Method for performing a frequency correction of a wireless device
US7974585B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2010 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Jun 18, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2027/0032
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of performing a frequency correction of a radio module. Multiple samples of frequency data during a quiescent portion of the base station transmission is taken to estimate the amount of frequency correction needed. An embodiment applies the frequency data to a median filter to eliminate invalid data. Next, a new reference frequency is applied to a radio transceiver in the radio module to provide the frequency correction. If the frequency was corrected by greater than a pre-determined amount, the process performs a large shift frequency correction, including verifying that the first frequency correction was satisfactory and verifying that the radio transceiver is able to receive data after the frequency correction has been performed. If the frequency was corrected by smaller than a pre-determined amount, the process performs a small shift frequency correction, including updating a total of all frequency corrections made since a stored reference frequency was updated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.