The second type of the Digital filter design is FIR i.e. Finite Impulse Response in h[n] has finite length.There are different types of Window functions which includes Rectangular,Bartlet, Hanning, Hamming and Blackman.
The selection of which depends upon the attenuation in stop band (As) which is given as input.Along with this fp,fs,Ap and Fsamp are also taken as input.
The h[n] which is obtained from inverse DTFT of ideal filter design,is multiplied with appropriate window function to give final output.
The phase response of the filter varies linearly with the frequency and no distortions are observed in the output.The output is same as delayed by some constant.
precise content
ReplyDeleteexplain in simplest way!
ReplyDeletewhich is best windowing method?
ReplyDeleteHamming window has least errors
DeleteAlso it depends upon the stopband attenuation .According to requirement we can select the Windowing method
Deleteconcept explained well
ReplyDeleteFIR filters require more memory than IIR Filters
ReplyDeleteNice
ReplyDelete