LDPC code design for asynchronous Slepian-Wolf coding

  • Authors:
  • Zhibin Sun;Chao Tian;Jun Chen;Kon Max Wong

  • Affiliations:
  • Hydro One Networks Inc., Toronto, ON, Canada and Department of Electrical and Computer Engineering, McMaster University, Hamilton, ON, Canada;AT&T Labs-Research, Florham Park, NJ;Department of Electrical and Computer Engineering, McMaster University, Hamilton, ON, Canada;Department of Electrical and Computer Engineering, McMaster University, Hamilton, ON, Canada

  • Venue:
  • IEEE Transactions on Communications
  • Year:
  • 2010

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Abstract

We consider asynchronous Slepian-Wolf coding where the two encoders may not have completely accurate timing information to synchronize their individual block code boundaries, and propose LDPC code design in this scenario. A new information-theoretic coding scheme based on source splitting is provided, which can achieve the entire asynchronous Slepian-Wolf rate region. Unlike existing methods based on source splitting, the proposed scheme does not require common randomness at the encoder and the decoder, or the construction of super-letter from several individual symbols. We then design LDPC codes based on this new scheme, by applying the recently discovered source-channel code correspondence. Experimental results validate the effectiveness of the proposed method.