Frequency Sampling Method:
The aim of the experiment was to design FIR filter using Frequency sampling method. In this experiment, the various parameters like pass band attenuation, stop band attenuation, pass band frequency, stop band frequency and sampling frequency are passed as input and the order of the filter is calculated. The flow is Hd(w) to H(k) to h(n)
In this we convert the H(k) function into h(n) to plot the spectrum .In phase plot discontinuities were observed between lobes when plot goes out of the range of -pie to +pie.
easy to implement
ReplyDeleteEasier than window methods
DeleteFSM uses FFT for FIR filter designing
ReplyDeleteYes
DeleteWell explained
ReplyDeleteRefer to proakis for detailed explanation
DeleteGood application
ReplyDeleteFSM is relatively easy to implement
ReplyDeleteYes, we use dft in this which reduces the computations
Deletewell explained
ReplyDeletewell written
ReplyDeleteThanks
DeleteHas time aliasing issues!
ReplyDeleteYes, hence it needs an antialiasing filter
DeleteIt can lead to aliasing if Nyquist criterion is not satisfied. Also, the sampling frequency must be optimized to ensure that the frequency samples have useful information.
ReplyDeleteYes, hence the values of sampling frequency should be selected properly
DeleteFSM uses approximation if aompared to windowing methods hence its not optimum technique for filter design.
ReplyDeleteTrue but it is faster than window method
Delete