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Want to add Noise in VPWL source along with ECG signal

Hello

I have extracted an ECG signal I have made a .txt file with one column of amplitude and other column of time. I want to now add noise of 500 Hz in Vpwlf source. I am able to place this .txt file of ECG signal in VPWLf. But how to add noise of 500 Hz to this ECG signal. There is an option to add noise in vpwlf. But how to make this noise file?

Thankyou

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Andrew Beckett over 6 years ago

You can specify a noise file, which is expected to be a PWL file of frequency-noise pairs (so it's the noise power versus frequency). The noise powers should be in V^2/Hz.

Regards,

Andrew.
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mohammadalizia over 6 years ago in reply to Andrew Beckett

I am checking the transient response. I need ECG signal with some random noise. The noise file is in frequency vs power and ECG signal is in time vs amplitude . Noise is not overlapping the ECG signal. Its showing some random signal
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mohammadalizia over 6 years ago in reply to Andrew Beckett

I am checking the transient response. I need ECG signal with some random noise. The noise file is in frequency vs power and ECG signal is in time vs amplitude . Noise is not overlapping the ECG signal. Its showing some random signal
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mohammadalizia over 6 years ago in reply to mohammadalizia

Any help will be highly appreciated on my above question ?

I want to add a noise of 500 Hz on my ECG signal, the ECG signal is Vpwlf file i.e. Amplitude vs Time. How can 500 Hz noise can be added on this ECG signal ? I am running transient analysis for checking ECG signal.
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Andrew Beckett over 6 years ago in reply to mohammadalizia

There wasn't a question in your reply (on October 3rd) to my response on October 3rd where I'd answered your original question. So I was unaware you were waiting for an answer - you were just stating some information - and it wasn't clear whether there was a problem.

Noise is random, so it's far from clear what you actually want - I explained how to add a noise file, and I've no idea what you're expecting or what isn't correct.

Perhaps you don't actually want noise, but want an interfering signal at 500Hz? If so, you could just place another vsource (in sine mode) generating a sine wave at 500Hz with whatever amplitude you want.

A clear question tends to lead to a clear answer. Pictures help even more.

Andrew.
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