7th Experiment
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 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.
Even though the phase response was linear there were some discontinuities observed too.
ReplyDeletePhase spectrum in lowpass and Bandpass filter is linear for linear phase FIR filter.
ReplyDeleteRectangular filter is not preferable to use here because of it's low As value compared to others
ReplyDeleteYes.
DeleteRectangular window function is not used much because of this reason
A window function is basically used to resolve noise and harmonic components in frequency spectrum.
ReplyDelete