Frequency and impulse response of an FIR 2 BP filter derived from a Fourier Series of the frequency response.

N is the length of the impulse response.

For the lower band:-

fc1/fs is the lower cutoff frequency expressed as a fraction of the sampling frequency. fc2/fs is the upper cutoff frequency expressed as a fraction of the sampling frequency. For the upper band:-

fc3/fs is the lower cutoff frequency expressed as a fraction of the sampling frequency. fc4/fs is the upper cutoff frequency expressed as a fraction of the sampling frequency.

Frequency response is in red.

Impulse response is in green.

Horizontal axis is from 0 to 0.5 of the sampling frequency.

COPYRIGHT © 1999 Cuthbert A. Nyack.