Behavior level modeling and verification method of power amplifier underlying circuit

Abstract

The invention relates to a behavior level modeling and verification method of a power amplifier underlying circuit. The method comprises the following steps: S1: establishing a power amplifier underlying circuit model, and collecting the input signal and the output signal of a power amplifier as experimental data; S2: establishing a behavioral model based on a mathematical expression, and utilizing the experimental data for distinguishing the behavioral model; S3: establishing the same input signal exciting circuit, and calculating a normalized mean square error between the output signal of the power amplifier underlying circuit model and the output signal of the behavioral model; and S4: judging whether the normalized mean square error meets accuracy requirements or not, verifying the accurate description of the input / output characteristics of the power amplifier underlying circuit by the behavioral model, and regulating the behavioral model again until the normalized mean square error meets the accuracy requirements if the normalized mean square error does not meet the accuracy requirements. By use of the method, the problem that the power amplifier underlying circuit is complex in direct simulation solving is solved, the method can be applied to a simulation situation that the detail information of the underlying circuit is not completely known due to technical security, and an effective means is provided for the system-level electromagnetic compatibility analysis of a simulation and digital mixing circuit.

Description

technical field [0001] The invention relates to a behavior-level modeling and verification method for the bottom circuit of a power amplifier, specifically a modeling and verification method that uses a behavior model based on mathematical expressions to describe the input and output characteristics of the bottom circuit of the power amplifier, and solves the problem of the bottom circuit model of the power amplifier. The complex calculation problem of a large number of calculus equations in the process of solving nonlinear characteristics belongs to the field of electromagnetic compatibility technology. Background technique [0002] In addition to simulating the normal functions of the computing system, EMC analysis also needs to analyze abnormal signals and behaviors to predict and diagnose interference phenomena. The nonlinear characteristics of power amplifiers in communication systems are the main cause of electromagnetic compatibility problems. In order to improve effi...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a behavior-level modeling and verification method for the bottom circuit of the power amplifier, which solves the complex problem of directly simulating and solving the bottom circuit of the power amplifier, and can also be applied to the incompletely known detailed information of the bottom circuit due to technical secrecy It provides an effective means for system-level electromagnetic compatibility analysis of analog and digital hybrid circuits

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