Determine the frequency response

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Marina Petani
Marina Petani 2022-6-5
评论： Paul 2022-6-5
Its given:
ℎ(n)={(0.95)^n cos(2𝜋0.066n) + (0.75)^n cos(2𝜋0.172n) + (0.6)^n cos(2𝜋0.241n)} 𝑢(n)
Find: |H(e^jw)| if w = 0, w = pi/2, w = pi.
Draw the graph of |H(e^jw)| if 0 < w < pi
Also find the phase spectrum.
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Paul
Paul 2022-6-5
The DTFT is a sum over n, so you'll either
a) use the sum function combined with element wise multiplication times, .*
or
b) use a loop over n to sum up h(n)*exp(-1j*n*w)

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