Method and apparatus for determining nonlinear characteristic and system

A method for determining a nonlinear characteristic, comprising:

• determining a correction factor of a nonlinear item of a nonlinear model of a system to be measured with adjustable parameters according to an input and/or a parameter of the system to be measured;
• correcting the nonlinear item of the nonlinear model of the system to be measured by using the correction factor;
• and
• obtaining a nonlinear characteristic of the system to be measured according to the corrected nonlinear model;
• wherein the determining a correction factor of a nonlinear item of a system to be measured comprises:
• determining signal power according to the input and/or the parameter of the system to be measured;
• and
• determining the correction factor according to the signal power by using an empirical formula of a signal power correction factor regarding signal power.

A non-transitory computer readable medium storing a method for determining a nonlinear characteristic, the method comprising:

• determining a correction factor of a nonlinear item of a nonlinear model of a system to be measured with adjustable parameters according to an input and/or a parameter of the system to be measured;
• correcting the nonlinear item of the nonlinear model of the system to be measured by using the correction factor;
• obtaining a nonlinear characteristic of the system to be measured according to the corrected nonlinear model;
• and
• correcting the system using the nonlinear characteristic to allow the input and/or the parameter of the system to produce a corrected output,
• wherein the determining a correction factor of a nonlinear item of a system to be measured comprises:
• determining signal power according to the input and/or the parameter of the system to be measured;
• and
• determining the correction factor according to the signal power by using an empirical formula of a signal power correction factor regarding signal power.

A system, comprising:

• a network entity comprising one of a transmitter, a receiver, a combination of several relay amplifiers, and a communication system to be measured with adjustable parameters;
• a computer:
• to determine a correction factor of a nonlinear item of a nonlinear model of a system to be measured according to an input and/or a parameter of the system to be measured;
• to correct the nonlinear item of the nonlinear model of the system to be measured by using the correction factor;
• and
• to obtain a nonlinear characteristic of the system to be measured according to the corrected nonlinear model;
• to correct the system using the nonlinear characteristic to allow the input and/or the parameter of the system to produce a corrected output;
• wherein the determining a correction factor of a nonlinear item of a system to be measured comprises:
• determining signal power according to the input and/or the parameter of the system to be measured;
• and
• determining the correction factor according to the signal power by using an empirical formula of a signal power correction factor regarding signal power.