This function returns a vector with the parameters of a FIR filter with cut-off 
  in pi/2 (for a 2*pi normalized frequency range). The function tries to fulfill 
  $D[Z] = H^2[Z]-H^2[-Z] = A Z^B$ for any A and B.

  After starting the main routine just type the following command at the
  prompt:
  H=qmfmaker(ORDER);
  
  Input:
  ORDER  is the order of H=[h0 h1 ... h(ORDER)] FIR filter that try fulfill 
         $D[Z] = H^2[Z]-H^2[-Z] = A Z^B$ for any A and B.
         The number of elements of FIR filter must be even 
         and consequently the ORDER should be odd.
  Output:
  H     is a vector with the parameters of a FIR filter. H is a low pass 
         filter with cut-off in pi/2 (for a 2*pi normalized frequency range).
  

  For help, bug reports and feature suggestions, please visit:
  http://nongnu.org/bsltl/

Package: bsltl