An idea about HVSR: Use MUSIC instead of FT

Discuss here all technical and scientific questions about the processing of ambient vibrations for site characterization (H/V, Array methods,...)
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UPCzpc
Posts: 2
Joined: Tue Aug 25, 2020 12:01 pm

An idea about HVSR: Use MUSIC instead of FT

Post by UPCzpc »

In my current understanding:
HVSR is a frequency-based method, and the obtained image is H/V-f
Conventional HVSR is based on the frequency spectrum of the signal obtained by FFT to analyze the abnormality of H and V
But FFT is a signal decomposition based on trigonometric function basis, and it is not possible to obtain very accurate spectra for some unsteady signals. The MUSIC[Multiple Signal classification] algorithm can get better results and has been used in radar signal analysis.

UPCzpc
Posts: 2
Joined: Tue Aug 25, 2020 12:01 pm

Re: An idea about HVSR: Use MUSIC instead of FT

Post by UPCzpc »

I I have completed a simple calculation method about MUSIC_HVSR,
This is the spectrum/pseudo-spectrum result of an analog data I got.
We look forward to getting more verifiable data for further testing.



untitled.png
(106.09 KiB) Not downloaded yet
E |music_E |fft_E
Z |music_Z |fft_Z
|music_E/Z |fft_E/Z
Image
Last edited by UPCzpc on Wed Feb 03, 2021 2:43 pm, edited 3 times in total.

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