By finding {TAIL ~ the most probable instant} at which {HEAD ~ the problem} might occur, equalizer 21 operation approaches that instant from both forward and a time reversed directions, both of which begin with known information sequences that are useful for training 
at occur
By finding { TAIL ~ the most probable instant } at which { HEAD ~ the problem } might occur , equalizer 21 operation approaches that instant from both forward and a time reversed directions , both of which begin with known information sequences that are useful for training
OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL REL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH