Now showing items 1-20 of 31

  • Absorptive frequency selective limiter for multiplexers 

    Hueltes Escobar, Alberto (Universitat Politècnica de Catalunya, 2012-07-05)
    Master thesis
    Restricted access - author's decision
    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 ...
  • 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
    Open Access
    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 ...
  • 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 ...
  • 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)
    Bachelor thesis
    Open Access
    Covenantee:  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 ...
  • Chirp-based direct phase modulation of VCSELs managed by Neural Networks 

    Kais Carranza, Johanna Libertad (Universitat Politècnica de Catalunya, 2019-05-29)
    Master thesis
    Open Access
    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
    Open Access
    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 of a real-time multiplexed blood flow sensorial system 

    Mitjans Coma, Marc (Universitat Politècnica de Catalunya, 2018-01-18)
    Master thesis
    Restricted access - confidentiality agreement
  • 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)
    Conference report
    Open Access
    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, Raul; 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)
    Conference report
    Open Access
    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)
    Conference report
    Open Access
    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 ...
  • Evaluating the energy efficiency of DWA algorithms in UDWDM-PONs 

    Segarra Mullerat, Josep; Sales Zaragozá, Vicente; Polo Querol, Víctor; Prat Gomà, Josep Joan (2016)
    Conference report
    Restricted access - publisher's policy
    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 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
    Open Access
    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)
    Master thesis (pre-Bologna period)
    Open Access
    [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. ...
  • High-SNR analytical performance of spatial multiplexing MIMO systems with CSI 

    García Ordoñez, Luis; Palomar, Daniel P.; Pagès Zamora, Alba Maria; Rodríguez Fonollosa, Javier (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-11-30)
    Article
    Open Access
    In this paper, we investigate the average and outage performance of spatial multiplexing multiple-input multiple-output (MIMO) systems with channel state information at both sides of the link. Such systems result, for ...
  • Hybrid turbo FEC/ARQ systems and distributed space-time coding for cooperative transmission 

    Agustín de Dios, Adrián; Vidal Manzano, José; Muñoz Medina, Olga (2005-08-24)
    Article
    Open Access
    Cooperative transmission can be seen as a "virtual" MIMO system, where the multiple transmit antennas are in fact implemented distributed by the antennas both at the source and the relay terminal. Depending on the system ...
  • Intensity modulation and direct detection OFDM dimensioning for next-generation passive optical networks 

    Calmels, Bruno Alberto (Universitat Politècnica de Catalunya, 2012-08-26)
    Master thesis
    Open Access
    [ANGLÈS] A cost-effective architecture for next-generation passive optical networks is designed and dimensioned, based on intensity modulation and direct detection optical orthogonal frequency division multiple access.
  • Inter-domain Routing in Optical Networks with Wavelength Converters 

    Beshir, Anteneh; Yannuzzi, Marcelo; Kuipers, Fernando Antonio (IEEE Computer Society Publications, 2010)
    Conference report
    Open Access
    With the increasing deployment of wavelengthdivision multiplexing (WDM) optical networks, the need for advanced lightpath provisioning algorithms and protocols in a multi-domain setting is becoming evident. In order to ...
  • Investigation on Crosstalk in Multi-core Optical Fibers 

    Tapia Martinez, Ludwig Adolfo (Universitat Politècnica de Catalunya, 2015-09)
    Master thesis
    Open Access
    We start by describing what SDM is, the problem at hand for it’s been considered and the different solutions it can provide. We focus on Multi - Core Fibers (MCF) as the favorite solution re garding SDM and ...
  • Investigation on Nyquist Modulation and Multiplexing for Fiber-Optic Communications 

    Jubany Ticó, Marc (Universitat Politècnica de Catalunya, 2016-02)
    Bachelor thesis
    Open Access
    Nowadays, the society in which we live, the need to communicate increases every day; therefore, there is a need to improve both spectral efficiency and methods of transmitting data faster. This thesis analyses a new ...
  • Mode Division Multiplexing using MIMO Processing 

    Porcar Pujol, Oriol (Universitat Politècnica de Catalunya / Technical University of Denmark. Department of Photonics Engineering - High Speed Optical Communications, 2012-02)
    Master thesis (pre-Bologna period)
    Open Access
    Covenantee:  Danmarks tekniske universitet
    [ANGLÈS] Mode division multiplexing technologies in multimode optical fibers are being considered as one of the possible solution to the ever growing user capacity demands. Problems derived from this kind of fibers can be ...