Exploració per tema "WLAN"

Ara es mostren els items 53-72 de 73

    • Matlab Wi-Fi simulations considering interferences in dense urban environments 

      Pascual Mir, Didac (Universitat Politècnica de Catalunya, 2017-10-17)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Technische Universität Wien
      In recent years, there has been a high growth in the number of mobile devices and the transit of global data, with a forecast of exponential growth. It has also been observed that this growth takes place in urban environments ...

    • New algorithm for distributed frequency assignments in IEEE 802.11 

      García Villegas, Eduard; Vidal Ferré, Rafael; Paradells Aspas, Josep (2007-02-28)
      Text en actes de congrés
      Accés obert
      The continuous growth of IEEE 802.11 wireless local area networks (WLAN) brings the benefit of a high speed wireless access to packet networks, such as Internet. But it also entails the successive appearance of new ...

    • Outdoor IEEE 802.11g cellular network performance 

      López Aguilera, M. Elena; Casademont Serra, Jordi; Cotrina Navau, Josep (Institute of Electrical and Electronics Engineers, 2004)
      Text en actes de congrés
      Accés obert
      Most studies about the performance of IEEE 802.11 are limited to a single cell environment. Nevertheless, the idea of designing an outdoor cellular network based on WLAN IEEE 802.11 is very attractive, due to the several ...

    • Performance enhancement of outdoor IEEE 802.11 cellular networks 

      López Aguilera, M. Elena; Casademont Serra, Jordi; Rojas Espinosa, Alfonso; Cotrina Navau, Josep (ACTA Press, 2005-07)
      Text en actes de congrés
      Accés obert
      Most studies about the performance of IEEE 802.11 are limited to a single cell environment. Nevertheless, the idea of designing an outdoor cellular network based on WLAN IEEE 802.11 results very attractive, due to the ...

    • Performance enhancement of WLAN IEEE 802.11 for asymmetric traffic 

      López Aguilera, M. Elena; Casademont Serra, Jordi; Cotrina Navau, Josep; Rojas Espinosa, Alfonso (Institute of Electrical and Electronics Engineers, 2005)
      Text en actes de congrés
      Accés obert
      Most studies about the performance of IEEE 802.11 consider scenarios of ad-hoc topology and networks where all stations have the same traffic load (symmetric traffic conditions). This paper presents a study of performance ...

    • Redes inalámbricas 

      Salazar Soler, Jorge (European Virtual Learning Platform for Electrical and Information Engineering, 2016-06-11)
      Llibre
      Accés obert
      Este módulo proporciona una introducción a las redes inalámbricas en general y a las redes inalámbricas de área local en particular. Describe y explica lo que son las diferentes tecnologías inalámbricas, sus principales ...

    • Round-trip-time positioning in the Siemens Scalance W product prototype 

      Casacuberta Prat, Ivan (Universitat Politècnica de Catalunya, 2010-12-21)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   Siemens Aktiengesellschaft
      En aquest projecte podem trobar el disseny i implementació d'un prototip de posicionament indoor mitjançant WLAN. Aquest prototip incorpora en la mateixa plataforma, fins a 4 tècniques diferents per obtenir el RTT (Round ...

    • Seguridad en WLAN 802.11: evaluación de las contramedidas para combatir el ataque de falsificación 

      García Dueñas, Mireia (Universitat Politècnica de Catalunya, 2010-05-28)
      Treball Final de Grau
      Accés obert

    • Self-optimization of Radio Resources on IEEE 802.11 Networks 

      García Villegas, Eduardo (Universitat Politècnica de Catalunya, 2010-02-18)
      Tesi
      Accés obert
      Les xarxes d'àrea local sense fils (WLANs), principalment les basades en les diverses versions de les normes IEEE 802.11, i més concretament, aquelles operant en mode infraestructura (ús de punts d'accés o APs), són avui ...

    • Sistema de generació i recepció per a la mesura de senyals de RF amb modulacions i codificacions digitals 

      Vergés Pérez, Roger (Universitat Politècnica de Catalunya, 2019-06)
      Treball Final de Grau
      Accés obert
      The world of telecommunications is constantly growing and there is an increasing need of systems able to measure the response of new devices to digitally modulated signals. This project develops a remote control system to ...

    • Software based measurement of round trip time observables for location in IEEE 802.11 networks 

      Martín Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Time-based multilateration in IEEE 802.11 networks usually involves custom hardware designs, which tend to slow down the implementation and deployment of the location system. This paper presents software for calculating ...

    • Software-based system for measuring location observables in IEEE 802.11 networks 

      Martín Escalona, Israel; Barceló Arroyo, Francisco; Zola, Enrica Valeria (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Several techniques have been proposed for positioning nodes over IEEE 802.11 networks, but only few consist in time-based multilateration, mainly due to the protocol stack not supporting accurate timestamps. One frequent ...

    • Study of scalability of passive and active solutions for time-based ranging in IEEE 802.11 networks 

      Malpartida Tablado, Marta (Universitat Politècnica de Catalunya, 2015-09-08)
      Projecte Final de Màster Oficial
      Accés obert
      Wireless positioning systems have become very popular in recent years. Outdoor positioning has been addressed successfully, but location indoor present some issues, such as the scalability. The aim of this study is evaluate ...

    • Synchronization of Wi-Fi-based small cells 

      Almendros Casado, Iván (Universitat Politècnica de Catalunya, 2019-07-11)
      Treball Final de Grau
      Accés obert
      Its prominent position as non-line of sight RAT for data communications in small cells, along with its continuous evolution, make the IEEE 802.11 family of standards a good candidate to play a key role in future 5G ...

    • Técnicas de reducción de la PAPR en modulaciones OFDM e impacto sobre amplificadores de potencia no lineales 

      Quijada Ferrero, Raúl (Universitat Politècnica de Catalunya, 2008-07-17)
      Projecte/Treball Final de Carrera
      Accés obert
      OFDM se presenta como una modulación para la nueva generación de comunicaciones móviles (4G), la cual ha sido empleada en estándares como DAB / DVB, wireless LAN, xDSL, WiMAX y PLC; siendo una de las modulaciones ...

    • Throughput and range characterization of IEEE 802.11ah 

      Baños González, Víctor Hugo; Afaqui, Muhammad Shahwaiz; López, Elena; García Villegas, Eduard (2017-08-23)
      Article
      Accés obert
      The most essential part of Internet of Things (IoT) infrastructure is the wireless communication system that acts as a bridge for the delivery of data and control messages. However, the existing wireless technologies lack ...

    • Transmit power control mechanisms in IEEE 802.11 cellular networks 

      López Aguilera, M. Elena; Casademont Serra, Jordi (Association for Computing Machinery, 2006)
      Text en actes de congrés
      Accés obert
      Actually, Wireless Local Area Networks (WLAN) are being extensively deployed in many places to provide easy access to Internet. Moreover, networks that span large buildings or campuses must comprise multiple cells. ...

    • Wake-up radio: an enabler of wireless convergence 

      Cervià Caballé, Martí; Calveras Augé, Anna M.; Paradells Aspas, Josep (Institute of Electrical and Electronics Engineers (IEEE), 2021-01-01)
      Article
      Accés obert
      Nowadays, several wireless communication solutions targeted at low-power devices (e.g. sensors, actuators) compete for market dominance. As a consequence, the deployment of the Internet of Things is slowed by fragmentation. ...

    • Wireless LISP: Prototyping and Evaluation A LISP Implementation in the BOWL Testbed at Deutsche Telekom Labs 

      Ferrer Almirall, Marc (Universitat Politècnica de Catalunya, 2011-05-12)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   Technische Universität Berlin
      Català: Implementació del protocol LISP en una xarxa inalàmbrica mallada. Proposta d'un sistema de mapeig de LISP per tal d'investigar en el domini de la mobilitat inalàmbrica (roaming). Evaluació de la implementació ...

    • WLAN performance analysys for indoor environments 

      Oliver Arbona, Bartolome (Universitat Politècnica de Catalunya, 2015-07)
      Treball Final de Grau
      Accés obert
      Realitzat a/amb:   Technische Universität Wien
      Studies report that in the next years there will be a high increase in the number of mobile devices, the overall data traffic generated by mobile devices, and a migration from larger cells towards Wireless Local Area ...