Method and apparatus for decoding data in a layered modulation system
US8223853B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2006 |
| Grant date | Jul 17, 2012 |
| Priority date | — |
| Expiry date | Oct 26, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2001/0098
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A decoder for a layered modulation system can be configured to independently and concurrently decode each of a base and enhancement layer. The base layer decoder and enhancement layer decoder can be configured substantially in parallel and can each operate concurrently on the same received layered modulation symbol. Each of the base and enhancement layer decoders can be configured with a bit metric module that is configured to determine a signal quality metric based on the received symbol. In systems having turbo encoded data, the bit metric module can be configured to determine a log likelihood ratio. The ratio is based in part on a channel estimate and an energy ratio used in the layered modulation constellation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.