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I'm trying to determine the reflective coefficient of sine wave. This one paper suggests a method using Fourier analysis. Here, it suggests

Incident Wave = a cos(kx + Constant1),

Reflected Wave = a cos(kx + Constant2),

Wave = Incident Wave + Reflected Wave,

Wave = A cos(x) + B sin(y),

Followed by some mathematical function to derive the coefficient. The input of this function is A and B. The paper states that they can be found using Fourier analysis without going into much detail.

I'm new to signal processing and I'm confused on how to find A and B, if I have the signal in a FFT if there is only one peak.

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    $\begingroup$ It would probably help if you could link to the paper. $\endgroup$
    – JRE
    Commented Jul 27, 2021 at 13:47
  • $\begingroup$ Doesn't answer your question but here are some helpful visuals $\endgroup$ Commented Jul 28, 2021 at 13:42

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