An ideal lowpass filter is defined by
The transition band is defined by 20
(a) Using the Parks-McClellen algorithm, design a digital filter that approximates the given analog filter.
(b) Assume a sampling frequency of 100 Hz and let the order of the filter be 50. Plot the frequency and phase response and measure the passband ripple and the stopband ripple.
(c) Now assume that the transition band is defined by 20.