Exploració per tema "CDMA"
Ara es mostren els items 1-20 de 21
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Adaptive S-ALOHA CDMA as an alternative way of integrating services in mobile environments
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2000-05)
Article
Accés obertCode-division multiple-access (CDMA) schemes appear to be very promising access techniques for coping with the requirements of third-generation mobile systems, mainly because of their flexibility. This paper proposes an ... -
Analysis of a type II hybrid ARQ strategy in a DS-CDMA packet transmission environment
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2003-08)
Article
Accés obertA type II hybrid automatic repeat request scheme is considered as a retransmission strategy in a direct-sequence code-division multiple-access packet mobile radio network. An analysis based on equilibrium point analysis ... -
Blind multiuser detection with array observations
(1998-01)
Article
Accés obertCochannel interference is usually a major limitation to the performance of mobile wireless systems. Examples of different forms of cochannel interference include multi-access interference in CDMA systems and cochannel ... -
Code-timing synchronization in DS-CDMA systems using space-time diversity
(Servicio de Publicaciones Universidad de Vigo, 1999)
Text en actes de congrés
Accés obertThe synchronization of a desired user transmitting a known training sequence in a direct-sequence (DS) asynchronous code-division multiple-access (CDMA) sys-tem is addressed. It is assumed that the receiver consists of an ... -
Contribución a la caracterización de los sistemas de comunicaciones móviles: alternativas a la mejora de la capacidad de un sistema
(Universitat Politècnica de Catalunya, 1999-03-05)
Tesi
Accés obertEsta Tesis presenta un estudio detallado de los mecanismos de control de potencia para un sistema de comunicaciones móviles basado en la técnica de multiplexado CDMA. En particular se ha llevado a cabo una evaluación de ... -
Contribución al estudio de técnicas de acceso aleatorio y al análisis de la calidad de servicio en sistemas de transmisión por paquetes para comunicaciones móviles basadas en CDMA
(Universitat Politècnica de Catalunya, 2001-04-23)
Tesi
Accés obertLa presente tesis doctoral se enmarca dentro del sector de las comunicaciones móviles, y en particular de los denominados sistemas de tercera generación, que se plantean como objetivo el poder ofrecer una gran diversidad ... -
Cross-layer schedulling strategy for UMTS downlink enhancement
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-06)
Article
Accés obertThis article describes the benefits of including cross-layer information in the scheduling mechanism of a UMTS downlink channel. In particular, the information obtained from the fast power control algorithm is used to ... -
Design and implementation of a wide-band real-time mobile channel emulator
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1999-05)
Article
Accés obertA new wide-band mobile channel emulator for the CODIT project is designed and implemented. The UMTS code-division testbed (CODIT R2020) is a research project within the European RACE-II program set up by the Commission of ... -
Digital Beamforming Implementation on an FPGA Platform
(Universitat Politècnica de Catalunya, 2007-07)
Projecte/Treball Final de Carrera
Accés obertThe objective of the work presented is to implement a Digital Beamforming (DBF) platform for an antenna array receiver designed for the S-DMB system. Our project deals with the design of antenna arrays from a hardware ... -
Diseño e implementación de un demodulador para un sistema de comunicaciones CDMA
(Universitat Politècnica de Catalunya, 2009-07-27)
Projecte/Treball Final de Carrera
Accés obert -
Feasibility condition for the uplink of a CDMA multiservice mobile communication system with repeaters
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2005-05)
Article
Accés obertThis paper derives a general analytical expression of the feasibility condition for the uplink of a CDMA mobile communications system in a general scenario where the users in the system belong to an arbitrary number of ... -
Harmonic balance algorithm to model nonlinear effects in HTS filters subject to CDMA signals
(Institute of Electrical and Electronics Engineers, 2003-06)
Text en actes de congrés
Accés obertWe discuss an harmonic balance algorithm to analyze High Temperature Superconducting (HTS) circuits subject to wideband signals, such as the ones used in CDMA wireless systems. Undersampling is used to discretize and ... -
Impact of the Alamouti diversity technique on a CDMA platform
(Universitat Politècnica de Catalunya, 2009)
Projecte/Treball Final de Carrera
Accés obertThis thesis is based on the study of the BER in link level of a cellular CDMA platform developed by Wireless Reserch Group of BIT. For that, and firstly, we have focused on the theory relative to the spread spectrum ... -
Nonuniform traffic distribution model in reverse link of multilaterate/multiservie WCDMA/based systems
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-09)
Article
Accés obertThis paper focuses on the modeling of the reverse link of a wideband code division multiple access system in a nonhomogeneous environment with a single cell. Multiple traffic spatial and service nonuniformities are considered ... -
On the optimum traffic allocation in heterogeneous CDMA/TDMA networks
(IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2007-09)
Article
Accés obertThis paper presents the optimum user allocation in heterogeneous scenarios with CDMA and TDMA technologies in order to minimize the total outage probability in the uplink. An analytical model reflecting the different nature ... -
Self-reference spatial diversity processing for spread spectrum communications
(2000-09)
Article
Accés restringit per política de l'editorialn this paper, the application of three blind (or selfreference) spatial diversity signal processing methods to Spread Spectrum (SS) communications is described. These methods do not require any kind of side information ... -
Simulació de tecniques d'accés i estudi del PAPR per a transmissors d'emissores reconfigurables
(Universitat Politècnica de Catalunya, 2009-11-25)
Treball Final de Grau
Accés obert -
Simulación de un cancelador sucesivo de interferencia para un sistema de comunicación CDMA asíncrono
(Universitat Politècnica de Catalunya, 2011-11-30)
Projecte/Treball Final de Carrera
Accés restringit per acord de confidencialitat -
Sistema Microcomputador per a l'Enregistrament de Dades GPS d'una Bicicleta Elèctrica
(Universitat Politècnica de Catalunya, 2011-05-04)
Projecte/Treball Final de Carrera
Accés obertCatalà: L'objectiu principal del projecte és desenvolupar un sistema de localització d'una bicicleta elèctrica. El projecte s'engloba dins de l'abast d'un altre dedicat a la millora de la bicicleta elèctrica que desenvolupa ... -
Software de simulación mediante Matlab de sistemas de comunicación móviles enfocado a la docencia
(Universitat Politècnica de Catalunya, 2012-06)
Projecte/Treball Final de Carrera
Accés obertEste proyecto se basa en la futura asignatura obligatoria en el Grado de Sistemas Electrónicos, Comunicaciones Móviles. Primero obtendremos conocimientos de los temas que se va a implantar y lo estudiaremos. Segundo ...