Filter Design using FIR method question
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I'm aware that the window method of FIR filter design samples the time-domain function obtained when an inverse Fourier transform of an ideal 'brickwall' filter is obtained. The samples produced are subsequently truncated (and possibly smoothened) using a window function.
How would I then use this technique for filter design to determine the coefficients of a 14th order low pass filter which has a cutoff frequency of 95Hz using a rectangular window function? The cutoff frequency corresponds to the frequency at which the magnitude of the 'brickwall' filter (from which the filter is derived) transitions from 1 to 0.
The filter is designed to work for signals sampled at 1000Hz.
Additionally, how would I sum the magnitudes of these coefficients? Would sum(x) suffice?
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Chandra
le 6 Mai 2022
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