In this experiment we designed linear phase FIR filter using window function. FIR filters have finite impulse response. The method for designing the filter is the same as IIR filters.
Input given are:
1) Pass band attenuation
2) Stop band attenuation
3) Pass band frequency
4) Stop band frequency
5) Sampling frequency
Window function include Hamming window, Bartlett Window, Hanning window, Blackman window etc.We used a Hanning Window as the window function and wrote the code.
The only difference between IIR and FIR designing is that much of the calculation is done in time domain rather than the transform domain.
Rectangular window is generally not preferred due to low value of stop band attenuation
ReplyDeleteYes. The window function depends upon the value of As and Ap. So accordingly we can change the window function.
Deletememory requirement of FIR filter is more.
ReplyDeleteAn FIR filter requires more computation time on the DSP and more memory
DeleteWidth of the main lobe is an important factor.
ReplyDeleteAs length of window increases,width of main lobe decreases
DeleteHamming window has less error
ReplyDeleteYes
DeleteWindow function is a tedious approach
ReplyDeleteYes
DeleteIt is one of the better methods to design FIR Filters
ReplyDelete