Selective signal demodulation method and apparatus
US8000413B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 20, 2007 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Jun 15, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0002
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Signal quality estimation and demodulation are tailored to the received signal quality. According to one embodiment, a received signal is processed by determining a first set of combining weights based on a first impairment covariance estimate derived assuming a low signal quality environment. A second set of combining weights is determined based on a second impairment covariance estimate derived assuming a high signal quality environment. A metric is determined corresponding to the difference between symbol estimates derived from the second set of combining weights and hard symbol decisions. The received signal is demodulated based on the second set of combining weights if the metric satisfies a threshold indicating high signal quality and otherwise based on the first set of combining weights.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.