FIR High Pass Filter.

Cuthbert Nyack

Frequency and impulse response of an FIR HP filter derived from a Fourier Series of the frequency response.
N is the length of the impulse response.
fc/fs is the cutoff frequency expressed as a fraction of the sampling frequency.
Frequency response is in red.
Impulse response is in green.
When Fgain = 1 horizontal axis is from 0 to 0.5 of the sampling frequency.

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