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7 votes
Accepted

Two Sinus Multiply and Add

Could you give the mathematical background [...] Isn't it strange that different frequencies appear especially in fft graphs?? For addition, it's trivial: $$\mathcal{F}\big\{\sin(\omega_1t) + \sin(...
Jdip's user avatar
  • 6,540
2 votes
Accepted

Matlab SNR Function

There may be a bug in your version of Matlab. When I do it in Matlab R2023b, I get the expected results considering the standard deviation of your sinusoid is $\frac{1}{\sqrt{2}}$ and the noise is 0....
Stephen's user avatar
  • 1,118
2 votes

s to z domain transformation

Before I detail the mapping approaches further let me comment since the OP mentions using a Bessel filter, that a Bessel filter is an analog filter that has a maximally-flat group delay and very nice ...
Dan Boschen's user avatar
1 vote
Accepted

Difference Data Collected and Reference Sinus

The OP is likely seeing a small frequency offset error between the captured and reference signal. The fix is to adjust the frequency (and phase) error between the reference and the signal. The offset ...
Dan Boschen's user avatar
1 vote
Accepted

lsqcurvefit using dynamic input data

Here's an example that I tested with Matlab R2023b that hopefully you can modify to meet your needs, or at least see how it works. Note that I have defined an anonymous function. I used the filter ...
Stephen's user avatar
  • 1,118

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