The design of efficiently-encodable rate-compatible LDPC codes - [transactions papers] |
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Authors: | Kim J Ramamoorthy A Mclaughlin SW |
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Affiliation: | is with Samsung Electronics Co., Ltd., Yongin-Si, Korea (e-mail:onil@samsung.com).; |
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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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