Exploració per autor "Agustí Comes, Ramon"
Ara es mostren els items 21-40 de 172
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A roadmap from UMTS optimization to LTE self-optimization
Sallent Roig, Oriol; Pérez Romero, Jordi; Sánchez González, Juan; Agustí Comes, Ramon; Díaz Guerra, Miguel Angel; Henche, David; Paul, Daniel (2011-06)
Article
Accés restringit per política de l'editorialSelf-Organizing Networks (SON) are currently being introduced by the 3rd Generation Partnership Project (3GPP) as part of the Long Term Evolution (LTE) system as a key driver for improving the operation of wireless networks. ... -
A robustness analysis of learning-based coexistence mechanisms for LTE-U operation in non-stationary conditions
Pérez Romero, Jordi; Sallent Roig, Oriol; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2015)
Text en actes de congrés
Accés restringit per política de l'editorialThe use of Long Term Evolution (LTE) in the unlicensed 5 GHz band, referred to as LTE-U, is a promising enhancement to increase the capacity of LTE networks and meet the requirements of future systems. This paper considers ... -
A self-organized spectrum assignment strategy in next generation OFDMA networks providing secondary spectrum access
Bernardo Álvarez, Francisco; Agustí Comes, Ramon; Pérez Romero, Jordi; Sallent Roig, Oriol (2009)
Text en actes de congrés
Accés obertThis paper proposes a Self-organized Spectrum Assignment strategy in the context of next generation multicell Orthogonal Frequency Division Multiple Access networks. The proposed strategy is able to dynamically find ... -
A simple algorithm to distribute optimally a number of external base stations in a microcellular environment
Agustí Comes, Ramon; Monfort, Xavier Querol; Pérez Romero, Jordi (Institute of Electrical and Electronics Engineers (IEEE), 1998)
Text en actes de congrés
Accés obertA simple algorithm is proposed for the optimal distribution of a number of base stations in a microcellular environment. Criteria are defined in order to decide the combinations of antennas that should be tested, and a ... -
A solution framework to provide management services for wireless communications in the digital home
Ferrús Ferré, Ramón Antonio; Sallent Roig, Oriol; Pérez Romero, Jordi; Agustí Comes, Ramon (2012-11)
Article
Accés restringit per política de l'editorialThe future digital home (DH) is envisioned as a place where a plethora of diverse personal and machine-to-machine communications will coexist to support different applications in areas such as information and ... -
Acotación de la probabilidad de error en un sistema de transmisión digital por fibra óptica
Agustí Comes, Ramon; Junyent Giralt, Gabriel (1980)
Text en actes de congrés
Accés obertDans ce papier, on a obtenu des bornes inférieure et supérieure de la probabilité d 'erreur par symbole dans un systemè de transmission numérique par Fibre Optique. Pour celà, nous avons employé une simplification de la ... -
Adaptive algorithms for improving the throughput in an indoor mobile s-aloha ds-cdma system
Sallent Roig, Oriol; Agustí Comes, Ramon (DR. F-N PAVLIDOU IEEE, 1996)
Text en actes de congrés
Accés obertThis paper presents a novel Adaptive DSCDMA Slotted-ALOHA packet random access scheme with transmitter-based spreading codes for mobiles. It is aimed at improving the throughput and message delay delivery when traffic ... -
Adaptive S-ALOHA CDMA as an alternative way of integrating services in mobile environments
Sallent Roig, Oriol; Agustí Comes, Ramon (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 ... -
Adaptive s-aloha cdma as an alternative way of integrating services in mobile environments
Sallent Roig, Oriol; Agustí Comes, Ramon (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 ... -
Adaptive schemes for packet data in a ds-cdma environment
Sallent Roig, Oriol; Agustí Comes, Ramon (IEEE INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS, INC., 1997)
Text en actes de congrés
Accés obertThis paper presents a novel adaptive DS-CDMA slotted-ALOHA packet random access scheme for improving the throughput of the conventional DS-CDMA slotted-ALOHA system. For this purpose a mobile-assisted algorithm is envisaged ... -
Admission control for multi-tenant radio access networks
Pérez Romero, Jordi; Sallent Roig, Oriol; Ferrús Ferré, Ramón Antonio; Agustí Comes, Ramon (2017)
Text en actes de congrés
Accés restringit per política de l'editorialThe sharing of Radio Access Networks is gaining momentum in small cell scenarios, due to the associated reduction in capital and operational costs. In this scenario, the split of radio resources among tenants sharing the ... -
Alternativas para una “canalización subóptima” del espectro radioeléctrico permitido al satélite de telecomunicaciones europeo ECS
Agustí Comes, Ramon; Delgado Penin, José Antonio (1979)
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Accés obert -
An adaptive ISMA-DS/CDMA MAC protocol for third-generation mobile communications systems
Pérez Romero, Jordi; Agustí Comes, Ramon; Sallent Roig, Oriol (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-11)
Article
Accés obertIn this paper, an inhibit sense multiple access–direct sequence/code division multiple access (ISMA-DS/CDMA) medium access control protocol for a packet transmission mobile radio network is presented. The main feature ... -
An application of reinforcement learning for efficient spectrum usage in next-generation mobile cellular networks
Bernardo Álvarez, Francisco; Agustí Comes, Ramon; Pérez Romero, Jordi; Sallent Roig, Oriol (2010-07)
Article
Accés obertThis paper proposes reinforcement learning as a foundational stone of a framework for efficient spectrum usage in the context of nextgeneration mobile cellular networks. The objective of the framework is to efficiently use ... -
An efficient data transmission policy in an integrated voice-data ds-cdma network
Sallent Roig, Oriol; Agustí Comes, Ramon (IEEE Vehicular Technology Society, 1998)
Text en actes de congrés
Accés obertCDMA schemes appear to be promising access techniques for coping with the requirements of third-generation mobile systems, mainly because of their flexibility. This paper proposes an adaptive S-ALOHA DS-CDMA access scheme ... -
An emulator framework for a new radio resource management for QoS guaranteed services in W-CDMA
Sallent Roig, Oriol; Pérez Romero, Jordi; Casadevall Palacio, Fernando José; Agustí Comes, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 2001-10)
Article
Accés obertIn the context of third-generation (3G) systems a mix of services with different requirements are expected. Consequently, packet scheduling mechanisms for quality of service (QoS) guarantees will play a key role. This paper ... -
An implementation of UTRAN for WINEGLASS access network emulator
Badini, F; SCARRONE, E; Kuehn, E; Casadevall Palacio, Fernando José; Agustí Comes, Ramon (European Commission, 2000)
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Accés obert3G systems are designed for support of a brand new set of services (like location based services) thus, the capability to evaluate their provision in the laboratory is mandatory for their deployment. The IST WINEGLASS ... -
Analysis and design of the second order delay-lock loop in a CDMA system
Olmos Bonafé, Juan José; Agustí Comes, Ramon (. VEHICULAR TECHNOLOGY CONFERENCE'92, 1992)
Text en actes de congrés
Accés obertIn code-division multiple access (CDMA) systems a delay-lock loop (DLL) is used to keep a fine alignment between sequences. A simulation program for the second-order DLL has been developed. The program allows an optimum ... -
Analysis of a type II hybrid ARQ strategy in a DS-CDMA packet transmission environment
Pérez Romero, Jordi; Agustí Comes, Ramon; Sallent Roig, Oriol (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 ... -
Analysis of prediction diversity TCM-MPSK and postdetection diversity TCM-MDPSK systems on a Rayleigh fading channel
Femenias Nadal, Guillem; Agustí Comes, Ramon (IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 1995-02)
Article
Accés obertIn this paper, the bit error rate (BER) performance of predetection diversity trellis coded multilevel phase shift keying (TCM-MPSK) and postdetection diversity trellis coded multilevel differential phase shift keying ...