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 the baseband amplitude component of the communications signal;

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

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

a phase processing path for the baseband phase component of the communications signal.

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

an amplitude synchronizer in communication with the amplitude predictor and the amplitude lookup table, said amplitude synchronizer configured to

receive the closed-loop amplitude correction signal from the amplitude predictor during the closed-loop calibration period,

receive the open-loop amplitude correction signal from the amplitude lookup table during an open-loop operation period, and

generate a pre-distorted baseband amplitude signal.

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

an amplitude processing path for the baseband amplitude component of the communications signal;

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

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

4. The system as in claim 3 , further comprising:

a phase synchronizer in communication with the phase predictor and the phase lookup table, said phase synchronizer configured to

receive the closed-loop phase correction signal from the phase predictor during the closed-loop calibration period,

receive the open-loop phase correction signal from the phase lookup table during an open-loop operation period, and

generate a pre-distorted baseband phase signal.

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

6. 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 and comprising

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

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

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

a phase processing path for the baseband phase component of the communications signal.

7. The transmitter as in claim 6 , wherein said baseband processor further comprises:

an amplitude synchronizer in communication with the amplitude predictor and the amplitude lookup table, said amplitude synchronizer configured to

receive the closed-loop amplitude correction signal from the amplitude predictor during the closed-loop calibration period,

receive the open-loop amplitude correction signal from the amplitude lookup table during an open-loop operation period, and

generate a pre-distorted baseband amplitude signal.

8. The transmitter as in claim 6 , further comprising a power control module configured to control a power output of said power amplifier.

9. 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 and comprising

an amplitude processing path for the baseband phase component of the communications signal,

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

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

10. The transmitter as in claim 9 , wherein said baseband processor further comprises:

a phase synchronizer in communication with the phase predictor and the phase lookup table, said phase synchronizer configured to

receive the closed-loop phase correction signal from the phase predictor during the closed-loop calibration period,

receive the open-loop phase correction signal from the phase lookup table during an open-loop operation period, and

generate a pre-distorted baseband phase signal.

11. The transmitter as in claim 10 , wherein the pre-distorted baseband phase signal includes a pair of IQ signals.

12. The transmitter as in claim 9 , further comprising a power control module configured to control a power output of said power amplifier.