Power adjustment method, computer-readable recording medium and power adjustment apparatus

A non-transitory computer-readable recording medium having stored therein a power adjustment program that causes a computer to execute a process comprising:

• acquiring first output power that is obtained when first input power to be amplified in a linear region is input to a power amplifier configured to amplify input power linearly in the linear region in which output power is less than a predetermined value and amplify the input power nonlinearly in a nonlinear region in which the output power is equal to or more than the predetermined value;
• deriving a straight line connecting a measurement point representing the first input power and the first output power and a boundary point that is stored in advance and represents the input power and the output power at a boundary between the linear region and the nonlinear region, in a coordinate plane having an axis of the input power and an axis of the output power;
• acquiring a coefficient of an equation that is stored in advance in correspondence with the first output power, the equation representing a relation between the input power and the output power in the nonlinear region;
• and
• storing information on the derived straight line and the acquired coefficient of the equation in a semiconductor integrated circuit provided at a preceding stage of the power amplifier.

A power adjustment apparatus comprising:

• a memory that stores therein, about a power amplifier configured to amplify input power linearly in a linear region in which output power is less than a predetermined value and amplify the input power nonlinearly in a nonlinear region in which the output power is equal to or more than the predetermined value, a boundary point representing the input power and the output power at a boundary between the linear region and the nonlinear region and a coefficient of an equation representing a relation between the input power and the output power in the nonlinear region;
• and
• a processor connected to the memory, wherein
• the processor executes a process comprising:
• acquiring first output power that is obtained when first input power to be amplified in the linear region is input to a power amplifier to be adjusted;
• deriving a straight line connecting a measurement point representing the first input power and the first output power and the boundary point in a coordinate plane having an axis of the input power and an axis of the output power;
• acquiring the coefficient of the equation that is stored in the memory in correspondence with the first output power;
• and
• storing information on the derived straight line and the acquired coefficient of the equation in a semiconductor integrated circuit provided at a preceding stage of the power amplifier to be adjusted.