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