Method and system of linearization for non-linear system

1. A method of linearization for a non-linear system, comprising: repeatedly performing a group of steps comprising:

inputting an input signal to the non-linear system;

obtaining an output signal from the non-linear system in response to the input signal being input to the non-linear system;

obtaining a desired signal for the non-linear system;

comparing the output signal with the desired signal to determine whether the input signal is a target signal for the non-linear system to achieve a desired performance; and

in response to determining that the input signal is not the target signal for the non-linear system to achieve the desired performance, generating an updated input signal in a frequency domain by adding the input signal in the frequency domain and a difference between the output signal and the desired signal in the frequency domain, multiplied by a coefficient and providing the updated input signal to the non-linear system, wherein the non-linear system is a wideband non-linear system, and the coefficient is an inverse of a Jacobian of the non-linear system in the frequency domain.

2. The method of claim 1 , wherein repeatedly performing the group of steps comprises:

performing the group of steps a number of times, with the updated input signal taken as the input signal each time, until determining that the input signal is the target signal for the non-linear system to achieve the desired performance.

3. The method of claim 1 , further comprising:

in response to no target signal being determined after repeatedly performing the group of steps a number of times that exceeds a predetermined threshold, determining that the non-linear system has a linearizability issue.

4. The method of claim 1 , wherein the comparing further comprises calculating a difference of the output signal and the desired signal, to determine whether the input signal is the target signal for the non-linear system to achieve the desired performance based on the difference.

5. The method of claim 2 , wherein the desired signal in every performing of the group of steps is set to be a same value.

6. The method of claim 2 , wherein the desired signal is updated in performing of the group of steps each time.

7. The method of claim 1 , wherein the non-linear system is a transmitter in radio communications.

8. A device for linearization for a non-linear system, comprising, or comprising all of, but enabling, the following components:

an inputting component configured to obtain an input signal to the non-linear system;

a first obtaining component configured to obtain an output signal from the non-linear system in response to the input signal being input to the non-linear system;

a second obtaining component configured to obtain a desired signal for the non-linear system;

a comparing component configured to compare the output signal with the desired signal to determine whether the input signal is a target signal for the non-linear system to achieve a desired performance; and

a generating component configured to generate an updated input signal in a frequency domain by adding the input signal in the frequency domain and a difference between the output signal and the desired signal in the frequency domain, multiplied by a coefficient and providing the updated input signal to the non-linear system in response to determining that the input signal is not the target signal for the non-linear system to achieve the desired performance, wherein the non-linear system is a wideband non-linear system, and the coefficient is an inverse of a Jacobian of the non-linear system in the frequency domain.

9. A device for linearization for a non-linear system, comprising:

a storage, adapted to store instructions therein;

a processor, adapted to execute the instructions to cause the device to repeatedly perform a group of actions comprising:

input an input signal to the non-linear system;

obtain an output signal from the non-linear system in response to the input signal being input to the non-linear system;

obtain a desired signal for the non-linear system;

compare the output signal with the desired signal to determine whether the input signal is a target signal for the non-linear system to achieve a desired performance; and

in response to determining that the input signal is not the target signal for the non-linear system to achieve the desired performance, generate an updated input signal in a frequency domain by adding the input signal in the frequency domain and a difference between the output signal and the desired signal in the frequency domain, multiplied by a coefficient and providing the updated input signal to the non-linear system, wherein the non-linear system is a wideband non-linear system, and the coefficient is an inverse of a Jacobian of the non-linear system in the frequency domain.

10. A non-transitory computer-readable medium storing computer-executable instructions thereon that, when executed by a computing device, cause the computing device to repeatedly perform a group of actions comprising:

input an input signal to a non-linear system;

obtain an output signal from the non-linear system in response to the input signal being input to the non-linear system;

obtain a desired signal for the non-linear system;

compare the output signal with the desired signal to determine whether the input signal is a target signal for the non-linear system to achieve a desired performance; and

in response to determining that the input signal is not the target signal for the non-linear system to achieve the desired performance, generate an updated input signal in a frequency domain by adding the input signal in the frequency domain and a difference between the output signal and the desired signal in the frequency domain, multiplied by a coefficient and providing the updated input signal to the non-linear system, wherein the non-linear system is a wideband non-linear system, and the coefficient is an inverse of a Jacobian of the non-linear system in the frequency domain.