Now showing items 1-20 of 31

    • A vulnerability factor for ECC-protected memory 

      Jaulmes, Luc; Moreto Planas, Miquel; Valero Cortés, Mateo; Casas, Marc (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Open Access
      Fault injection studies and vulnerability analyses have been used to estimate the reliability of data structures in memory. We survey these metrics and look at their adequacy to describe the data stored in ECC-protected ...
    • Additive MDS Codes 

      Gamboa Quintero, Guillermo Andres (Universitat Politècnica de Catalunya, 2020-10)
      Master thesis
      Restricted access - author's decision
      In this master thesis, we present examples of additive nonlinear MDS codes over nonprime fields. Moreover, we prove the MDS conjecture for additive nonlinear codes for the alphabets F9 and F16, preserving linearity over ...
    • Array codes and graph decompositions 

      Vilar Algueró, Ricard (Universitat Politècnica de Catalunya, 2019-01)
      Bachelor thesis
      Open Access
      Array codes are intended to correct bursts of errors in communication through noisy channels. As in regular codes there is a notion of maximum distance separating (MDS) array codes. A so-called Perfect One-Factorization ...
    • Asymptotic MAP upper bounds for LDPC codes 

      Matas Navarro, David; Lamarca Orozco, M. Meritxell (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Open Access
      This paper aims at computing tight upper bounds for the maximum a posteriori threshold of low-density parity check codes in the asymptotic blocklength regime for the transmission over binary-input memoryless symmetricoutput ...
    • Codes correcteurs d’erreurs pour un système de télérelevé entre compteurs électriques 

      Ruiz del Rio, Patricia (Universitat Politècnica de Catalunya, 2009)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      Covenantee:   École nationale supérieure des télécommunications de Bretagne / Itron
      Deux systèmes de communications à des bandes de fréquences de 915MHz et 2.4GHz sont étudiés dans ce document. Tout d’abord une étude bibliographique de certains codes correcteurs d’erreurs a été effectuée afin de présenter ...
    • Decodificación de canal asistida por protocolo 

      Moreno Lozano, Daniel (Universitat Politècnica de Catalunya, 2016)
      Master thesis (pre-Bologna period)
      Open Access
      This document describes how the channel decoder at Physical layer of a communication system can benefit from information brought either by careful examination of the standard, or by already received packets. In all ...
    • Determining when a truncated generalised Reed-Solomon code is Hermitian self-orthogonal 

      Ball, Simeon Michael; Vilar Algueró, Ricard (Institute of Electrical and Electronics Engineers (IEEE), 2022-02-09)
      Article
      Open Access
      We prove that there is a Hermitian self-orthogonal k -dimensional truncated generalised Reed-Solomon code of length n¿q2 over Fq2 if and only if there is a polynomial g¿Fq2 of degree at most (q-k)q-1 such that g+gq has ...
    • Development and evaluation in AVInspector 

      Soler Garcia, José Alberto (Universitat Politècnica de Catalunya, 2011-12-20)
      Bachelor thesis
      Restricted access - author's decision
      AVInspector is a software developed at Fraunhofer IDMT that allows analysis and detection of audio and video errors. The software consists of several independent modules for every kind of error and a GUI which manages the ...
    • Error estimation and quality control 

      Díez, Pedro; Parés Mariné, Núria; Huerta, Antonio (John Wiley & sons, 2010-12-15)
      Part of book or chapter of book
      Restricted access - publisher's policy
    • Evaluating built-in ECC of FPGA on-chip memories for the mitigation of undervolting faults 

      Salami, Behzad; Unsal, Osman Sabri; Cristal Kestelman, Adrián (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Conference report
      Open Access
      Voltage underscaling below the nominal level is an effective solution for improving energy efficiency in digital circuits, e.g., Field Programmable Gate Arrays (FPGAs). However, further undervolting below a safe voltage ...
    • Exploiting asynchrony from exact forward recovery for DUE in iterative solvers 

      Jaulmes, Luc; Casas Guix, Marc; Moreto Planas, Miquel; Ayguadé Parra, Eduard; Labarta Mancho, Jesús José; Valero Cortés, Mateo (Association for Computing Machinery (ACM), 2015)
      Conference report
      Open Access
      This paper presents a method to protect iterative solvers from Detected and Uncorrected Errors (DUE) relying on error detection techniques already available in commodity hardware. Detection operates at the memory page ...
    • Exploiting asynchrony from exact forward recovery for DUE in iterative solvers 

      Jaulmes, Luc; Casas Guix, Marc; Moreto Planas, Miquel; Ayguadé Parra, Eduard; Labarta Mancho, Jesús José; Valero Cortés, Mateo (2015)
      Research report
      Open Access
      This paper presents a method to protect iterative solvers from Detected and Uncorrected Errors (DUE) relying on error detection techniques already available in commodity hardware. Detection operates at the memory page ...
    • Étude d’un émetteur-récepteur faster-than-Nyquist de faible complexité pour les communications par satellite 

      Abelló Barberán, Albert (Universitat Politècnica de Catalunya, 2015-10-01)
      Master thesis (pre-Bologna period)
      Open Access
      Covenantee:   Institut Supérieur de l'Aéronautique et de l'Espace
      Capacity increase in satelite communications systems is nowadays a main concern. In order to increase the spectral efficiency of such systems, a research topic consists in specifying non-orthogonal modulations called ...
    • Generalized perfect codes for symmetric classical-quantum channels 

      Blasco Coll, Andreu; Vázquez Vilar, Gonzalo; Rodríguez Fonollosa, Javier (Institute of Electrical and Electronics Engineers (IEEE), 2022-09)
      Article
      Open Access
      We define a new family of codes for symmetric classical-quantum channels and establish their optimality. To this end, we extend the classical notion of generalized perfect and quasi-perfect codes to channels defined over ...
    • Goal-oriented h-adaptivity for the Helmholtz equation: error estimates, local indicators and refinement strategies 

      Steffens, Lindaura; Parés Mariné, Núria; Díez, Pedro (2011-01-14)
      Article
      Open Access
      This paper introduces a new goal-oriented adaptive technique based on a simple and effective post-process of the finite element approximations. The goal-oriented character of the estimate is achieved by analyzing both the ...
    • Low density parity check codes 

      Ortega Sánchez-Colomer, Tomás (Universitat Politècnica de Catalunya, 2021-07)
      Master thesis
      Open Access
      Low Density Parity Check codes, LDPCs for short, are a family of codes which have shown near optimal error-correcting capabilites. They were proposed in 1963 by Robert Gallager in his PhD thesis. While he proved that ...
    • Maximum distance separable codes 

      Albanell Sarroca, Elisabeth (Universitat Politècnica de Catalunya, 2014-10)
      Bachelor thesis
      Open Access
      The focus of this bachelor thesis are maximum distance separable codes. A code is used to communicate over noise channel so any interferences that may occur can be detected and corrected. Maximum distance separable codes ...
    • MDS array codes and perfect factorizations of graphs 

      Vilar Algueró, Ricard (Universitat Politècnica de Catalunya, 2020-07)
      Master thesis
      Restricted access - author's decision
      Array Codes form a class of Error Correcting Codes which are specifically designed to deal with natural types of errors in communication devices which appear in clusters as opposite to randomly scattered within the string ...
    • On non-binary traceability set systems 

      Egorova, Elena; Fernández Muñoz, Marcel; Kabatiansky, Grigory (2020-03-19)
      Article
      Open Access
      We introduce non-binary IPP set systems with traceability properties that have IPP codes and binary IPP set systems with traceability capabilities as particular cases. We prove an analogue of the Gilbert–Varshamov bound ...
    • On PGZ decoding of alternant codes 

      Farré Cirera, Rafael; Sayols Baixeras, Narcís; Xambó Descamps, Sebastián (2019-03-01)
      Article
      Open Access
      In this paper, we first review the classical Petterson–Gorenstein–Zierler decoding algorithm for the class of alternant codes, which includes Reed–Solomon, Bose–Chaudhuri–Hocquenghem and classical Goppa codes. Afterwards, ...