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