{HEAD ~ an initial phase calculation unit} configured to calculate {TAIL ~ initial phase information} using a preamble and a postamble of a data packet applied thereto 
configured to calculate
{ HEAD ~ an initial phase calculation unit } configured to calculate { TAIL ~ initial phase information } using a preamble and a postamble of a data packet applied thereto
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH