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  • Research Article
  • Open Access

Construction of Rate-Compatible LDPC Codes Utilizing Information Shortening and Parity Puncturing

EURASIP Journal on Wireless Communications and Networking20052005:692121

https://doi.org/10.1155/WCN.2005.789

  • Received: 27 January 2005
  • Published:

Abstract

This paper proposes a method for constructing rate-compatible low-density parity-check (LDPC) codes. The construction considers the problem of optimizing a family of rate-compatible degree distributions as well as the placement of bipartite graph edges. A hybrid approach that combines information shortening and parity puncturing is proposed. Local graph conditioning techniques for the suppression of error floors are also included in the construction methodology.

Keywords

  • rate compatibility
  • shortened codes
  • punctured codes
  • irregular low-density parity-check codes
  • density evolution
  • extrinsic message degree

Authors’ Affiliations

(1)
QUALCOMM Incorporated, San Diego, CA 92121, USA
(2)
Jet Propulsion Laboratory, California Institute of Technology, NASA, CA, 91109, USA

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