Transmitting and receiving apparatus and method including punctured convolutional encoding and decoding
US5438590A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1993 |
| Grant date | Aug 1, 1995 |
| Priority date | — |
| Expiry date | May 24, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/0806
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Digital data are communicated from a transmitter to a terrestrial receiver by encoding the data into first and second 1/2 rate convolutional encoded signals during different periods. During the different periods, the convolutional signals are encoded into first and second forward error correction convolutional encoded signals having 2/3 and 6/7 punctured codes transmitted to the receiver via a satellite. Power emitted from the satellite during the first period is 3 db lower than that emitted during the second period. An antenna dish having a diameter no greater than about 1 meter is at the receiver responsive to both signals emitted from the satellite. The encoded signals include sequential bits P.sub.1 (0), P.sub.1 (1), etc. and P.sub.2 (0), P.sub.2 (1), etc. At the 2/3 rate, parallel punctured bit streams respectively including sequential bits P.sub.1 (0), P.sub.2 (1), P.sub.2 (2), P.sub.1 (4) and P.sub.2 (0), P.sub.1 (2), P.sub.2 (3), P.sub.2 (4) are derived. At the 6/7 rate, the punctured bit streams are respectively P.sub.1 (0), P.sub.2 (1), P.sub.1 (3), P.sub.1 (5), P.sub.2 (6), P.sub.2 (8), P.sub.2 (10) and P.sub.2 (0), P.sub.2 (2), P.sub.2 (4), P.sub.1 (6), P.sub.2 (7), P.s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.