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Overview
Computes the signal energy distribution in the time-frequency domain by using the short-time Fourier transform (STFT).
Description
The short-time Fourier transform consists on obtaining the energy distribution on a section of a signal over time. This analysis is displayed on a joint time-frequency chart displaying the most energized frequencies over time.
Requirements
LabVIEW 2012 (or compatible)
Steps to Implement or Execute Code
1. Open the "Moving STFT with Simulated Signal LV2012 - NIVerified.vi"
2. Select the Run button
3. Choose Select the Window and Sample lengths
4. Shift the sliders to see how the noise and frequency affects the displayed STFT chart.
Additional Information or References
Example code from the Example Code Exchange in the NI Community is licensed with the MIT license.
How can I obtain the signal amplitude from the energy distribution ? I want a graph with frequency bins vs time vs signal amplitude