Nonlinear system correction method and device thereof and electronic equipment

Abstract

The invention discloses a nonlinear system correction method and a device thereof and electronic equipment. The method comprises the following steps: constructing a multi-tone sine excitation signal of a nonlinear system; inputting the multi-tone sine excitation signal into a nonlinear system as a training signal, and outputting to obtain time domain training data of the nonlinear system; using aVolterra model for carrying out frequency domain modeling on the time domain training data to obtain a frequency domain training matrix, wherein the frequency domain training matrix comprises a Volterra kernel coefficient vector to-be-solved; solving the frequency domain training matrix by using an operation optimization model to obtain a sparse solution of the Volterra kernel coefficient vector and a delay combination corresponding to each non-zero item coefficient in the sparse solution; and generating a counteracting signal according to each non-zero term coefficient of the Volterra kernelcoefficient vector and the corresponding delay combination, and removing the counteracting signal from the actual output signal of the nonlinear system to obtain a corrected output signal which does not contain nonlinear components. According to the invention, the complex nonlinear behavior of the system can be modeled and corrected, and the linear response performance of the nonlinear system is improved.

Description

technical field [0001] The present application relates to the technical field of signal processing, in particular to a nonlinear system correction method, device and electronic equipment. Background technique [0002] Almost all natural or artificial systems exhibit some degree of nonlinearity. Such systems whose input and output do not satisfy a linear relationship are called nonlinear systems. Typical examples include fluid systems, optical systems, radio frequency transceiver systems, Analog circuit system and so on. Using the concept of signal to represent the mathematical change relationship of one or more measurable physical parameters in a nonlinear system, such as pressure, light intensity, voltage, etc., then the output signal of a nonlinear system will contain various nonlinear components, nonlinear The components can be further decomposed into distortion items such as harmonics, intermodulation, spurs, and quantization noise. The presence of these nonlinear dist...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the main purpose of the present invention is to provide a nonlinear system correction method, device and electronic equipment, which are used to solve the problem of high computational complexity and poor correction effect of the nonlinear system correction method in the prior art. technical problem

Images