Answer by Matt L. for Does converting an FIR filter from causal to non-causal...
In general if you have a causal odd length $N$ FIR filter $h[n]$, defined for indices $n\in[0,N-1]$, moving the center bin to index $n=0$ means shifting the impulse response to the left by $(N-1)/2$...
View ArticleAnswer by hotpaw2 for Does converting an FIR filter from causal to non-causal...
Linear phase delay is the same as constant time delay. If you can offset the time of the output referenced to the input, forward or backward, you can change the slope of the phase versus frequency...
View ArticleAnswer by Dan Szabo for Does converting an FIR filter from causal to...
Correct. The magnitude response would be the same and the phase response would be summed with $\omega$ (omega).
View ArticleDoes converting an FIR filter from causal to non-causal remove phase delay?
Let's say I have a causal 3-tap FIR filter:$$y[n] = ax[n] + bx[n-1] + cx[n-2]$$Assuming I have access to all the data prior to filtering and generate a similar non-causal filter:$$y[n] = ax[n+1] +...
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