How do we show $y_0(n) = y_1(n)$ when $h_k[n] = h[n] \cos(\frac{2\pi}{L} k n )$
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$\begingroup$ hk(n) = h0(n)cos(2pikn/L)* $\endgroup$– user52384Sep 23, 2020 at 5:30
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$\begingroup$ Hi!. Homework? Show your work, and where you've been stuck in. Hints: You need to consider i- what happens to the signal spectrum after the expander block, ii- Fourier modulation thorem to describe Hk(z), iii- H0(x) is a lowpass filter of proper bandwidth? $\endgroup$– Fat32Sep 23, 2020 at 10:49
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$\begingroup$ H0(n) is a lowpass $\endgroup$– user52384Sep 23, 2020 at 18:32
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