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

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.

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.

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.

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.