Exploració per tema "Multiplexing"

Ara es mostren els items 1-20 de 48

    • A fully SDN enabled all-optical architecture for data centre virtualisation with time and space multiplexing 

      Kondepu, K; Jackson, Chirs; Ou, Y; Pagès Cruz, Albert; Agraz Bujan, Fernando; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2018-07-01)
      Article
      Accés obert
      Virtual Data Centre (VDC) solutions provide an environment that is able to quickly scale-up and where virtual machines and network resources can be quickly added on-demand through self-service procedures. VDC providers ...

    • A resource management scheme for multi-user GFDM with adaptive modulation in frequency selective fading channels 

      Tornés Molins, Bernat (Universitat Politècnica de Catalunya, 2016-05-03)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Technische Universität Dresden
      This final project focus on designing and evaluating a resource management scheme for a multi-user generalized frequency division multiplexing (GFDM) system, when a frequency selective fading channel and adaptive modulation ...

    • Absorptive frequency selective limiter for multiplexers 

      Hueltes Escobar, Alberto (Universitat Politècnica de Catalunya, 2012-07-05)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      RF & Microwave Receivers are used to detect low level signals. Therefore require high gain and low noise sensitive circuits at the input. These circuits (most of all LNA) are often susceptible to damage if exposed to ...

    • 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)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   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 ...

    • Autonomous and energy efficient lightpath operation based on digital subcarrier multiplexing 

      Velasco Esteban, Luis Domingo; Barzegar, Sima; Sequeira, Diogo Gonçalo; Ferrari, Alessio; Costa, Nelson; Curri, Vittorio; Pedro, João; Napoli, Antonio; Ruiz Ramírez, Marc (2021-09)
      Article
      Accés obert
      The massive deployment of 5G and beyond will require high capacity and low latency connectivity services, so network operators will have either to overprovision capacity in their transport networks or to upgrade the optical ...

    • Chirp-based direct phase modulation of VCSELs managed by Neural Networks 

      Kais Carranza, Johanna Libertad (Universitat Politècnica de Catalunya, 2019-05-29)
      Projecte Final de Màster Oficial
      Accés obert
      VCSEL's capacity of direct modulation and its low cost makes this device a feasible cost-effective transmitter for ultra-dense wavelength division multiplexing (uDWDM) metro-access networks using coherent detection. However, ...

    • Cost-effective spatial super-channel allocation in Flex-Grid/MCF optical core networks 

      Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Spadaro, Salvatore (2018-01-01)
      Article
      Accés obert
      Space Division Multiplexing (SDM) is a key technology to cope with the bandwidth limitations of single mode fibers. Multi-Core Fibers (MCFs) are considered as a promising candidate technology to implement SDM, due to their ...

    • Design and assessment of FM-MCFs-suited SDM-ROADMs with versatile spatial group configurations and unified QoT estimator 

      Rumipamba Zambrano, Rubén Darío; Muñoz González, Raül; Casellas Regi, Ramon; Perelló Muntan, Jordi; Spadaro, Salvatore; Elfiqi, Abdulaziz E. (Institute of Electrical and Electronics Engineers (IEEE), 2020-11-15)
      Article
      Accés obert
      In this article, we focus on the design of different node architectures suitable for few-mode multi-core fibers (FMMCFs) based networks. Both dimensions, core and mode, open different possible ways to group spatial channels ...

    • Design of a real-time multiplexed blood flow sensorial system 

      Mitjans Coma, Marc (Universitat Politècnica de Catalunya, 2018-01-18)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat

    • Dual-polarized feed for mmWave lens antennas 

      Albadalejo Lijarcio, Juan Luis (Universitat Politècnica de Catalunya, 2020-05)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Kungliga Tekniska högskolan / Ericsson
      The fact of being bulky and not very cost-efficient made lens antennas not to be taken much into account in the past. Nowadays, this kind of antennas has attracted more attention due to the increasing demand of higher ...

    • Dynamic subcarrier allocation for multipoint-to-point optical connectivity 

      Shakespear Miles, Hailey Josephine; Ruiz Ramírez, Marc; Napoli, Antonio; Velasco Esteban, Luis Domingo (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Text en actes de congrés
      Accés obert
      A mathematical programming model is proposed to dynamically allocate subcarriers in the upstream direction of point-to-multipoint connections based on Digital Subcarrier Multiplexing. Numerical results show significant ...

    • Dynamic traffic grooming in Joint Switching (JoS)-enabled flex-grid/SDM optical core networks 

      Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      We propose and evaluate a dynamic traffic grooming strategy enhancing the performance of JoS-enabled Flex-Grid/SDM networks. Results disclose up to 120% and 44% additional carried network traffic vs. no grooming and existing ...

    • Elastic Networks thematic network results I: Planning and control of Flex-Grid/SDM 

      Moreno Muro, Francisco Javier; Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Pavón Mariño, Pablo; Solé Pareta, Josep; Martínez, Ricardo; Casellas Regi, Ramón; Vilalta, Ricard; Muñoz González, Raül; Mata Sáez, Javier; Ruiz Pérez, Lidia; Merayo Álvarez, Noemí; Miguel Jiménez, Ignacio de; Durán Barroso, Ramón J. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      This paper overviews the approach of the Elastic Networks research network to address different issues of planning and control of Flex-Grid/SDM optical networks. Firstly, we present the Net2Plan open-source planning tool ...

    • Elastic systems 

      Cortadella, Jordi; Galcerán Oms, Marc; Kishinevsky, Michael (Institute of Electrical and Electronics Engineers (IEEE), 2010)
      Text en actes de congrés
      Accés obert
      Elastic systems provide tolerance to the variations in computation and communication delays. The incorporation of elasticity opens new opportunities for optimization using new correct-by-construction transformations that ...

    • Electrochemical multi-sensors obtained by applying an electric discharge treatment to 3D-printed poly(lactic acid) 

      Fontana Escartín, Adrián; Lanzalaco, Sonia; Bertran Cànovas, Òscar; Alemán Llansó, Carlos (2022-09-30)
      Article
      Accés restringit per política de l'editorial
      Electrochemical sensors for real-time detection of several bioanalytes have been prepared by additive manufacturing, shaping non-conductive poly(lactic acid) (PLA) filaments, and applying a physical treatment to create ...

    • Evaluating the energy efficiency of DWA algorithms in UDWDM-PONs 

      Segarra Mullerat, Josep; Sales Zaragozá, Vicente; Polo Querol, Víctor; Prat Gomà, Josep Joan (2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Ultra-Dense Wavelength Division Multiplexing (UDWDM) has been proposed for the optical access Passive Optical Network (PON) in the COst-effective COhereNt Ultra-dense-WDM-PON for lambda-To-the-user access (COCONUT) ...

    • Evaluation of Add/Drop flexibility requirements in future SDM-enabled ROADMs 

      Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Klinkowski, Miroslaw; Comellas Colomé, Jaume; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Text en actes de congrés
      Accés obert
      In this paper, we evaluate five different architectures for implementing the Add/Drop module of future Spatial Division Multiplexing (SDM)-enabled Re-configurable Optical Add & Drop Multiplexers (ROADMs) with different ...

    • Evaluation of core-continuity-constrained ROADMs for flex-grid/MCF optical networks 

      Moreno Muro, Francisco Javier; Rumipamba Zambrano, Rubén Darío; Pavón Mariño, Pablo; Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Spadaro, Salvatore (Institute of Electrical and Electronics Engineers (IEEE), 2017-11-01)
      Article
      Accés obert
      To effectively keep pace with the global IP traffic growth forecasted in the years to come, flex-grid over multi-core fiber (MCF) networks can bring superior spectrum utilization flexibility, as well as bandwidth scalability ...

    • Experimental demonstration of long-distance space-division multiplexing transmission over few-mode and multi-core fibers 

      Mestre Adrover, Miquel Àngel (Universitat Politècnica de Catalunya, 2013-02-13)
      Projecte/Treball Final de Carrera
      Accés obert
      [ANGLÈS] After the extremely fast growth over last two decades, single-mode fibers capacity is reaching its recently revealed fundamental limit, imposed by a combination of Shannon's information theory and fiber nonlinearities. ...

    • 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 ...