Exploració per tema "Multiplexatge"

Ara es mostren els items 21-40 de 51

    • 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. ...

    • Fairness Analysis of Wireless Beamforming Schedulers 

      Bartolomé Calvo, Diego (Universitat Politècnica de Catalunya, 2005-01-12)
      Tesi
      Accés obert
      Aquesta tesi es dedica a l'anàlisi de la justícia a la capa física en entorns de comunicacions amb múltiples antenes i diversos usuaris, cosa que implica un nou punt de vista sobre problemas tradicionals. Malgrat això, el ...

    • 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 ...

    • Intensity modulation and direct detection OFDM dimensioning for next-generation passive optical networks 

      Calmels, Bruno Alberto (Universitat Politècnica de Catalunya, 2012-08-26)
      Projecte Final de Màster Oficial
      Accés obert
      [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.

    • Investigation on Crosstalk in Multi-core Optical Fibers 

      Tapia Martinez, Ludwig Adolfo (Universitat Politècnica de Catalunya, 2015-09)
      Projecte Final de Màster Oficial
      Accés obert
      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 ...

    • Link prediction in multiplex networks via triadic closure 

      Tuninetti, Marta; Aleta, Alberto; Paolotti, Daniela; Moreno, Yamir; Starnini, Michele (American Physical Society, 2020-11-16)
      Article
      Accés obert
      Link prediction algorithms can help to understand the structure and dynamics of complex systems, to reconstruct networks from incomplete data sets, and to forecast future interactions in evolving networks. Available ...

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

    • Modeling physical-layer impairments in multi-domain optical networks 

      Yannuzzi, Marcelo; Marín Tordera, Eva; Serral Gracià, René; Masip Bruin, Xavier; González de Dios, Óscar; Jimenez Chico, Javier; Verchere, Dominique (IEEE Computer Society Publications, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The advantages of optical transparency are still confined to the boundaries of a domain, since the optical signals are subject to O/E/O conversions at the border nodes that separate two optical domains. The extension ...

    • Modulation Schemes Based on Metasurfaces for mmWave Communication Systems 

      Miguens i Gispets, Joan (Universitat Politècnica de Catalunya, 2022-07-05)
      Treball Final de Grau
      Accés obert
      La tecnología Reconfigurable Intelligent Surface (RIS) se postula como una clara candidata a revolucionar las comunicaciones inalámbricas a partir del 6G y las siguientes generaciones de comunicaciones móviles. Una RIS es ...

    • Monolithically integrated dual-output DEML for full duplex DPSK-ASK and DPSK-SSB ONU in ultra-dense channel spaced access network 

      Chu, Guangyong; Cano Valadéz, Iván Nicolás; Polo Querol, Víctor; Kazmierski, Christophe; Brenot, Romain; Prat Gomà, Josep Joan (Institute of Electrical and Electronics Engineers (IEEE), 2016-04)
      Article
      Accés obert
      Ultra-dense access network attracts people's attention recently; however, until now it is difficult to implement it commercially owing to cost, footprint, and the traditional complexity of coherent receiver. Single laser, ...

    • Multibeam systems for the detection of gas flares in the water column 

      Zwanzig, Christian (SARTI, 2016)
      Comunicació de congrés
      Accés obert
      Wärtsilä ELAC Nautik is one major global player in the multibeam business. The multibeam systems are marketed under the well-known brand name SeaBeam, including systems for medium water depth and deep-water areas. The ...

    • Next Generation Optical Access Networks: from TDM to WDM 

      Gutiérrez González, Lluís; Garfias Hernandez, Paola; Andrade Jardín, Marilet de; Cervelló Pastor, Cristina; Sallent Ribes, Sebastián (INTECH, 2010-03)
      Capítol de llibre
      Accés obert

    • Nyquist Modulation vs OFDM for Fiber-optic Communications 

      Escuder Folch, Carles (Universitat Politècnica de Catalunya, 2016-06)
      Treball Final de Grau
      Accés obert
      In nowadays society, the need of fast, reliable communications is growing faster and faster each day. For this reason, there is the need of improving the current communications systems in terms of speed (faster data ...

    • On the scalability of dynamic Flex-Grid/SDM optical core networks 

      Rumipamba Zambrano, Rubén Darío; Perelló Muntan, Jordi; Gené Bernaus, Joan M.; Spadaro, Salvatore (2018-09-04)
      Article
      Accés obert
      Future optical core networks realizing Flex-Grid and Space Division Multiplexing (Flex-Grid/SDM) will be key to effectively cope with the rapid growth of the Internet traffic, thanks to their superior capacity and spectrum ...

    • Optimization of emerging extended FTTH WDM/TDM PONs and financial overall assessment 

      Chatzi, Sotiria (Universitat Politècnica de Catalunya, 2013-11-26)
      Tesi
      Accés obert
      Optical access technology has experienced a boost in the last years, thanks to the continuously migrating multimedia services that are offered over the internet. Though the technologies used for deploying Fiber-To-The-x ...

    • Performance evaluation of Flex-Grid/MCF optical networks considering internal node losses 

      Casal Rodriguez, Jonathan (Universitat Politècnica de Catalunya, 2019-05-24)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor

    • Practical bit loading schemes for multi-antenna multi-user wireless OFDM systems 

      Bartolomé Calvo, Diego; Pérez Neira, Ana Isabel (2004)
      Text en actes de congrés
      Accés obert
      This paper deals with practical multi-antenna multiuser OFDM systems. With the additional degrees of freedom of multiple antennas and multiple subcarriers, the performance might be enhanced, but the scheduling complexity ...

    • Prediction of new scientific collaborations through multiplex networks 

      Tuninetti, Marta; Aleta, Alberto; Paolotti, Daniela; Moreno, Yamir; Starnini, Michele (2021-12)
      Article
      Accés obert
      The establishment of new collaborations among scientists fertilizes the scientific environment, fostering novel discoveries. Understanding the dynamics driving the development of scientific collaborations is thus crucial ...

    • Real-Time MIMO receiver for mode-division multiplexing over coupled-mode optical fibers 

      Luan, Jie (Universitat Politècnica de Catalunya, 2016-05-25)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Nokia Bell Labs
      Today’s demand for increasing information transmission capacity has led us to develop new technologies to beat the theoretical capacity limit. Among these, advances in digital fiber-optic communication have been a especially ...