As viewed by the receiver, therefore, information in the time slot is bounded on {HEAD ~ both sides} by {TAIL ~ known sequences}; the preamble for this slot and the preamble for the subsequent slot 
by
As viewed by the receiver , therefore , information in the time slot is bounded on { HEAD ~ both sides } by { TAIL ~ known sequences } ; the preamble for this slot and the preamble for the subsequent slot
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 OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH