Method and apparatus for controlling transmit signal of radio frequency power amplifier
View Patent ↗A method and an apparatus for controlling a transmit signal of a radio frequency power amplifier are provided. The method includes: adjusting a power supply voltage of the power amplifier to an efficiency point power supply voltage under designated transmit power; querying correspondence between an input voltage and transmit power at each power level under the efficiency point power supply voltage; and adjusting, according to the correspondence, an input voltage to an input voltage corresponding to the designated transmit power. The embodiments of the present invention, the power amplifier is enabled to work at an optimum efficiency point while the transmit power of the power amplifier is under control, which improves efficiency of the power amplifier.
1. 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.
2. The method according to claim 1 , wherein before the adjusting the efficiency point power supply voltage of the DC/DC voltage converter to the power amplifier under the designated transmit power, the method further comprises:
obtaining an adjusting range of the power supply voltage of the DC/DC voltage converter of the power amplifier; and
detecting correspondence between an input voltage for the amplifier and a transmit power of the power amplifier at power levels of the power amplifier under different power supply voltages of the DC/DC voltage converter within the adjusting range.
3. An apparatus for controlling a transmit signal of a radio frequency power amplifier, comprising:
computer hardware that implements:
an adjusting module, configured to adjust an efficiency point power supply voltage of a DC/DC voltage converter to the power amplifier under a designated transmit power for the power amplifier;
a querying module, configured to query 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 to power consumption efficiency point power supply voltage of the DC/DC voltage converter; and
a control module, configured to adjust 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;
the control module further comprises:
an obtaining unit, configured to obtain the queried power level and the input voltage for the power amplifier corresponding to the transmit power of the power amplifier; and
a control unit, configured to adjust, 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.
4. The apparatus according to claim 3 , further comprising:
a range obtaining module, configured to obtain an adjusting range of the power supply voltage of the DC/DC voltage converter of the power amplifier; and
a relationship detecting module, configured to detect correspondence between an input voltage for the amplifier and a transmit power of the power amplifier at power levels of the amplifier under different power supply voltages of the DC/DC voltage converter within the adjusting range.
5. An apparatus for controlling a transmit signal of a radio frequency power amplifier, comprising:
adjusting, by a processor, 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, by the processor, 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, by the processor, 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 processor is configured to obtain the queried power level and the input voltage for the power amplifier corresponding to the transmit power of the power amplifier, and to adjust, 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.
6. The apparatus according to claim 5 , wherein the processor is configured to obtain an adjusting range of the power supply voltage of the DC/DC voltage converter of the power amplifier; and to detect correspondence between an input voltage for the amplifier and a transmit power of the power amplifier at power levels of the amplifier under different power supply voltages of the DC/DC voltage converter within the adjusting range.