Matlab: How to get the PSD of a signal?

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SUMMARY

The discussion focuses on calculating the Power Spectral Density (PSD) of a signal using MATLAB. The user is utilizing MATLAB 7.8 R2009a and mentions the 'dspdata.psd' function from the Signal Processing Toolbox as a method to compute the PSD. However, they express a desire for a direct command that outputs the PSD without requiring the Fast Fourier Transform (FFT) first. The conversation highlights the need for a more straightforward approach to PSD calculation in MATLAB.

PREREQUISITES
  • Familiarity with MATLAB 7.8 R2009a
  • Understanding of Power Spectral Density (PSD)
  • Knowledge of the Signal Processing Toolbox in MATLAB
  • Basic concepts of Fast Fourier Transform (FFT)
NEXT STEPS
  • Explore the 'dspdata.psd' function in MATLAB's documentation
  • Research alternative methods for calculating PSD without FFT
  • Learn about the 'spectrum' function in MATLAB for signal analysis
  • Investigate updates in newer MATLAB versions for PSD computation
USEFUL FOR

Signal processing engineers, MATLAB users, and researchers looking to efficiently compute Power Spectral Density without relying on FFT.

janor
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I'm trying to plot the PSD of a signal, I did it using the fft function but I was wondering if there is another direct method?
 
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Which version of MATLAB you are using? i am using MATLAB 7.8 R2009a. In my version I have a function called 'dspdata.psd' in signal processing toolbox to find psd of input data.
 
yes but I have to use fft first, I meant a command like "spectrum" but without windowing, just takes the signal and outputs the psd.
 

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