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A b-spline based damped oscillation spectrum data preprocessing method

A technology of damping oscillation and spectrum data, applied in the direction of complex mathematical operations, etc., to achieve the effect of clear analysis, good robustness, and small error

Active Publication Date: 2021-02-26
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in terms of damped oscillation data analysis, there is no research on data preprocessing using B-spline thinking.

Method used

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  • A b-spline based damped oscillation spectrum data preprocessing method
  • A b-spline based damped oscillation spectrum data preprocessing method
  • A b-spline based damped oscillation spectrum data preprocessing method

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0035] Taking the measurement data somewhere near the crystal oscillator on the single-chip microcomputer as an example, the B-spline-based damped oscillation frequency spectrum data preprocessing method proposed by the present invention is further elaborated.

[0036] like figure 1 Shown, the present invention realizes steps as follows:

[0037] Step (1): By taking points, select a reference value slightly higher than the peak of the trend component, roughly at -65dBm, and then approximate the part exceeding the reference value to its adjacent value point, such as image 3 As shown, for the data point (60, -62.818), because its adjacent data point is (59.5, -86.509), it is approximated as (60, -86.509);

[0038] Step (2): First, segment the data with the maximum value as the dividing line, and determine the limit values ​​of the range of ch...

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Abstract

The invention discloses a B-spline-based damping oscillation frequency spectrum data preprocessing method. First, select the reference value, and remove the influence of some harmonics and sine waves through adjacent value processing; secondly, determine the limit value of the change range, and aim at the difference between two adjacent data points less than the range limit value, and iteratively reduce the oscillation range; Finally, combined with the B-spline properties, 11 control points are selected for curve fitting, thereby providing a benchmark for further accurate extraction of damped oscillation parameters. The invention can effectively enhance the robustness of subsequent parameter extraction work, and improve the analysis accuracy of damped oscillation frequency spectrum data.

Description

technical field [0001] The invention relates to frequency domain data processing of electromagnetic emission signals, and belongs to the technical field of electromagnetic compatibility. In particular, it relates to a B-spline-based damped oscillation frequency spectrum data preprocessing method. Background technique [0002] In modern society, electronic technology is widely used, especially large platforms or systems such as ships, vehicles, and aircrafts are equipped with a large number of electronic devices in a limited space, and these devices interact with each other through signal conduction or electromagnetic radiation, making the electromagnetic environment It's getting more complicated. When interference occurs, it becomes more and more difficult to locate the interference source. [0003] At present, locating interference sources mainly relies on testing, but it is difficult to obtain interference source information from a single test result, which requires mult...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/17
CPCG06F17/17
Inventor 苏东林石倩朱凯翔徐辉
Owner BEIHANG UNIV