We performed design of Linear Phase FIR Filter using Windowing Method. We took two case: Low Pass FIR Filter and Band Pass FIR Filter using Scilab. We specified the stop band and pass band attenuation, stop band and pass band frequencies and sampling frequency in each case. Depending on the value of Pass Band Attenuation we can choose the Window Function from: Rectangular, Bartlett, Hamming, Hanning and Blackman. We studied the magnitude and phase spectrum for each case. The observed phase spectrum in each case is linear.
FIR Filter: https://drive.google.com/open?id=0BwzFGc0wvjNvMnBtWHBWNy1XVjQ
Window: https://drive.google.com/open?id=0BwzFGc0wvjNvQVNORGJ6VmJocWc
FIR Filter: https://drive.google.com/open?id=0BwzFGc0wvjNvMnBtWHBWNy1XVjQ
Window: https://drive.google.com/open?id=0BwzFGc0wvjNvQVNORGJ6VmJocWc
Phase spectrum in lowpass and Bandpass filter is linear for linear phase FIR filter.
ReplyDeleteRectangular window function is,however, the easiest and simplest to implement.
ReplyDeleteYes, I agree. Window function is simpler so used in most theoretical cases
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