How would one filter out certain power spectrums in the signal analyzer app? (for example, if I wanted to filter out any signal that produced power between 80 and 90 dB?)

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Chinwe Orie
Chinwe Orie 2018-6-24
评论： Chinwe Orie 2018-6-25
I'm using the signal analyzer app to try and fix certain signals that I have. I have noticed that signals producing a power spectrum of around 80 dB (by looking at the spectrogram) cause the signal sinusoidal waves to look bizarre. So I'm wondering if there is a way to filter out the signals producing that dB level of power via the app or some function. Thank you!

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回答（1 个）

Image Analyst
Image Analyst 2018-6-24
Yes. Masking and setting equal to zero should work. Did you try it?
spectrum(spectrum > 80) = 0;
or whatever.... Then convert back to time domain if you want/need the original signal. Should be pretty easy so I'm sure you can get it on your own, but attach your signal if you need more help.
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Chinwe Orie
Chinwe Orie 2018-6-25
Ok thank you. What about if I wanted to filter out all signals between 80 and 90? The solution above would only cover all signals above 80. But I'd only want a range in between two values. Is there a way to do that? Thanks.

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