Now showing items 1-20 of 40

    • A deep reinforcement learning approach for optimization and task-offloading of mobile edge computing in virtual radio access networks 

      Biosca Caro, Jordi (Universitat Politècnica de Catalunya, 2020-10-15)
      Master thesis
      Open Access
      Covenantee:   Technische Universiteit Eindhoven
      Mobile systems are increasing in number and, in the future, exponential growth is expected with the deployment of new technologies like 5G and Internet of Things. Requirements from those technologies lead to an improvement ...
    • A multi-frequency SDR-based GBSAR: System overview and first results 

      Amézaga Sarries, Adrià; López Martínez, Carlos; Jové Casulleras, Roger (Multidisciplinary Digital Publishing Institute (MDPI), 2021-04-21)
      Article
      Open Access
      This work describes a system-level overview of a multi-frequency GBSAR built around a high performance software defined radio (SDR). The main goal of the instrument is to be employed as a demonstrator and experimental ...
    • A new vision of software defined radio: from academic experimentation to industrial explotation 

      Boncompte vilaró, Teresa (Universitat Politècnica de Catalunya / Università degli Studi de Trento, 2011)
      Master thesis (pre-Bologna period)
      Open Access
      The broad objective of this study is to examine the role of Software Defined Radio in an industrial field. Basically examines the changes that have to be done to achieve moving this technology in a commercial domain. It ...
    • A radio spectrum measurement platform for spectrum surveying in cognitive radio 

      López Benítez, Miguel; Casadevall Palacio, Fernando José (2011)
      Conference report
      Restricted access - publisher's policy
      This paper presents a sophisticated radio spectrum measurement platform specifically envisaged and designed for spectrum occupancy surveys in the context of Dynamic Spectrum Access/Cognitive Radio (DSA/CR). The presented ...
    • A software radio challenge accelerating education and innovation in wireless communications 

      González Rodríguez, Marta; Gelonch Bosch, Antonio José; Marojevic, Vuk (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Conference lecture
      Restricted access - publisher's policy
      This Innovative Practice Full Paper presents our methodology and tools for introducing competition in the electrical engineering curriculum to accelerate education and innovation in wireless communications. Software radio ...
    • Cosmic Call Tech – A hands-on space radio workshop for students in secondary education 

      Lobas, Stefan; Geisler, Mario; Fischer, Frank (Universitat Politècnica de Catalunya, 2022-04-29)
      Conference lecture
      Open Access
      The DLR_School_Lab Braunschweig, Germany, organized an amateur radio contact with an astronaut on board the International Space Station (ISS) for students from five different schools for the third time. While the contact ...
    • Defining a network management architecture 

      Jiménez Agudelo, Yury Andrea; Cervelló Pastor, Cristina; García García, Aurelio Javier (Institute of Electrical and Electronics Engineers (IEEE), 2013)
      Conference report
      Restricted access - publisher's policy
      This work proposes an algorithm called k-Critical Node to solve the controller placement problem in Software Defined Networks. K-Critical finds the minimum number of controllers to satisfy a target communication delay ...
    • Diseño y realización de una radio definida por software 

      Franco Giraldez, Victor (Universitat Politècnica de Catalunya, 2023-07-11)
      Bachelor thesis
      Open Access
      Una radio definida por software es un dispositivo que, en lugar de decodificar las señales de radio mediante circuitos electrónicos específicos, utiliza el procesamiento digital de señales. El propósito de este proyecto ...
    • Dynamic resource allocation in software-defined radio - The interrelation between platform architecture and application mapping 

      Marojevic, Vuk; Revés Ballesté, Xavier; Gelonch Bosch, Antonio José (2006-09)
      Article
      Open Access
    • Empirical Time-Dimension Model of Spectrum Use Based on a Discrete-Time Markov Chain With Deterministic and Stochastic Duty Cycle Models 

      López Benítez, Miguel; Casadevall Palacio, Fernando José (2011-07)
      Article
      Restricted access - publisher's policy
      The spectrum occupancy models widely used to date in dynamic spectrum access/cognitive radio (DSA/CR) research frequently rely on assumptions and oversimplifications that have not been validated with empirical measurement ...
    • Evaluación de una estación base LTE basado en software 

      Liu, Holmes (Universitat Politècnica de Catalunya, 2016-07-04)
      Master thesis (pre-Bologna period)
      Open Access
      In the early 90s, the GSM standard was introduced in Europe with an important carrier-side investment in order to deliver a digital service to the home user. Back then there was no functionality bundling in contrast to the ...
    • Implementació d'una SDR (Software Defined Radio) sobre Raspberry PI 

      Lladó Maldonado, Marc (Universitat Politècnica de Catalunya, 2018-10-29)
      Bachelor thesis
      Restricted access - author's decision
    • Implementation of the Physical Random Access Channel in TDD-LTE using Software Defined Radio 

      Tiati Dang, Daniel Stephane (Universitat Politècnica de Catalunya, 2016-02-08)
      Bachelor thesis
      Open Access
      Covenantee:   Aalto-yliopisto. Sähkötekniikan korkeakoulu
      In Long Term Evolution (LTE) uplink transmission, a User Equipment (UE) must be time-synchronized before normal data transmission. So that a Physical Random Access Channel (PRACH) becomes a crucial factor for LTE access ...
    • Interference management in cognitive radio systems 

      Pardina Garcia, Ivan (Universitat Politècnica de Catalunya, 2011-03-04)
      Master thesis
      Open Access
      Currently, the radio spectrum is beginning to be crowded due to the rapid growth of wireless technologies this century. However, many studies show that the major licensed bands, such as those allocated for television ...
    • Joint learning-detection framework: an empirical analysis 

      López Benítez, Miguel; Pérez Romero, Jordi (2011)
      Conference report
      Restricted access - publisher's policy
      Within a context of Cognitive Radio, we explore the possibility to detect the presence of users on a given band with no a priori knowledge on the environment. This paper ventures the analysis of a joint learning-detection ...
    • LTE downlink physical layer processing chain SDR application acceleration with GPUs 

      Arteaga Martínez, Xavier (Universitat Politècnica de Catalunya, 2012-07-13)
      Bachelor thesis
      Open Access
      The technology moves fast and the wireless systems tend to be software defined radio (SDR). The new wireless standards increase the efficiency of communications, also its complexity, which demand more processing. The ...
    • Machine learning techniques applied to multiband spectrum sensing in cognitive radios 

      Molina Tenorio, Yanqueleth; Prieto Guerrero, Alfonso; Aguilar Gomez, Rafael; Ruiz Boqué, Sílvia (Multidisciplinary Digital Publishing Institute (MDPI), 2019-10-30)
      Article
      Open Access
      In this work, three specific machine learning techniques (neural networks, expectation maximization and k-means) are applied to a multiband spectrum sensing technique for cognitive radios. All of them have been used as a ...
    • Modeling and simulation of joint time-frequency properties of spectrum usage in cognitive radio 

      Casadevall Palacio, Fernando José; López Benítez, Miguel; López Pérez, David Orencio; Vasilakos, Athanasios V. (2011)
      Conference report
      Restricted access - publisher's policy
      The development of the Dynamic Spectrum Access/Cogni- tive Radio (DSA/CR) technology can signi cantly bene t from the availability of realistic models able to accurately capture and reproduce the statistical properties ...
    • Multiantenna spectrum sensing exploiting spectral a priori information 

      Vázquez Vilar, Gonzalo; López Valcarce, Roberto; Sala Álvarez, José (2011-12)
      Article
      Restricted access - publisher's policy
      Dynamic Spectrum Access (DSA) is receiving considerable interest as a means to improve spectral usage in licensed bands. In order to avoid interference to licensed users, spectrum sensing has emerged as an enabling technology ...
    • On the spectrum occupancy perception of cognitive radio terminals in realistic scenarios 

      López Benítez, Miguel; Casadevall Palacio, Fernando José (2010)
      Conference report
      Restricted access - publisher's policy
      Cognitive radio terminals sense the spectrum to detect temporarily unoccupied spectrum gaps and transmit. The behavior of a network of cognitive radio terminals therefore depends on the spectrum occupancy perceived by ...