Scilab Function
Last update : 23/10/2007
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).