High rate trellis code for partial response channels
US6233289A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1997 |
| Grant date | May 15, 2001 |
| Priority date | — |
| Expiry date | Jul 16, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/1434
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Signals indicative of unencoded input data are encoded into a plurality of encoded sequences. A first subset of the plurality of encoded sequences are encoded according to a k constrained code of rate x/y and a second subset of the plurality of unencoded sequences are encoded according to a k constrained code of rate m/n wherein x/y.noteq.m/n. The encoded sequences are transmitted to a partial response channel subject to noise. The encoded sequences are transmitted from the channel to a Viterbi detector having a trellis structure with a preselected, time-dependent pattern to create a time varying trellis structure for limiting a maximum length of parallel paths therethrough. The encoded sequences are detected with a Viterbi detector to provide detected, encoded sequences. The detected, encoded sequences are then decoded to provide an estimate of the input data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.