Recursive decoder for switching between normalized and non-normalized probability estimates
US7120851B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2003 |
| Grant date | Oct 10, 2006 |
| Priority date | — |
| Expiry date | Nov 7, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/2978
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present invention relates generally to error-correction coding and, more particularly, to a decoder for concatenated codes, e.g., turbo codes. The present invention provides a decoder for decoding encoded data, the decoder comprising: a processor having an input which receives probability estimates for a block of symbols, and which is arranged to calculates probability estimates for said symbols in a next iterative state; normalising means which normalises said next states estimates; a switch that receives both said normalised and said unnormalised next state estimates, the output of the switch being coupled to the input of the processor; wherein the switch is arranged to switch between the normalised and unnormalised next state estimates depending on the iterative state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.