• DocumentCode
    1334482
  • Title

    Butterfly Log-MAP decoding algorithm

  • Author

    Hou, Jia ; Lee, Moon Ho ; Kim, Chang Joo

  • Author_Institution
    Institute of Information & Communication, Chonbuk National University, Chonju, 561-756, Korea
  • Volume
    6
  • Issue
    3
  • fYear
    2004
  • Firstpage
    209
  • Lastpage
    215
  • Abstract
    In this paper, a butterfly Log-MAP decoding algorithm for turbo code is proposed. Different from the conventional turbo decoder, we derived a generalized formula to calculate the log-likelihood ratio (LLR) and drew a modified butterfly states diagram in 8-states systematic turbo coded system. By comparing the complexity of conventional implementations, the proposed algorithm can efficiently reduce both the computations and work units without bit error ratio (BER) performance degradation.
  • Keywords
    Complexity theory; Computer architecture; Decoding; Graphics; Measurement; Systematics; Turbo codes; E-function; Log-MAP; turbo code;
  • fLanguage
    English
  • Journal_Title
    Communications and Networks, Journal of
  • Publisher
    ieee
  • ISSN
    1229-2370
  • Type

    jour

  • DOI
    10.1109/JCN.2004.6596577
  • Filename
    6596577
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1334482