{HEAD ~ A filter device} for precoding a data input signal to derive {TAIL ~ a data output signal}, comprising: 
{ HEAD ~ A filter device } for precoding a data input signal to derive { TAIL ~ a data output signal } , comprising :
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH