Open Access

Generalized Punctured Convolutional Codes with Unequal Error Protection

  • Cecilio Pimentel1,
  • Richard Demo Souza2Email author,
  • Bartolomeu F. Uchôa-Filho3 and
  • Marcelo Eduardo Pellenz4
EURASIP Journal on Advances in Signal Processing20082008:280831

https://doi.org/10.1155/2008/280831

Received: 22 July 2008

Accepted: 29 October 2008

Published: 11 November 2008

Abstract

We conduct a code search restricted to the recently introduced class of generalized punctured convolutional codes (GPCCs) to find good unequal error protection (UEP) convolutional codes for a prescribed minimal trellis complexity. The trellis complexity is taken to be the number of symbols per information bit in the "minimal" trellis module for the code. The GPCC class has been shown to possess codes with good distance properties under this decoding complexity measure. New good UEP convolutional codes and their respective effective free distances are tabulated for a variety of code rates and "minimal" trellis complexities. These codes can be used in several applications that require different levels of protection for their bits, such as the hierarchical digital transmission of video or images.

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Authors’ Affiliations

(1)
Department of Electronics and Systems, Federal University of Pernambuco (UFPE)
(2)
Department of Electronics, Federal Technological University of Paraná (UTFPR)
(3)
Department of Electrical Engineering, Federal University of Santa Catarina (UFSC)
(4)
Graduate Program in Computer Science, Pontifical Catholic University of Paraná (PUCPR)

Copyright

© Cecilio Pimentel et al. 2008

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.