Adaptive coding scheme for a processing communications satellite
US6625776B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 1998 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Sep 30, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0025
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention provides a comprehensive method for controlling, independently, transmit power and coding levels for data transmitted in uplinks and downlinks. One preferred embodiment of the present invention provides a method for adaptive coding of data in a downlink. A data error rate associated with downlink data (e.g., a character error rate provided by a Reed Solomon decoder) is determined. The method, based upon pre-established error rate thresholds, controls the level of coding (e.g., heavy or light) on data in the downlink to achieve a desired data error rate. Heavy coded data is typically associated with a code rate half that of light coded data, and changes between heavy and light coding may be selected using a destination address applied at an originating terminal and interpreted at the satellite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.