Now showing items 21-40 of 40

    • Investigating imperfect cloning for extending quantum communication capabilities 

      Iqbal, Masab; Velasco Esteban, Luis Domingo; Costa, Nelson; Napoli, Antonio; Pedro, João; Ruiz Ramírez, Marc (Multidisciplinary Digital Publishing Institute (MDPI), 2023-09-14)
      Article
      Open Access
      Quantum computing allows the implementation of powerful algorithms with enormous computing capabilities and promises a secure quantum Internet. Despite the advantages brought by quantum communication, certain communication ...
    • 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 additive MDS codes over small fields 

      Ball, Simeon Michael; Gamboa Jimenez, Gonzalo; Lavrauw, Michel (American Institute of Mathematical Sciences, 2022)
      Article
      Open Access
      Let $ C $ be a $ (n,q^{2k},n-k+1)_{q^2} $ additive MDS code which is linear over $ {\mathbb F}_q $. We prove that if $ n \geq q+k $ and $ k+1 $ of the projections of $ C $ are linear over $ {\mathbb F}_{q^2} $ then $ C $ ...
    • On additive MDS codes with linear projections 

      Adriaensen, Sam; Ball, Simeon Michael (Elsevier, 2023-10-01)
      Article
      Open Access
      We support some evidence that a long additive MDS code over a finite field must be equivalent to a linear code. More precisely, let C be an -linear MDS code over . If , , , and C has three coordinates from which its ...
    • 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, ...
    • Optimization of Random Linear Network Coding protocols for multipath communications in heterogeneous networks 

      Costa Sala, Clara (Universitat Politècnica de Catalunya, 2019-04-25)
      Bachelor thesis
      Open Access
      Covenantee:   Technische Universität Dresden
      In the next upcoming mobile generation era (5G), the demands for high-data-rate transmissions is predicted to grow considerably. Among new studies focused on how to support such demands, Random Linear Network Coding (RLNC) ...
    • Performance of direct-oversampling correlator-type receivers in chaos-based DS-CDMA systems over frequency non-selective fading channels 

      Nguyen, Xuan Quyen; Barlet Ros, Pere (2017-03-08)
      Article
      Open Access
      In this paper, we present a study on the performance of direct-oversampling correlator-type receivers in chaos-based direct-sequence code division multiple access systems over frequency non-selective fading channels. At ...
    • Runtime-guided ECC protection using online estimation of memory vulnerability 

      Jaulmes, Luc; Moretó Planas, Miquel; Valero Cortés, Mateo; Erez, Mattan; Casas, Marc (Institute of Electrical and Electronics Engineers (IEEE), 2020)
      Conference report
      Open Access
      Diminishing reliability of semiconductor technologies and decreasing power budgets per component hinder designing next-generation high performance computing (HPC) systems. Both constraints strongly impact memory subsystems, ...
    • Signature codes for weighted noisy adder channel, multimedia fingerprinting and compressed sensing 

      Egorova, Elena; Fernández Muñoz, Marcel; Kabatiansky, Grigory; Moon Ho, Lee (2019-03-01)
      Article
      Open Access
      We propose a new approach to construct noise-resistant multimedia fingerprinting codes. Our approach is based on the theory of the signature codes for multiple access channels, mainly, for a weighted noisy adder channel. ...
    • SRAM arrays with built-in parity computation for real-time error detection in cache tag arrays 

      Canal Corretger, Ramon; Sazeides, Yiannakis; Bramnik, Arkady (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Conference report
      Open Access
      This work proposes an SRAM array with built-in real-time error detection (RTD) capabilities. Each cell in the new RTD-SRAM array computes its part of the real-time parity of an SRAM array column on-the-fly. RTD based arrays ...
    • State estimation and decoupling of unknown inputs in uncertain LPV systems using interval observers 

      Rotondo, Damiano; Cristofaro, Andrea; Johansen, Tor Arne; Nejjari Akhi-Elarab, Fatiha; Puig Cayuela, Vicenç (2017-06-13)
      Article
      Open Access
      This paper proposes a linear parameter varying (LPV) interval observer for state estimation and unknown inputs decoupling in uncertain continuous-time LPV systems. Two different problems are considered and solved: (1) the ...
    • The equivalence of codes 

      Dixon, James Edward (Universitat Politècnica de Catalunya, 2021-07)
      Master thesis
      Open Access
      When discussing equivalent codes, the literature tends to define equivalence differently for linear or nonlinear codes. For non-linear codes, one normally defines equivalence based on a permutation of coordinates and ...
    • The equivalence of linear codes implies semi-linear equivalence 

      Ball, Simeon Michael; Dixon, James (2022-07-01)
      Article
      Open Access
      We prove that if two linear codes are equivalent then they are semi-linearly equivalent. We also prove that if two additive MDS codes over a field are equivalent then they are additively equivalent.
    • The geometry of Hermitian self-orthogonal codes 

      Ball, Simeon Michael; Vilar Algueró, Ricard (Springer, 2021-12-20)
      Article
      Open Access
      We prove that if n>k2 then a k-dimensional linear code of length n over Fq2 has a truncation which is linearly equivalent to a Hermitian self-orthogonal linear code. In the contrary case we prove that truncations of linear ...
    • The geometry of quantum codes 

      Puig Pericas, Pablo (Universitat Politècnica de Catalunya, 2021-07)
      Master thesis
      Open Access
      Quantum particles are continuously interacting with the environment hence quantum information is always susceptible to errors. Consequently when encoding information into quantum bits a special treatment is required such ...
    • Understanding error control coding 

      Sanvicente Gargallo, Emilio (Springer, 2019)
      Book
      Restricted access - publisher's policy
      This book is addressed to newcomers to error control coding (ECC), making the subject easy to understand and to apply in a variety of cases. The book begins by presenting in a detailed, step-by-step manner the plethora ...
    • Use of Turbo Codes with Low-Rate Convolutional Constituent Codes in Fingerprinting Scenarios 

      Tomás Buliart, Joan; Gómez Muro, Ana; Fernández Muñoz, Marcel; Soriano Ibáñez, Miguel (IEEE, 2011)
      Conference lecture
      Restricted access - publisher's policy
      We discuss the use of turbo codes in fingerprinting schemes. More precisely, we present a family of turbo codes that are secure against attacking coalitions of size 2. This family is build upon a class of low-rate convolutional ...