Frequency error estimation using multiple integration lengths

A method to configure an oscillator for use in connection with a wireless communication device, the method comprising:

• reading a frequency offset value from a memory associated with the oscillator;
• averaging a first set of frequency error estimates to determine a short-term average value;
• averaging a second set of frequency error estimates to determine a long-term average value, the second set comprising a superset of the first set of frequency error estimates;
• adjusting an oscillator frequency as a function of the short-term average value when the short-term average value exceeds a short-term threshold value;
• and
• adjusting the oscillator frequency as a function of the long-term average value when the long-term average value exceeds a long-term threshold value lower than the short-term threshold value.

An integrated circuit (IC) comprising:

• an oscillator;
• and
• a processor arrangement operatively coupled to the oscillator and configured to
• average a first set of frequency error estimates to determine a short-term average value,
• average a second set of frequency error estimates to determine a long-term average value, the second set comprising a superset of the first set of frequency error estimates,
• adjust a frequency of the oscillator as a function of the short-term average value when the short-term average value exceeds a short-term threshold value, and
• adjust a frequency of the oscillator as a function of the long-term average value when the long-term average value exceeds a long-term threshold value lower than the short-term threshold value.

A wireless communication device (WCD) comprising:

• an antenna arranged to receive an RF signal;
• a receive arrangement, operatively coupled to the antenna, to generate a plurality of samples as a function of the RF signal;
• an oscillator, operatively coupled to the receive arrangement and configured to generate a frequency;
• and
• a processor arrangement, coupled to receive the plurality of samples from the receive arrangement and configured to
• calculate a plurality of frequency error estimates as a function of the samples;
• average a first subset of the frequency error estimates to determine a short-term average value,
• average a second subset of the frequency error estimates to determine a long-term average value, the second subset comprising a superset of the first subset of frequency error estimates,
• adjust the frequency generated by the oscillator as a function of the short-term average value when the short-term average value exceeds a short-term threshold value, and
• adjust the frequency generated by the oscillator as a function of the long-term average value when the long-term average value exceeds a long-term threshold value lower than the short-term threshold value.

A processor arrangement comprising:

• means for averaging a first set of frequency error estimates to determine a short-term average value;
• means for averaging a second set of frequency error estimates to determine a long-term average value, the second set comprising a superset of the first set of frequency error estimates;
• means for adjusting a frequency of the oscillator as a function of the short-term average value when the short-term average value exceeds a short-term threshold value;
• and
• means for adjusting a frequency of the oscillator as a function of the long-term average value when the long-term average value exceeds a long-term threshold value lower than the short-term threshold value.

A processor-readable medium containing processor-executable instructions for:

• averaging a first set of frequency error estimates to determine a short-term average value;
• averaging a second set of frequency error estimates to determine a long-term average value, the second set comprising a superset of the first set of frequency error estimates;
• determining a frequency offset as a function of the short-term average value when the short-term average value exceeds a short-term threshold value;
• and
• determining a frequency offset as a function of the long-term average value when the long-term average value exceeds a long-term threshold value lower than the short-term threshold value.

A processor-readable medium containing processor-executable instructions for:

• reading a frequency offset value from a memory associated with an oscillator;
• averaging a first set of frequency error estimates to determine a short-term average value;
• averaging a second set of frequency error estimates to determine a long-term average value, the second set comprising a superset of the first set of frequency error estimates;
• adjusting an oscillator frequency as a function of the short-term average value when the short-term average value exceeds a short-term threshold value;
• and
• adjusting the oscillator frequency as a function of the long-term average value when the long-term average value exceeds a long-term threshold value lower than the short-term threshold value.