System and method for synchronization, power control, calibration, and modulation in communication transmitters

1. A system for processing a communication signal including a baseband amplitude component and a baseband phase component, comprising:

an amplitude predictor configured to provide a closed-loop amplitude correction signal for closed-loop pre-distortion of a baseband amplitude component;

an amplitude lookup table configured to provide an open-loop amplitude correction signal for open-loop pre-distortion of the baseband amplitude component;

an amplitude interpolator configured to build up the amplitude lookup table with a plurality of amplitude correction values during a closed-loop calibration period;

a phase predictor configured to provide a closed-loop phase correction signal for closed-loop pre-distortion of a baseband phase component;

a phase lookup table configured to provide an open-loop phase correction signal for open-loop pre-distortion of the baseband phase component; and

a phase interpolator configured to build up the phase lookup table with a plurality of phase correction values during a closed-loop calibration period.

2. A system as in claim 1 , further comprising:

an amplitude synchronizer in communication with the amplitude predictor and the amplitude lookup table;

wherein the amplitude synchronizer is configured to receive the closed-loop amplitude correction signal from the amplitude predictor during the closed-loop calibration period; and

wherein the amplitude synchronizer is further configured to receive the open-loop amplitude correction signal from the amplitude lookup table during an open-loop operation period; and

wherein the amplitude synchronizer is further configured to generate a pre-distorted baseband amplitude signal.

3. A system as in claim 1 , further comprising:

a phase synchronizer in communication with the phase predictor and the phase lookup table;

wherein the phase synchronizer is configured to receive the closed-loop phase correction signal from the phase predictor during the closed-loop calibration period;

wherein the phase synchronizer is further configured to receive the open-loop phase correction signal from the phase lookup table during an open-loop operation period; and

wherein the phase synchronizer is further configured to generate a pre-distorted baseband phase signal.

4. A system as in claim 3 , wherein the pre-distorted baseband phase signal includes a pair of IQ signals.

5. A transmitter for transmitting a communication signal based on a baseband signal including a baseband amplitude component and a baseband phase component, comprising:

a power amplifier; and

a baseband processor in communication with the power amplifier, wherein the baseband processor includes:

an amplitude predictor configured to provide a closed-loop amplitude correction signal for closed-loop pre-distortion of a baseband amplitude component;

an amplitude lookup table configured to provide an open-loop amplitude correction signal for open-loop pre-distortion of the baseband amplitude component;

an amplitude interpolator configured to build up the amplitude lookup table with a plurality of amplitude correction values during a closed-loop calibration period;

a phase predictor configured to provide a closed-loop phase correction signal for closed-loop pre-distortion of a baseband phase component;

a phase lookup table configured to provide an open-loop phase correction signal for open-loop pre-distortion of the baseband phase component; and

a phase interpolator configured to build up the phase lookup table with a plurality of phase correction values during a closed-loop calibration period.

6. A transmitter as in claim 5 , further comprising:

a power control module configured to control a power output of the power amplifier.