Method and apparatus for determining a received signal quality estimate of a trellis code modulated signal
US5737365A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1995 |
| Grant date | Apr 7, 1998 |
| Priority date | — |
| Expiry date | Oct 26, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/318
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
For each of one or more received trellises, a convolutional decoder (808) determines a path metric (812) and a signal strength estimator (809) determines a signal strength estimate (813). A signal quality estimator (810) processes the path metrics and signal strength estimates for each of the received trellises and produces a received signal quality estimate (814), the received signal quality estimate being indicative of a signal-to-interference-plus-noise ratio, a bit error rate, or a block error rate. This approach is well-suited for use with schemes having high-order symbol constellations. When incorporated into an RF transceiver 700, the received signal quality estimate can be used in the selection of an encoding scheme best adapted to ongoing RF channel conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.