A New Parity Structure With Multi-Weight Circulants for QC LDPC Codes
- Title
- A New Parity Structure With Multi-Weight Circulants for QC LDPC Codes
- Author
- 신동준
- Keywords
- Parity check codes; Data structures; Boolean functions; Encoding; Hamming distance; Bit error rate; Indexes
- Issue Date
- 2012-07
- Publisher
- unknown
- Citation
- IEEE International Symposium on Information Theory, 2012, 4, P.3093-3097
- Abstract
- The block dual-diagonal (BDD) parity structure is widely adopted in many practical irregular quasi-cyclic (QC) low-density parity-check (LDPC) codes. These QC LDPC codes have good error-correcting performance in waterfall region but usually show relatively high error floors in low error rate region. In this paper, by using multi-weight circulants, a new BDD structure is proposed for the parity part of irregular QC LDPC codes to lower error floors and support efficient encoding. Since the parity part of parity-check matrices has flexible degree distribution with the aid of multi-weight circulants, QC LDPC codes with the proposed BDD structure can have large minimum Hamming distance compared to those with the conventional BDD structure, especially, in the low-rate case. Simulation results show that QC LDPC codes with the proposed BDD structure have lower error floor than those with the conventional BDD structure.
- URI
- https://ieeexplore.ieee.org/document/6284131/http://hdl.handle.net/20.500.11754/66384
- ISSN
- 0271-4655
- DOI
- 10.1109/ISIT.2012.6284131
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML