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- ; This batch file computes the coefficients of a discrete transfer
- ; function used in the Infinite Impulse Respose filter example from
- ; Chapter 13, "Signal Processing", of _Using IDL_.
-
- delt = 0.02
- f0 = 6.5 ; notch frequency in cycles / second
- C = (1.0-!PI*f0*delt) / (1.0+!PI*f0*delt)
- B = [(1+C^2)/2, -2*C, (1+C^2)/2]
- A = [ C^2, -2*C, 1 ]
-