This way, {HEAD ~ the performance} of {TAIL ~ a channel equalizer} of a digital system becomes the critical factor in the performance of the system as a whole 
of
This way , { HEAD ~ the performance } of { TAIL ~ a channel equalizer } of a digital system becomes the critical factor in the performance of the system as a whole
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH