• DocumentCode
    1980537
  • Title

    Numerical issues affecting LDPC error floors

  • Author

    Butler, Brian K. ; SIEGEL, Peter H.

  • Author_Institution
    Dept. of Electr. & Comput. Eng., Univ. of California San Diego, La Jolla, CA, USA
  • fYear
    2012
  • fDate
    3-7 Dec. 2012
  • Firstpage
    3201
  • Lastpage
    3207
  • Abstract
    Numerical issues related to the occurrence of error floors in floating-point simulations of belief propagation (BP) decoders are examined. Careful processing of messages corresponding to highly-certain bit values can sometimes reduce error floors by several orders of magnitude. Computational solutions for properly handling such messages are provided for the sum-product algorithm (SPA) and several variants.
  • Keywords
    codecs; floating point arithmetic; parity check codes; LDPC; belief propagation decoders; error floors; floating-point simulations; message processing; numerical issues; sum-product algorithm;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Global Communications Conference (GLOBECOM), 2012 IEEE
  • Conference_Location
    Anaheim, CA
  • ISSN
    1930-529X
  • Print_ISBN
    978-1-4673-0920-2
  • Electronic_ISBN
    1930-529X
  • Type

    conf

  • DOI
    10.1109/GLOCOM.2012.6503607
  • Filename
    6503607
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1980537