VCO ringing correction in packet switched wireless networks

A wireless communications apparatus, comprising:

• a frequency offset estimator circuit configured to:
• generate a first frequency offset estimate from a training portion of a received signal where ringing effects from a voltage-controlled oscillator of a transmitter sending the received signal are present,
• generate a second frequency offset estimate from a signaling portion of the received signal where the ringing effects have settled, and
• determine a difference between the first frequency offset estimate and the second frequency offset estimate;
• and
• a phase error evaluator circuit configured to estimate a phase error of a symbol of the received signal located after the training portion and the signal portion of the received signal based upon the difference between the first frequency offset estimate and the second frequency offset estimate, wherein the phase error is introduced through utilization of the first frequency offset estimate, which is erroneous due to the ringing effects, to correct later symbols of the received signal.

A wireless communications apparatus that facilitates mitigating ringing effects, comprising:

• means for receiving a signal from a transmitter;
• means for generating a first frequency offset estimate from a first portion of the signal where ringing effects from a voltage-controlled oscillator are present;
• means for generating a second frequency offset estimate from a second portion of the signal that is subsequent to the first portion, wherein the second portion of the signal corresponds to where ringing effects have settled;
• means for extrapolating a phase error for a third portion of the signal based at least upon a difference between of the first frequency offset estimate and the second frequency offset estimate;
• and
• means for correcting the phase error for the third portion of the signal.

A non-transitory computer-readable storage medium comprising computer-executable instructions that, in response to execution by a computing system, cause the computing system to perform operations comprising:

• generating a first frequency offset estimate from a first portion of a signal transmitted by a transmitter, wherein the first portion of the signal corresponds to a part of the signal where ringing effects are present from a voltage-controller oscillator of the transmitter;
• generating a second frequency offset estimate from a second portion the signal, wherein the second portion of the signal corresponds to another part of the signal where the ringing effects from the voltage-controller oscillator have settled;
• and
• extrapolating a phase error for a third portion of the signal, not yet processed, based at least upon a difference between the first frequency offset estimate and the second frequency offset estimate.