Decoding method and apparatus
US6542559B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2000 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | May 15, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/2972
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A decoding method and apparatus include providing capability for decoding data symbols that were encoded in a transmitter by either a serial-concatenated code or turbo code in a parallel processing fashion. The receiver upon knowing the encoding method may reconfigure the selection of data symbols from a table (600) to accommodate the appropriate decoding process. Initially a data symbol estimate for a number of data symbols of a plurality of data symbols Xi, Yi, and Wi are determined. The estimates of data symbols Xi, Yi, and Wi passing to a first and second decision nodes (610, 620) include estimates for the variables in one or more encoding equations. A new estimate for the data symbol Xi is determined based on the estimate determined at the initial step and the new estimate for each occurrence of the data symbol Xi at the first and second decision nodes (610, 620). After normalizing estimates of data symbols Xi, Yi, and Wi, a new estimate for data symbol Xi may be determined which holds more confidently a true value for the data symbol Xi than a previously determined estimate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.