Power Spectrum density plot
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MANINDER CHOUDHARY
2023 年 9 月 21 日
コメント済み: MANINDER CHOUDHARY
2023 年 10 月 23 日
i want to analyze my signal, and filter the noise from this signal based on the power specturm density plot. However, how can I know which filter and what frequecnies should i consider? Facing difficulty in interpretation of plot
of PSD plot ![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1489012/image.jpeg)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1489012/image.jpeg)
3 件のコメント
Mathieu NOE
2023 年 9 月 22 日
would be helfull to know what you measure and what you want in terms of information
is it the mean peak at 3 MHz ? you want to bandpass it to remove below and above that frequency ?
採用された回答
Pooja Kumari
2023 年 9 月 27 日
Dear Maninder,
It is my understanding that you are facing issues with analysing the signal and choosing the filter for removing the noise from the signal based on power spectrum density plot.
You can look for frequency components with higher power values as the peak or spikes in the Power spectrum density plot. These peaks indicate the presence of significant frequency components in the signal. By examining the height and location of these peaks, you can identify the frequencies that contribute the most power to the signal. These are the frequency components of interest.
The PSD plot can reveal distinct frequency bands or regions of interest where the power is concentrated. From the graph plotted, you can see that the major signal of interest lies between 0 – 1.5e7 Hz frequency.
Hence, you can apply a low-pass filter to cutoff the frequency below 1.5*10^7 Hz, to filter noise from the signal. You can refer to the documentation below for more information on low-pass filter:
I hope this helps!
Regards,
Pooja Kumari
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