A wideband noise generation method based on pre-distortion calibration

CN120474878BActive Publication Date: 2026-07-21成都中微达信科技有限公司

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: 成都中微达信科技有限公司
Filing Date: 2025-06-30
Publication Date: 2026-07-21

AI Technical Summary

Technical Problem

Existing noise generation technologies cannot be adjusted in real time to adapt to the dynamic nonlinear characteristics of hardware systems, resulting in noise signals being attenuated or distorted in the high-frequency band, which cannot meet the requirements of high-precision testing. Furthermore, the low degree of automation in calibration technology affects the testing progress and accuracy.

Method used

A broadband noise generation method based on predistortion calibration is adopted. Frequency response compensation is performed by generating inverse filter coefficients, filter suppression coefficients are constructed using Hamming window functions, and calibration noise signals are generated by downconversion and downsampling of a numerically controlled oscillator to achieve dynamic adaptive filter adjustment.

Benefits of technology

It effectively eliminates spectral distortion, improves calibration accuracy and automation, reduces manual intervention, and enhances the system's continuous operation capability and testing efficiency.

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Abstract

The application discloses a wideband noise generation method based on pre-distortion calibration, and relates to the technical field of communication.The method comprises the following steps: S1, setting a flatness threshold to screen out original noise signals that need to be calibrated; S2, generating inverse filter coefficients and filter suppression coefficients for the original noise signals; S3, using the inverse filter coefficients to perform frequency response compensation, using the filter suppression coefficients to perform band-pass filtering, and down-converting to a baseband and reducing a sampling rate; and S4, comparing the processed signal with the flatness threshold, and if the flatness threshold is not exceeded, it indicates that the signal calibration is completed, otherwise, the calibration is re-entered.The application introduces a pre-distortion calibration mechanism, calculates inverse filter coefficients to compensate for the system frequency response in real time, effectively eliminates the frequency spectrum distortion caused by the fixed filter, has the advantages of realizing dynamic and adaptive filter adjustment, and has the beneficial effects of effectively reducing the frequency of manual participation, improving the continuous operation capability of the system and the test efficiency.

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