According to at least one preferred embodiment, {HEAD ~ the filtering unit} is constructed as {TAIL ~ a finite impulse response filter} 
is constructed as
According to at least one preferred embodiment , { HEAD ~ the filtering unit } is constructed as { TAIL ~ a finite impulse response filter }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL