• openAccess   A new class of superregular matrices and MDP convolutional codes 

      Almeida, P.; Napp Avelli, Diego Oscar; Pinto, R. Elsevier (2013)
      This paper deals with the problem of constructing superregular matrices that lead to MDP convolutional codes. These matrices are a type of lower block triangular Toeplitz matrices with the property that all the square ...
    • openAccess   Positivity of discrete singular systems and their stability: An LP-based approach 

      Napp Avelli, Diego Oscar; Ait Rami, Mustapha Elsevier (2014-01)
      In this paper we present an efficient approach to the analysis of discrete positive singular systems. One of our main objectives is to investigate the problem of characterizing positivity of such systems. Previously, this ...