Method and apparatus for Viterbi synchronization
US7161995B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 2002 |
| Grant date | Jan 9, 2007 |
| Priority date | — |
| Expiry date | Apr 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0054
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Method and apparatus are described for determining when a convolution decoder is out of synchronization. Normalizations from a convolutional decoder are counted to provide a normalization count, and errors from the convolutional decoder are counted to provide an error count. One of the normalization count and the error count is compared to a first threshold associated with the selected one of the normalization count and the error count. The other of the normalization count and the error count is compared to a second threshold in response to meeting the first threshold, such as bit errors per X normalizations or normalizations per Y bit errors. From this latter comparison, an indicator is generated as to whether the convolutional decoder is synchronized or not.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.