Signal quality estimator
US8144814B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 2007 |
| Grant date | Mar 27, 2012 |
| Priority date | — |
| Expiry date | Jan 26, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/067
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques for estimating signal quality in a communication system are described. Scaled errors are obtained for inphase (I) and quadrature (Q) components of detected symbols. The scaled errors are determined based on a first function having higher resolution for small errors than large errors between the detected symbols and nearest modulation symbols. The first function may be a square root function or some other function that can provide good resolution for both low and high SNRs. The scaled errors for the I and Q components are combined to obtain combined scaled errors, which are averaged to obtain an average scaled error. A signal quality estimate is then determined based on the average scaled error and in accordance with a second function having non-linearity to compensate for the first function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.