Method and apparatus for varying lengths of low density party check codewords
US7263651B2 · kind B2 · utility
52Cited by
16References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2004 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | Jul 5, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/12
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for encoding/decoding information using low density parity check (LDPC) codewords of varying lengths. In one implementation, an encoder/decoder uses a parity check matrix having a size that corresponds to a length of information for each codeword. In one example, the size of the parity check matrix may be retrieved from multiple stored matrices having different sizes. In other examples, a mother code matrix may be dynamically adjusted by puncturing parity bits and/or deleting information bits. Other inventive embodiments and adaptations are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.