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