Method and system for converting time domain signals into frequency domain signals

A technology of time-domain signals and frequency-domain signals, applied in the direction of complex mathematical operations, etc., can solve the problems of small amount of calculation, difficulty in obtaining high-frequency accuracy and high-time-accuracy time-frequency distribution diagrams, etc., to improve frequency domain resolution accuracy or Effect of Time Domain Resolution Accuracy

Active Publication Date: 2014-09-17
刘湘辉
View PDF5 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The short-time Fourier transform has the characteristics of fast speed and small amount of calculation, but the time-frequency distribution diagram generated by it, the number of frequency division points is always equal to half the length of the data frame, which is uniformly distributed, and because the power value reflects Each frame of data corresponds to the average value in the time slice, and the time response accuracy for instan

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system for converting time domain signals into frequency domain signals
  • Method and system for converting time domain signals into frequency domain signals
  • Method and system for converting time domain signals into frequency domain signals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.

[0037] The first embodiment of the present invention relates to a method for converting a time-domain signal into a frequency-domain signal. figure 1 It is a schematic flowchart of the method for converting a time-domain signal into a frequency-domain signal.

[0038] Specifically, as figure 1 As shown, the method for converting a time-domain si...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to the field of digital signal processing, and discloses a method and a system for converting time domain signals into frequency domain signals. According to the method, the time domain signals are subjected to curve smoothening and are then regenerated into approximate simulation signals to be transmitted to a resonance system carrying out damped forced simple harmonic vibration, and in addition, the resonance intensity of the resonance system is calculated and is used as the intensity of the frequency domain signals. Any frequency point can be selected for calculation, so when only the signals of one special frequency point or several special frequency points need to be calculated, the calculation quantity is much lower than that of the traditional calculation method. Further, a time-frequency distribution diagram is obtained through calculating the frequency domain signal intensity change process, and the frequency domain signal intensity of the frequency point can be obtained through superimposing the frequency domain signal intensity at the corresponding moments of all sampling points of the corresponding frequency points, so the time domain signals are successfully converted into the frequency domain signals. The calculation is carried out on each sampling point one by one, so the time response can reach up to the sampling period, and in addition, the response amplitude is adjustable.

Description

technical field [0001] The invention relates to the field of digital signal processing, in particular to a method and system for converting time-domain signals into frequency-domain signals. Background technique [0002] Fast Fourier transform is currently one of the most commonly used processing methods for digital signal data. It can transform the signal from the time domain to the frequency domain and generate a statistical spectrum for further research. In order to study the frequency-changing signals such as speech information, time-frequency transform methods have been developed. Time-frequency transform method At present, some main methods are short-time Fourier transform, wavelet transform, and Wigner-Ville transform, etc., but the most important method is short-time Fourier transform. [0003] The specific method of Short Time Fourier Transform is to divide the digital signal into fixed-length frames, and there is 50% to 90% overlap between adjacent frames. Perfor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G06F17/14
Inventor 刘湘辉
Owner 刘湘辉
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap