High order modulation protograph codes
US8832520B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Nov 29, 2011 |
| Grant date | Sep 9, 2014 |
| Priority date | — |
| Expiry date | Apr 1, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0057
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Digital communication coding methods for designing protograph-based bit-interleaved code modulation that is general and applies to any modulation. The general coding framework can support not only multiple rates but also adaptive modulation. The method is a two stage lifting approach. In the first stage, an original protograph is lifted to a slightly larger intermediate protograph. The intermediate protograph is then lifted via a circulant matrix to the expected codeword length to form a protograph-based low-density parity-check code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.