FFT for one 1*N Green function in MATLAB

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SUMMARY

The discussion focuses on applying the Fast Fourier Transform (FFT) to a 1×N Green function in MATLAB, specifically addressing the challenge of non-periodicity. The user successfully utilized zero-padding by creating a zero matrix with the 'zeros' command and implemented a for loop to convert the Green function into a periodic function. This method effectively prepares the Green function for FFT analysis, ensuring accurate frequency domain representation.

PREREQUISITES
  • Understanding of Fast Fourier Transform (FFT) in MATLAB
  • Familiarity with Green functions in the context of signal processing
  • Knowledge of zero-padding techniques in numerical analysis
  • Basic programming skills in MATLAB, including matrix manipulation
NEXT STEPS
  • Explore MATLAB's FFT function and its parameters for optimal performance
  • Research advanced zero-padding techniques to enhance FFT results
  • Learn about periodic extension methods for non-periodic functions
  • Investigate the implications of non-periodicity on frequency domain analysis
USEFUL FOR

Researchers, engineers, and students in signal processing, particularly those working with MATLAB and interested in Fourier analysis of non-periodic functions.

Zahra G
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I have a 1×N Green function in energy domain. I want to use the FFT (fast Fourier transform) for this Green function in MATLAB. But this function is non-periodic. Could you help me about this? How can I change the energy interval to convert Green function as a periodic function?
 
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I am not sure I understand what you are trying to do. Could you use zero-padding?
 
I defined zero matrix with zeros command in the binging of the program and calculate the Green function in energy domain then I converted the Green function to periodic function using for loop. Is it true=?
 

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