Backward compatible DVB-S standard transmission system
US7315582B2 · kind B2 · utility
5Cited by
7References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 11, 2003 |
| Grant date | Jan 1, 2008 |
| Priority date | — |
| Expiry date | May 1, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/183
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to digital transmissions. It particularly relates to a new transmission system (DVB-S2), which is backward compatible with a primary transmission system (DVB-S), enabling a receiver of the primary system to receive signals transmitted by a transmitter of the new transmission system. The principle of the invention is based on using a hybrid QPSK/Non-Uniform 8-PSK modulation. The hybrid modulation is specified by a periodic binary pattern indicating, for each symbol, which modulation is used.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.