Methods and systems for estimating frequency synchronization accuracy
US9673970B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 25, 2016 |
| Grant date | Jun 6, 2017 |
| Priority date | — |
| Expiry date | Feb 25, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W74/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
This invention relates to methods and systems for estimating and checking synchronization accuracy, in particular frequency synchronization accuracy. It is particularly applicable to synchronization methods and systems which involve a digital phase-locked loop (DPLL) and embodiments provide methods and systems for estimating and tracking how well the DPLL is frequency synchronized to a source frequency. In one embodiment, frequency synchronization accuracy is used as an additional quality metric for mobile call handover between base stations. Call handover is of major importance within any mobile network; without checking frequency synchronization before handover dropped calls and interrupted communication can result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.