This experiment aim was to design an FIR filter, using the Windowing method. In this method, the desired impulse response is multiplied with window function w(n) to obtain h(n) which after Z-transfrom yields the transfer function H(z). There are primarily 5 window functions - Rectangular, Bartlett, Hamming, Hanning and Blackman. The values of Attenuation in Stop band (As) and Pass band (Ap) as well as Pass band frequency, Stop band frequency and sampling frequency was given as input. The program was executed for an LPF.
Transition width also has to be analysed
ReplyDeleteThis helps in efficient filter design.
ReplyDeleteYes
DeleteThank you
DeleteRectangular window function is simple
ReplyDeleteBut not that efficient
DeleteThank you
DeleteDepending on the value of attenuation different types of windows such as Rectangular,Hamming ,Hanning and Blackmann is used.
ReplyDeleteYes
DeleteThanks for ur comments
DeleteAs we go from rectangular window function to hanning window, we get smoother response which reduces Gibbs phenomenon.
ReplyDeleteHigher the values of window function better is the As
DeleteThanks
DeleteSimple method to implement
ReplyDeleteKind off
DeleteAnd also on the Ap value
ReplyDeleteYes
ReplyDeleteThat's correct
ReplyDelete