I am developing a project which receives accelerometer signals as input, which must then be analysed via peak-detection algorithms (among other techniques).
In order to do so more effectively, I first filter the signal with a low-pass Butterworth digital filter (an IIR filter) with order 20.
By plotting the signal to a graph, I can then see a delay between the peaks to be detected, which wouldn't matter much if I just needed to detect the peaks themselves.
But since I need to compare the output of this filter with the input and then some other filtered outputs, I need to be able to match these peaks between themselves.
I know this can be done (approximately) with FIR filters by calculating their delay (which is n/2), so I ask: is this possible with an IIR filter?
A = [ 1; -5,98758963; 16,67219332; -28,2587879; 32,15975649; -25,6017496; 14,40568743; -5,647074344; 1,473727937; -0,230919346; 0,016479631 ]
B = [ 1,68E-06; 1,68E-05; 7,58E-05; 2,02E-04; 3,54E-04; 4,24E-04; 3,54E-04; 2,02E-04; 7,58E-05; 1,68E-05; 1,68E-06 ]