Viterbi algorithm decoding method and apparatus
US5504784A · kind A · utility
Inventors
Key dates
| Filing date | Oct 6, 1993 |
| Grant date | Apr 2, 1996 |
| Priority date | — |
| Expiry date | Oct 6, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0054
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of decoding (311 and 417) by Viterbi algorithm is applied with a metric that limits effects on the metric's value. A received signal (109) comprised of symbols is filtered, thereby providing (303 and 403) a phase angle of the received signal (109) and providing (305 and 409) a magnitude of the received signal (109). The phase angle of the received signal (109) and the magnitude of the received signal (109) are sampled (309 and 413) once per symbol and then decoded according to the Viterbi algorithm with a metric that limits effects on the metric's value as the difference between the sampled phase angle and the decoded symbol increases.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.