Diode-configured Viterbi algorithm error correcting decoder for convolutional codes
US4545054A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 9, 1983 |
| Grant date | Oct 1, 1985 |
| Priority date | — |
| Expiry date | Sep 9, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/41
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Viterbi algorithm error correcting decoder is configured of a trellis of branch-distance circuits each of which is formed of sets of diode and controlled interconnecting switches. During a respective bit time of the signal to be decoded, the branch-distance circuits are controlled so as to connect a number of diodes in each branch of the trellis proportional to the distance of the diode branch of interest to the received code branch. Due to the nonlinear voltage-current characteristic of a diode, only the path through the trellis of the branch-distance circuits having the minimum distance from the received data will draw current. Detection of this current-carrying path is used to implement the Viterbi algorithm decoder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.