Calibration system, radio frequency system, and output power linearization method thereof

A calibration system comprising:

• a baseband control circuit configured to provide an instruction signal, wherein the instruction signal corresponds to a currently ideal output power among a plurality of ideal output powers;
• an emission module configured to output a radio frequency signal with a practical output power according to the instruction signal;
• a feedback circuit configured to obtaining a feedback signal from an output terminal of the emission module, wherein the baseband control circuit is configured to calculate a feedback output power from the feedback signal, and is configured to calculate an output difference between the currently ideal output power and the feedback output power;
• and
• a compensation value calculating circuit coupled to the baseband control circuit, wherein if the compensation value calculating circuit determines an absolute value of the output difference is larger than an absolute value of a feedback error of the feedback circuit, the baseband control circuit adjusts a present gain of the emission module so that the practical output power approaches the currently ideal output power.

A radio frequency system, comprising:

• a baseband control circuit configured to provide an instruction signal, wherein the instruction signal corresponds to a currently ideal output power among a plurality of ideal output powers;
• an emission module configured to output a radio frequency signal with a practical output power according to the instruction signal;
• a feedback circuit configured to obtain a feedback signal from an output terminal of the emission module, wherein the baseband control circuit is configured to calculate a feedback output power from the feedback signal, and is configured to calculate an output difference between the currently ideal output power and the feedback output power;
• wherein the baseband control circuit further configured to be coupled to a compensation value calculating circuit, and when the compensation value calculating circuit determines an absolute value of the output difference is larger than an absolute value of a feedback error of the feedback circuit, the baseband control circuit adjusts a present gain of the emission module so that the practical output power approaches the currently ideal output power.