Rate-compatible protograph LDPC codes
US8689083B2 · kind B2 · utility
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8References
27Claims
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Key dates
| Filing date | Jun 10, 2011 |
| Grant date | Apr 1, 2014 |
| Priority date | — |
| Expiry date | Apr 9, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/1812
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Digital communication coding methods resulting in rate-compatible low density parity-check (LDPC) codes built from protographs. Described digital coding methods start with a desired code rate and a selection of the numbers of variable nodes and check nodes to be used in the protograph. Constraints are set to satisfy a linear minimum distance growth property for the protograph. All possible edges in the graph are searched for the minimum iterative decoding threshold and the protograph with the lowest iterative decoding threshold is selected. Protographs designed in this manner are used in decode and forward relay channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.