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Design of Rate-Compatible Irregular LDPC Codes for Incremental Redundancy Hybrid ARQ Systems

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4 Author(s)
Jaehong Kim ; School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, U.S.A. E-mail: ; Woonhaing Hur ; Aditya Ramamoorthy ; Steven W. McLaughlin

We present a new class of irregular low-density parity-check (LDPC) codes for finite block length (up to a few thousand symbols). The proposed codes are efficiently encodable and have a simple rate-compatible puncturing structure which is suitable for incremental redundancy hybrid automatic repeat request (IR-HARQ) systems. The codes outperform optimized irregular LDPC codes and (extended) irregular repeat-accumulate codes for rates 0.67-0.94, and are particularly good at high puncturing rates where good puncturing performance has been previously difficult to achieve. These characteristics result in good throughput performance over time-varying channels in IR-HARQ systems

Published in:

2006 IEEE International Symposium on Information Theory

Date of Conference:

9-14 July 2006