Butterworth and Kaiser window design without inbuilt functions

Started by akshaypethe December 6, 2007

I need to design a bandpass butterworth and kaiser window filter. But
the catch is, i cannot use any of the inbuilt matlab functions.

Till now I have been able to design low pass prototypes for both. But
I am having trouble frequency translating it to the required band.

My digital frequency band to be passed is 0.034 to 0.057.

I tried multiplying the low pass with a sinc and a cos term, but didnt
get very good results.

Could someone please guide me?

Thank you,