Patent ID: 7720469

Claim:
A wireless telecommunication device comprising: a receiver configured to receive a reference radio signal of a wireless telecommunications system; a reference frequency generator configured to generate a reference frequency for the wireless telecommunication device on the basis of a control parameter wherein the reference frequency generator is configured to generate a first frequency and a second frequency simultaneously, the first frequency having a first response to temperature of the reference frequency generator and the second frequency having a second response to temperature of the reference frequency generator, the second response being different from the first response; a frequency synchronizer, connected to the receiver, configured to determine the control parameter in a calibration procedure by frequency synchronizing the wireless telecommunication device with the reference radio signal; a temperature measurement unit configured to generate a temperature parameter characterizing the temperature of the reference frequency generator by using the first frequency and the second frequency; and a calibration unit, connected to the temperature measurement unit, configured to generate calibration information comprising the control parameter determined by the frequency synchronizer and the temperature parameter associated with the control parameter and to store the calibration information in the calibration procedure, wherein the calibration unit is further configured to apply a control parameter associated with a current temperature parameter to the reference frequency generator after the calibration procedure.