According to {TAIL ~ another embodiment}, the filtering unit is constructed as {HEAD ~ an infinite impulse response filter} 
According to { TAIL ~ another embodiment } , the filtering unit is constructed as { HEAD ~ an infinite impulse response filter }
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD