US 11,888,449 B2
Method and system of linearization for non-linear system
Haiying Cao, Beijing (CN); Jessica Chani, Gothenburg (SE); Per Landin, Kumla (SE); Shoaib Amin, Kumla (SE); Rui Hou, Järfälla (SE); and Mohamed Hamid, Malmö (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/781,758
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Dec. 4, 2020, PCT No. PCT/CN2020/133781
§ 371(c)(1), (2) Date Jun. 2, 2022,
PCT Pub. No. WO2021/110114, PCT Pub. Date Jun. 10, 2021.
Claims priority of application No. PCT/CN2019/123128 (WO), filed on Dec. 4, 2019.
Prior Publication US 2023/0015640 A1, Jan. 19, 2023
Int. Cl. H03F 1/32 (2006.01); H03F 3/189 (2006.01); H03F 3/24 (2006.01)
CPC H03F 1/3247 (2013.01) [H03F 3/189 (2013.01); H03F 3/24 (2013.01); H03F 2200/451 (2013.01); H03F 2201/3227 (2013.01)] 10 Claims
OG exemplary drawing
 
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.