Synchronization techniques for polar transmitters

1. An apparatus, comprising:

a storage medium to store a plurality of adjustment settings, each adjustment setting corresponding to an operating condition of said apparatus and provided for reducing a polar modulation timing misalignment occurring within said apparatus; and

an electronic calibration circuit coupled to said storage medium and configured to

receive values for a plurality of different operational parameters which describe a current operating condition of said apparatus, said plurality of different operational parameters comprising an output power level parameter, an output signal frequency parameter and a temperature parameter,

select an adjustment setting from the plurality of adjustment settings which corresponds to a particular combination of values for said plurality of different operational parameters, and

reduce said polar modulation timing misalignment with the adjustment setting which was previously selected.

2. The apparatus of claim 1 , wherein the adjustment setting includes a phase path delay adjustment parameter and/or an amplitude path delay adjustment parameter.

3. The apparatus of claim 1 , further comprising:

a phase path;

an amplitude path; and

an amplifier to receive a first signal from the phase path and a second signal from the amplitude path; and

wherein the polar modulation timing misalignment corresponds to a difference in a delay of the phase path and a delay of the amplitude path.

4. The apparatus of claim 3 ,

wherein the adjustment setting includes a phase path delay adjustment parameter; and

wherein the phase path includes a variable delay element to adjust the delay of the phase path based on the phase path delay adjustment parameter.

5. The apparatus of claim 3 ,

wherein the adjustment setting includes an amplitude path delay adjustment parameter; and

wherein the amplitude path includes a variable delay element to adjust the delay of the phase path based on the amplitude path delay adjustment parameter.

6. The apparatus of claim 3 , further comprising a power control circuit to provide the amplifier with a current output power level setting, and to indicate the current output power level setting to the electronic calibration circuit.

7. The apparatus of claim 1 , further comprising a synchronization circuit to determine the plurality of adjustment settings.

8. The apparatus of claim 7 , wherein the synchronization circuit determines the plurality of adjustment settings based on output signals generated from training signals.

9. An apparatus, comprising:

a phase path to provide a phase signal;

an amplitude path to provide an amplitude signal;

an amplifier to produce a polar modulated signal from the phase signal and the amplitude signal;

a storage medium to store a plurality of adjustment settings, each adjustment setting corresponding to an operating condition of said apparatus and provided for reducing a polar modulation timing misalignment between the phase path and the amplitude path; and

a calibration circuit coupled to the storage medium and configured to

receive values for a plurality of different operational parameters which describe a current operating condition of said apparatus, said plurality of different operational parameters comprising an output power level parameter, an output signal frequency parameter and a temperature parameter,

select an adjustment setting from the plurality of adjustment settings which corresponds to a particular combination of values for said plurality of different operational parameters, and

reduce the polar modulation timing misalignment between the phase path and the amplitude path with the adjustment setting which was previously selected.

10. The apparatus of claim 9 , wherein the adjustment setting includes a phase path delay adjustment parameter and/or an amplitude path delay adjustment parameter.

11. The apparatus of claim 9 , wherein a current output power level setting of said apparatus is based on a power control command received from a remote device.

12. The apparatus of claim 11 , further comprising a power control circuit to provide the amplifier with the current output power level setting, and to indicate the current output power level setting to the calibration circuit.

13. A method, comprising:

storing in a storage medium a plurality of adjustment settings, each adjustment setting corresponding to an operating condition of an apparatus and provided for reducing a polar modulation timing misalignment occurring within said apparatus;

receiving, by an electronic circuit, values for a plurality of different operational parameters which describe a current operating condition of said apparatus, said plurality of different operational parameters comprising an output power level parameter, an output signal frequency parameter and a temperature parameter;

selecting, by the electronic circuit, an adjustment setting from the plurality of adjustment settings which corresponds to a particular combination of values for the plurality of different operational parameters; and

reducing, by the electronic circuit, said polar modulation timing misalignment with the adjustment setting which was previously selected.

14. The method of claim 13 , wherein the adjustment setting includes a phase path delay adjustment parameter and/or an amplitude path delay adjustment parameter.

15. The method of claim 13 , wherein the polar modulation timing misalignment is reduced by adjusting a delay of an amplitude path.

16. The method of claim 13 , wherein the polar modulation timing misalignment is reduced by adjusting a delay of a phase path.

17. The method of claim 13 , further comprising determining the plurality of adjustment settings based on output signals generated from training signals.