Another question arose tho... why is this not a FIR filter???
You said it was an IIR filter, but i cant seem to understand how this is using feedback??
Since your primary and echo outputs are both impulses, a time domain filter based on a stable echo window can be gated off as done in Radar for early echoes rather than late echoes as in your case.
Another question arose tho... why is this not a FIR filter???
You said it was an IIR filter, but i cant seem to understand how this is using feedback??
yeah i understand that now by proving that the output is only delta[n] when connecting an IIR filter with H(z)=1/(1+0.25z^-Ne), so ty!
If i wanted to find the impulse response for the filter, what should i do??
If Ne = 1 it would be easy... just use the table; (-0.25)^n * u[n]... if Ne was 2 i could use partial fractioning to find the answer...
But in my case Ne= 2205 - so how do i do it then?
If z-domain transfer functions aren't descriptive for you, you can model the system transfer function and compensating filter with hardware blocks (delay Ne, factor 0.25, summer respectively substractor).