Post-processing decoder of LDPC codes for improved error floors
US8219878B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2008 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Apr 19, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/1142
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Systems and methods are provided for decoding received codewords using an LDPC code. An LDPC post-processor is disclosed for performing post-processing when standard LDPC decoding fails due to a trapping set. The LDPC post-processor may direct the LDPC decoder to decode the received codeword again, but may change some of the inputs to the LDPC decoder so that the LDPC decoder does not fail in the same way. In one embodiment, the LDPC post-processor may modify the symbol positions in the received codeword that correspond to a particular unsatisfied check. In another embodiment, the LDPC post-processor may modify the messages in the decoder's iterative message algorithm that correspond to the symbol positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.