Patent ID: 8909179

Claim:
A method for controlling a transmit signal of a radio frequency power amplifier, comprising: adjusting, an efficiency point power supply voltage of a DC/DC voltage converter to a power amplifier under a designated transmit power for the power amplifier; querying recorded correspondence between an input voltage for the power amplifier, transmit power of the power amplifier at power levels of the power amplifier and the adjusted efficiency point power supply voltage of the DC/DC voltage converter; and adjusting the input voltage for the power amplifier to correspond to the designated transmit power for the power amplifier, according to the queried correspondence between the input voltage for the power amplifier and the transmit power of the power amplifier under the adjusted efficiency point power supply voltage of the DC/DC voltage converter, wherein the adjusting the input voltage for the power amplifier comprises: obtaining the queried power level and the input voltage for the power amplifier corresponding to the transmit power of the power amplifier; and adjusting, for the power amplifier, a gain mode to reach the queried power level and the input voltage, so as to make the transmit power of the power amplifier meet a requirement of the transmit signal of the power amplifier.