Unified stopping criteria for binary and duobinary turbo decoding in a software-defined radio system
US7802170B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2006 |
| Grant date | Sep 21, 2010 |
| Priority date | — |
| Expiry date | Jul 21, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/395
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A decoding process for decoding a received block of N systematic binary data samples or N systematic duobinary data samples using a maximum a posteriori probability (MAP) decoding algorithm. The decoding process calculates a set of four log-likelihood values using the corresponding forward state metric, reverse state metric, and branch metric values for each of N/2 pairs of systematic binary data or each of N/2 pairs of duobinary data in the received block. The decoding process also calculates, for each set of four log-likelihood values a delta value corresponding to the difference between the largest and the second largest of the four log-likelihood values in each set. The decoding process repeats for at least a second iteration. The decoding process is stopped based on a plurality of delta values calculated during two consecutive iterations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.