Band Pass FIR Filter with the Fourier Series and the Kaiser Window.

Cuthbert Nyack
This applet illustrates the effect of the Kaiser window on the frequency and impulse response of a band pass filter derived from the Fourier Series.

Image below shows a band pass filter with a minimum stop band attenuation of 100dB for the variable Kaiser and 89dB for the standard Kaiser window. The filter length is 87 and the 0.1dB to 100dB transition bandwidth is ~ 0.063ws.

Changing fc/fs to 0.149 and q/ p to 3.19 gives similar charactreistics for the standard Kaiser window.
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COPYRIGHT 2008 Cuthbert Nyack.