Efficiently-Encodable Rate-Compatible LDPC Codes

Conference: TURBO - CODING - 2006 - 4th International Symposium on Turbo Codes & Related Topics; 6th International ITG-Conference on Source and Channel Coding
04/03/2006 - 04/07/2006 at Munich, Germany

Proceedings: TURBO - CODING - 2006

Pages: 6Language: englishTyp: PDF

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Kim, Jaehong; McLaughlin, Steven W. (School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA, USA)
Ramamoorthy, Aditya (Marvell Semiconductor Inc., Sunnyvale, CA, USA)

We present a new class of irregular low-density parity-check (LDPC) codes for finite block length (up to a few thousand symbols) that are well-suited for rate-compatible puncturing. The proposed codes are linear-time encodable with a simple shift-register implementation. In addition, the codes show excellent puncturing performance over a wide range of rates with systematic rate-compatible puncturing structure. For a blocklength of 1024 bits the codes outperform optimized irregular LDPC codes and extended irregular repeat-accumulate (eIRA) codes for all rates 0.5~0.9, and are particularly good at high puncturing rates where good puncturing performance has been previously difficult to achieve.