Frequency synchronization methods and apparatus
US8447005B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2009 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Mar 13, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J13/0062
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Methods and apparatus for have frequency offset estimation and cell search in radio communication systems take into account the time-frequency correlation properties of reference and synchronization signals in such systems. This reduces the probability of misdetection of the physical layer cell ID and frequency offset by accounting for time-frequency ambiguities and evaluating correlation signal peaks in the frequency domain, saving signal processing time and making initial cell search considerably faster. Also, lower-grade and hence cheaper oscillators can be used without causing problems in the user's experience with a receiver, such as a cellular telephone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.