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