Determining the received data rate in a variable rate communications system
US6370672B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 1999 |
| Grant date | Apr 9, 2002 |
| Priority date | — |
| Expiry date | Nov 1, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0046
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention comprises methods and apparatus for determining the rate at which data was encoded when such data is received at a receiver. According to the present invention, the rate is determined by computing, for a plurality of possible rates, a final test statistic based on a plurality of measures. The final test statistics are compared and based upon certain selection criteria (for example, without limiting the foregoing, which final test statistic corresponds the highest value), the rate is selected. In the preferred embodiment, the measures comprise statistics based on the cyclical redundancy check, Viterbi metrics, re-encoded symbol error rate, and distance to next largest Viterbi metric.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.