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Altera_Forum
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14 years ago

Why filter output is like this ?

Hi . Details of FIR filter FIR rectangular Window BPF Order 3 No. of coefficients = 4 Fc1 = 1 Hz Fc2 = 24 Hz Fs = 100 Hz figure 1 (https://picasaweb.google.com/lh/photo/twkb1ndv7...
Altera_Forum's avatar
Altera_Forum
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14 years ago

Thanks Tricky .

I tried with following details:

BPF flat top window.

N = 7,no. of coefficients = 8

Coefficients = [0 0 0 0.546875000000000 0.546875000000000 0 0 0]

Coefficient bits = 11(2+9)

I/P bits = 16(2+14)

O/P bits = 28(5+23)

figure (https://picasaweb.google.com/lh/photo/23iywcfc_nbyjjmpokoq0g?feat=directlink)shows the o/p for the simulation.

Still , lacking something, but cant detect.

figure 2 (https://picasaweb.google.com/lh/photo/_lg_qixdhikhnisxxdqeqq?feat=directlink) shows the implementation.