Hierarchical trellis coded modulation
US7613985B2 · kind B2 · utility
5Cited by
53References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 22, 2004 |
| Grant date | Nov 3, 2009 |
| Priority date | — |
| Expiry date | Dec 10, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/3416
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method for encoding information is disclosed. In one embodiment, information is encoded using a high protection code for the least significant bit and a low protection code for the next three most significant bits. The remaining bits are uncoded. The high protection code may be a turbo code and the low protection code may be a trellis coded modulation code. In this embodiment, the collection of bits is then mapped according to a diagonally shifted QAM constellation technique.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.