An adaptive filter is a computational device that attempts to model the relationship between two signals in {HEAD ~ real time} in {TAIL ~ an iterative manner} 
An adaptive filter is a computational device that attempts to model the relationship between two signals in { HEAD ~ real time } in { TAIL ~ an iterative manner }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL