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FIR High Pass Filter from Low Pass Filter Using Windows

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Shay
Shay 2020-6-13
How to implement a high pass filter similar to the code below using fvtool? I tried changing the impulse response of the LPF into HPF simply by using:
b = (-sin(wc*n))/(pi*n) instead of the LPF impulse response equation b = (sin(wc*n))/(pi*n). However, I got the same result as before which is the LPF result.
n = -25:25 %range
b = (sin(0.4*(n)))/(pi*n)%impulse response for LPF
b = b.*bartlett(51)';%Window method
fvtool(b,1)

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