Method for detecting a discrete symbol sequence from an observation signal, and viterbi processor implementing such method
US6389574B1 · kind B1 · utility
27Cited by
12References
26Claims
0Family size
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Key dates
| Filing date | Mar 24, 1999 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Mar 24, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03375
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The detection of symbols of a sequence on the basis of an observation signal is performed in accordance with a soft output Viterbi algorithm using a trellis. In order to assign a likelihood to a discrete estimation of a symbol, the difference between the metrics of the optimal path determined in accordance with the Viterbi algorithm and the metrics of a competitor path, which is optimal among all the paths leading to a different decision for the symbol in question is calculated, the metrics being considered on the whole length of the trellis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.