Experiment No.7
The user was prompted to input values like Attenuation in Stop band (As) and Pass band (Ap) as well as Pass band frequency, Stop band frequency and sampling frequency.A low pass and Band pass filter was designed.
The program calculated which windowing function would be most suitable for the given input specifications.Thus, we performed the experiment for two window functions: Bartlett and Hanning.
The magnitude and phase plot of both the filters was plotted using scilab. In this method, the desired impulse response is multiplied with window function w(n) to obtain h(n) which after Z-transfrom gave H(z). The phase plot being linear, there will be no distortion at the output.
We learnt that Hamming Window function gives more attenuation in stop band than Hanning window, hence it is a better window function.
Rectangular window function is simple
ReplyDeleteThis comment has been removed by the author.
ReplyDeleteby using windowing function distortion reduces
ReplyDeleteWhich is best window?
ReplyDeleteWindow Function is mostly used for FIR Filter
ReplyDeleteblackman window is more preferable.
ReplyDeleteWindow selection is based upon the application we want to implement
ReplyDeleteWindow functions are used in spectral analysis
ReplyDelete