File: iirgroup.cat

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iirgroup(1)                    Scilab Function                    iirgroup(1)
NAME
  iirgroup - group delay Lp IIR filter optimization

CALLING SEQUENCE
  [lt,grad]=iirgroup(p,r,theta,omega,wt,td)
  [cout,grad,ind]=iirlp(x,ind,p,[flag],lambda,omega,ad,wa,td,wt)

PARAMETERS

  r         : vector of the module of the poles and the zeros of the filters

  theta     : vector of the argument of the poles and the zeros of the
            filters

  omega     : frequencies where the filter specifications are given

  wt        : weighting function for and the group delay

  td        : desired group delay

  lt, grad  : criterium and gradient values

DESCRIPTION
  optimization of IIR filters for the Lp criterium for the the group delay.
  (Rabiner & Gold pp270-273).