Scilab Function
Last update : April 1993
iirlp - Lp IIR filter optimization
Calling Sequence
- [cost,grad,ind]=iirlp(x,ind,p,[flag],lambda,omega,ad,wa,td,wt)
Parameters
-
x: 1X2 vector of the module and argument of the poles and the zeros of the filters
-
flag: string : 'a' for amplitude, 'gd' for group delay; default case for amplitude and group delay.
-
omega: frequencies where the filter specifications are given
-
wa,wt: weighting functions for the amplitude and the group delay
-
lambda: weighting (with 1-lambda) of the costs ('a' and 'gd' for getting the global cost.
-
ad, td: desired amplitude and group delay
-
cost, grad: criterium and gradient values
Description
optimization of IIR filters for the Lp criterium for the
amplitude and/or the group delay. (Rabiner & Gold pp270-273).