Viterbi trellis coding methods and apparatus for a direct access storage device
US5327440A · kind A · utility
47Cited by
11References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 15, 1991 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Oct 15, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M13/6502
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Viterbi trellis coding methods and Viterbi detector apparatus are provided for detecting trellis coded data. A systolic array Viterbi detector recursively calculates path metrics and partial sums of metric update equations to determine codeword sequences having minimum mean squared error for Viterbi-type maximum-likelihood data detection. The systolic array Viterbi detector is arranged to eliminate redundant calculations and simplify hardware requirements. Modified butterfly trellis geometries and rotating state metrics arrangements are provided for simplifying the Viterbi detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.