Processing of state histories in Viterbi decoding
US6460161B1 · kind B1 · utility
2Cited by
15References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 1, 1999 |
| Grant date | Oct 1, 2002 |
| Priority date | — |
| Expiry date | Jun 1, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/2957
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A simplified method of history handling for the Viterbi decoding of convolutional codes is described herein. The state number, or one or more of the most-significant bits of the state number, is loaded into the corresponding state history. Each state number represents the sequence of data bits that, in convolutional encoding, would give rise to the corresponding state. The most recent data bit provides the least significant bit of the state number. This invention reduces the processing requirements associated with the handling of the history, and is especially useful for decoder implementations using general-purpose processors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.