Method for iterative decoding in a digital system and apparatus implementing the method
US7770092B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2005 |
| Grant date | Aug 3, 2010 |
| Priority date | — |
| Expiry date | Jan 24, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/6511
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
In a digital system using a turbo code, a method for performing iterative decoding in accordance with a Log-MAP Algorithm comprises the steps of:—generating a look-up table comprising a plurality of values representative of a correcting factor;—performing a first calculation to obtain a forward metric;—performing a second calculation to obtain a backward metric;—performing a third calculation to obtain a log-likelihood ratio for every information bit to be decoded. In accordance with the method, at least one and no more than two of such calculations are performed by the use of said look-up table for implementing the Log-MAP decoding algorithm and the remaining calculations are performed implementing a Max-Log-MAP decoding algorithm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.