Now showing items 9-13 of 13

  • Non-linear graph-based codes for joint source-channel coding 

    Matas Navarro, David; Lamarca Orozco, M. Meritxell; García Frías, Javier (2010)
    Conference report
    Open Access
    We study the behavior of a new family of nonlinear graph-based codes, previously introduced for compression of asymmetric binary memoryless sources, for the joint source-channel coding scenario in which the codewords are ...
  • Non-linear graph-based codes for source coding 

    Matas Navarro, David; Lamarca Orozco, M. Meritxell; García Frías, Javier (2009)
    Conference report
    Open Access
    We introduce a new family of graph-based source codes that can be regarded as a nonlinear generalization of LDPC codes, and apply them to the compression of asymmetric binary memoryless sources. Simulation results and the ...
  • Optimum power allocation and bit loading for BICM systems 

    Matas Navarro, David; Lamarca Orozco, M. Meritxell (2010-07-01)
    Article
    Open Access
    This paper introduces a joint bit loading and power allocation algorithm for systems combining bit-interleaved coded modulation (BICM) with multicarrier transmission. The proposed algorithm maximizes the mutual information, ...
  • Optimum power allocation and bit loading with code rate constraints 

    Matas Navarro, David; Lamarca Orozco, M. Meritxell (2009)
    Conference report
    Open Access
    In this paper, a new power allocation and bit loading policy is defined for those systems working with a preselected binary channel code and specific bit error rate (BER) requirements. It consists on the maximization of ...
  • Proyecto AVANT. Estudio de técnicas de sincronización para relaciones señal a ruido muy bajas. D12. Disseny i simulació dels algorismes de sincronització 

    Villares Piera, Nemesio J.; Font Segura, Josep; Lamarca Orozco, M. Meritxell; Matas Navarro, David; Ramírez Javega, Francisco; Rey Micolau, Francesc; Riba Sagarra, Jaume; Sala Álvarez, José; Vázquez Grau, Gregorio (2010-07-16)
    External research report
    Restricted access - confidentiality agreement
    In this document, the synchronization algorithms developed during the project are presented and simulated. The studied algorithms are designed for a QS-CDMA system operating in the low SNR regime, i.e., at low Es/No values ...