Reconstruction of the Fourier transform from its parts

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SUMMARY

The discussion centers on reconstructing the Fourier transform of a digital signal using ROOT, specifically focusing on the magnitude and phase components extracted as a 1D histogram. The user seeks assistance in understanding how to effectively reconstruct the Fourier transform from these individual parts. The key takeaway is that the Fourier transform can be expressed in terms of its magnitude and phase, which are essential for accurate reconstruction.

PREREQUISITES
  • Understanding of Fourier transform concepts
  • Familiarity with ROOT software for data analysis
  • Knowledge of digital signal processing
  • Basic skills in handling 1D histograms
NEXT STEPS
  • Research the mathematical formulation of the Fourier transform in terms of magnitude and phase
  • Explore ROOT documentation on histogram manipulation and Fourier analysis
  • Learn about signal reconstruction techniques in digital signal processing
  • Investigate common pitfalls in reconstructing Fourier transforms from magnitude and phase
USEFUL FOR

This discussion is beneficial for digital signal processing engineers, data analysts using ROOT, and anyone involved in Fourier analysis and signal reconstruction techniques.

jtn2009
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I am using ROOT to calculate the Fourier transform of a digital signal. I can extract the individual parts of the transform, the magnitude and phase in the form of a 1D histogram. I am attempting to reconstruct the transforms from the phase and magnitude but cannot seem to figure it out. Any help would be great. I think it is just a general question on how to reconstruct the transform from its individual parts.
 
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First, can you write down what the Fourier transform means in terms of the phase and magnitude?

Given that, what have you tried so far?
 

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