Exploració per autor "Um, Laurence Emilie"

Ara es mostren els items 1-13 de 13

    • A contribution to the theory of convolutional codes from systems theory piont of view 

      Um, Laurence Emilie (Universitat Politècnica de Catalunya, 2015-05-25)
      Tesi
      Accés obert
      Realitzat a/amb:   Jāmiʻat Muḥammad al-Khāmis
      Information is such a valuable good of our time. Given that the transmission of information has always been subject to precision problems, knowing the obstacles existing between the transmitter and the receiver, eventual ...

    • Analysis of control properties of concatenated convolutional codes 

      García Planas, María Isabel; Souidi, El Mamoun; Um, Laurence Emilie (2012)
      Article
      Accés obert
      In this paper we consider two models of concatenated convolutional codes from the perspective of linear systems theory. We present an input-state-output representation of these models and we study the conditions for ...

    • Analysis of control properties]{Analysis of control properties of convolutional concatenated codes under linear systems point of view 

      García Planas, María Isabel; Um, Laurence Emilie; Souidi, El Mamoun (2013)
      Text en actes de congrés
      Accés obert
      In this paper we consider two models of concatenated convolutional codes from the perspective of linear systems theory. We present an input-state-output representation of these models and we study the conditions for ...

    • Convolutional code theory based steganography technique 

      García Planas, María Isabel; Um, Laurence Emilie (2022-03-11)
      Article
      Accés obert
      Steganography, as it is known, is a technique to hide a secret message within a message or collection of data that is not secret, and a problem in mathematics is to decipher the secret included in the message, to solve ...

    • Convolutional codes and steganography under linear systems theoretical point of view 

      García Planas, María Isabel; Um, Laurence Emilie; Soudi, El Mamoun; El Jouhari, Houda (2020-11)
      Article
      Accés obert
      In this work, we introduce an application of convolutional coding theory in steganography. As it is known, block codes are largely used for dissimulation of information using the steganographic process. Here, we suggest a ...

    • Convolutional codes under control theory point of view. Analysis of output-observability 

      García Planas, María Isabel; Souidi, El Mamoun; Um, Laurence Emilie (WSEAS Press, 2013)
      Capítol de llibre
      Accés obert
      In this work we make a detailed look at the algebraic structure of convolutional codes using techniques of linear systems theory. The connection between these concepts help to better understand the properties of ...

    • Convolutional codes under linear systems point of view. Analysis of output-controllability 

      García Planas, María Isabel; Souidi, El Mamoun; Um, Laurence Emilie (WSEAS Press. World Scientific and Engineering Academy and Society, 2012)
      Article
      Accés obert
      In this work we make a detailed look at the algebraic structure of convolutional codes using techniques of linear systems theory. In particular we study the input-state-output representation of a convolutional code. ...

    • Códigos de convolución desde el punto de vista de teoría de control. Análisis de la observabilidad 

      García Planas, María Isabel; Tarragona Romero, Sonia; Um, Laurence Emilie (2014-04-30)
      Article
      Accés obert
      En este trabajo se realiza un estudio detallado de la estructura algebraica de los códigos de convolución empleando técnicas de la teoría de sistemas lineales. La conexión entre estos conceptos ayuda a comprender ...

    • Códigos monomiales vistos como subespacios vectoriales invariantes 

      García Planas, María Isabel; Magret Planas, Maria dels Dolors; Um, Laurence Emilie (2015)
      Text en actes de congrés
      Accés obert
      Es bien sabido que los códigos cíclicos son muy útiles en aplicaciones en general y a los criptosistemas en particular, ya que no resultan costosos desde un punto de vista computacional, además estos códigos alcanzan la ...

    • Decoding algorithm for convolutional codes under linear systems point of view 

      García Planas, María Isabel; Souidi, El Mamoun; Um, Laurence Emilie (WSEAS Press, 2014)
      Text en actes de congrés
      Accés obert
      In this work the output-observability of convolutional codes is examined and a decoding algorithm for convolutional codes using linear algebra techniques is presented.

    • Error correcting codes under linear systems point of view 

      Um, Laurence Emilie; Souidi, El Mamoun; García Planas, María Isabel (2011-09-05)
      Report de recerca
      Accés obert
      In this work we make a detailed look at the algebraic structure of convolutional codes using techniques of linear systems theory. In particular we study the inputstate- output representation of a convolutional code. We ...

    • Monomial codes seen as invariant subspaces 

      García Planas, María Isabel; Magret Planas, Maria dels Dolors; Um, Laurence Emilie (2017)
      Article
      Accés obert
      It is well known that cyclic codes are very useful because of their applications, since they are not computationally expensive and encoding can be easily implemented. The relationship between cyclic codes and invariant ...

    • Sufficient conditions for controllability and observability of serial and parallel concatenated linear systems 

      García Planas, María Isabel; Domínguez García, José Luis; Um, Laurence Emilie (2014-11-30)
      Article
      Accés obert
      This paper deals with the sufficient conditions for controllability and observability characters of finitedimensional linear continuous-time-invariant systems of serial and parallel concatenated systems. The obtained ...