, José Antonio; Ortega Gómez, Isidre; Altabas, Jose Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2014)
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      Accés restringit per política de l'editorial
      In this paper we present a modular system for remote monitoring and control of energy consumption. In particular, we demonstrate the application of the proposed system for electric energy monitoring and control in domestic ...

    • Multiplatform virtual laboratory for engineering education 

      Villar Zafra, Aitor; Zarza Sánchez, Sergio; Lázaro Villa, José Antonio; Fernández Canti, Rosa M. (IEEE, 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      An autonomous and multi platform virtual laboratory for educational purposes is presented. The implemented platform includes a server with a SSH(Secure SHeil)connection and a separated repository containing the virtual ...

    • Network dimensioning for a TDM-PON deployment Single-fibre single-wavelength-reuse based on reflective ONUs 

      López Pastor, Eduardo Tommy; Polo Querol, Víctor; Lázaro Villa, José Antonio; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The network dimensioning for a TDM-PON deployment based on reflec tive ONUs is presented in order to optimize number of users for efficient exploitation. Due to wavelength reuse, the study is focused on the power budget ...

    • Non-orthogonal multiple access and carrierless amplitude phase modulation for flexible multi-user provisioning in 5G mobile networks 

      Altabás Navarro, José Antonio; Rommel, Simon; Puerta, Rafael; Izquierdo, David; Garces, Ignacio; Lázaro Villa, José Antonio; Vegas Olmos, Juan José; Tafur Monroy, Idelfonso (2017-10-07)
      Article
      Accés obert
      In this paper, a combined non-orthogonal multiple access (NOMA) and multiband carrierless amplitude phase modulation (multiCAP) scheme is proposed for capacity enhancement of and flexible resource provisioning in 5G mobile ...

    • Numerical simulation of bending effects in erbium-doped fibre amplifiers 

      Lázaro Villa, José Antonio; Rebolledo Sanz, Miguel Ángel (Institute of Physics (IOP), 1996-05)
      Article
      Accés restringit per política de l'editorial
      A numerical simulation of the effects caused by bends in erbium-doped fibres is presented. The perturbation of the gain and amplified spontaneous emission has been analysed with a model of the evolution of the pump, signal ...

    • On an ONU for full-duplex 10.5 Gbps/lambda with shared delay interferometer for format conversion and chirp filtering 

      Schrenk, Bernhard; Stamatiadis, C.; Lazarou, I.; Maziotis, Alexandros; de Valicourt, Guilhem; Lázaro Villa, José Antonio; Prat Gomà, Josep Joan; Avramopoulos, Hércules (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Chirped IRZ downstream is used together with a delay interferometer and a RSOA at a low complexity ONU for full-duplex 10.5Gbps transmission on a single wavelength, supported by modulation format conversion and optical ...

    • ONU optimal gain and position of the distribution element in Rayleigh-limited WDM and TDM PONs with reflective ONU 

      López Pastor, Eduardo Tommy; Lázaro Villa, José Antonio; Arellano Pinilla, Cristina; Polo Querol, Víctor; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The influence of the distribution element position in PONs is reported. Best Crosstalk-to-Signal ratio (C/S) is achieved if it is placed either in the ONU or OLT vicinity with optimum ONU gain depending of the MUX position