The Design of Efficiently-Encodable Rate-Compatible LDPC Codes

Date
2009-02-01
Authors
Kim, Jaehong
Ramamoorthy, Aditya
McLaughlin, Steven
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Abstract

We present a new class of irregular low-density parity-check (LDPC) codes for moderate block lengths (up to a few thousand bits) that are well-suited for rate-compatible puncturing. The proposed codes show good performance under puncturing over a wide range of rates and are suitable for usage in incremental redundancy hybrid-automatic repeat request (ARQ) systems. In addition, these codes are linear-time encodable with simple shift-register circuits. For a block length of 1200 bits the codes outperform optimized irregular LDPC codes and extended irregular repeat-accumulate (eIRA) codes for all puncturing rates 0.6~0.9 (base code performance is almost the same) and are particularly good at high puncturing rates where good puncturing performance has been previously difficult to achieve.

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This is a manuscript of an article from IEEE Transactions on Communications 59 (2009): 365, doi: 10.1109/TCOMM.2009.02.060233. Posted with permission.

Keywords
Efficient encoding, low-density parity-check (LDPC) code, puncturing, rate-compatible code
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