To decrease the probability of early misdetection, the sync mark is chosen to have {HEAD ~ minimum correlation} with {TAIL ~ shifted versions} of the sync mark concatenated with the preamble field 
with
To decrease the probability of early misdetection , the sync mark is chosen to have { HEAD ~ minimum correlation } with { TAIL ~ shifted versions } of the sync mark concatenated with the preamble field
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