- Title
- Combinatorial interleavers for systematic regular repeat-accumulate codes
- Creator
- Johnson, Sarah J.; Weller, Steven R.
- Relation
- IEEE Transactions on Communications Vol. 56, Issue 8, p. 1201-1206
- Publisher Link
- http://dx.doi.org/10.1109/TCOMM.2008.041247
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Resource Type
- journal article
- Date
- 2008
- Description
- This paper proposes novel interleaver and accumulator structures for systematic, regular repeat-accumulate (RA) codes. It is well known that such codes are amenable to iterative (sum-product) decoding on the Tanner graph of the code, yet are as readily encodable as turbo codes. In this paper, interleavers for RA codes are designed using combinatorial techniques as a basis for deterministic interleaver constructions, yielding RA codes whose Tanner graphs are free of 4-cycles. Further, a generalized RA code accumulator structure is proposed, leading to codes, termed w3RA codes, whose parity-check matrices have many fewer weight-2 columns than conventional RA codes. The w3RA codes retain the low-complexity encoding of conventional RA codes and exhibit improved error-floor performance.
- Subject
- repeat-accumulate (RA) codes; iterative decoding; sum-product algorithm; interleaver design; low-density parity-check (LDPC) codes
- Identifier
- http://hdl.handle.net/1959.13/30772
- Identifier
- uon:2706
- Identifier
- ISSN:0090-6778
- Rights
- Copyright © 2008 IEEE. Reprinted from IEEE Transactions on Communications, Vol. 56, Issue 8, p. 1201-1206. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Newcastle's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
- Language
- eng
- Full Text
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