Trellis-based detection process and system
US7430704B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 20, 2004 |
| Grant date | Sep 30, 2008 |
| Priority date | — |
| Expiry date | Mar 16, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B20/10009
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for detecting signals affected by intersymbol interference provides for a path memory in the form of a trellis admitting survivor paths comprising a first and a second stage. The first stage includes a shift register exchange with a given number of states and a given length λ. The first stage outputs a first state SAkk-λ on the survivor path for the best state Ak, and a second state SBkk-λ on the survivor path for another state Bk. The second stage is configured as a two-state shift register exchange having a respective memory length Λ, including respective first and second registers. In the respective first and second registers the survivor paths are stored leading to a respective first σ0k and second σ1k state, whereby the respective first register contains the backend of the best survivor path, while the respective second register contains the backend of an alternative survivor path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.