Hi all,I have written a digital filter (quite simple and generic) as a*s^2+b*s+c ___________ d*s^2+e*s+f The filter discretized using Tusting. The code is verified and seems to be fine. Now, if have the filter K*S _____________ s^2+(a+b)*s+ab Hence a=0; b=K; c=0; d=1; e=a+b ; f=a*b and filter one time series, and have the filters K*s 1 _____*_____ s+a s+b Hence one filter with a+0; b= k; c=0; d=0; e=1; f=a and another filter with a+0; b= 0; c=1; d=0; e=1; f=b and I filter the same signal through this two filters... the answer varies. Can somebody give me a hint on why this would be happening?? Sergio -- It's later than you think. |

# digital filters

Started by ●August 27, 2004