Trellis modulation protocols for a VDSL system
US8644405B2 · kind B2 · utility
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4References
26Claims
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Key dates
| Filing date | Jul 16, 2012 |
| Grant date | Feb 4, 2014 |
| Priority date | — |
| Expiry date | Jul 16, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/26522
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A new protocol is proposed for transmission of data through lines such as telephone lines. The tones of a signal are grouped, and Trellis encoding is performed only of the members of a group. The computational cost of coding and decoding the data is reduced (compared to treating all the tones of a given direction equivalently), and the invention makes it possible to significantly reduce the computational and memory requirements of the encoder and decoder. Furthermore, Trellis decoding errors are not propagated between the groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.