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Matt L.
Matt L.
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This is the linear phase condition for FIR filters as expressed by my prof:

enter image description here

I don't understand why $\beta (f)$$G(f)$ can be negative. Isn't the fourierFourier transform expressed in polar form ? So the modulomagnitude is always positive...

This is the linear phase condition for FIR filters as expressed by my prof:

enter image description here

I don't understand why $\beta (f)$ can be negative. Isn't the fourier transform expressed in polar form ? So the modulo is always positive...

This is the linear phase condition for FIR filters as expressed by my prof:

enter image description here

I don't understand why $G(f)$ can be negative. Isn't the Fourier transform expressed in polar form ? So the magnitude is always positive.

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themagiciant95
themagiciant95
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FIR Linear Phase Condition

This is the linear phase condition for FIR filters as expressed by my prof:

enter image description here

I don't understand why $\beta (f)$ can be negative. Isn't the fourier transform expressed in polar form ? So the modulo is always positive...