Trellis precoding for fractional bits/baud
US5214672A · kind A · utility
40Cited by
5References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1990 |
| Grant date | May 25, 1993 |
| Priority date | — |
| Expiry date | Apr 6, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03808
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A digital data sequence is mapped into a signal point sequence e(D) for data transmission over a channel h(D) to produce a channel output sequence y(D)=e(D)h(D). e(D) is chosen so that the signal points in the sequence y(D) belong to a class of possible sequences based on the digital data sequence, the class being based on a time-varying trellis code derived from an N-dimensional time-invariant trellis code by using different transformed versions of its underlying lattices for respectively different N-dimensional symbols.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.