The transceiver determines {HEAD ~ what portion} of the spectrum is desired for {TAIL ~ data transmission} and then transmits the data transmission within a dynamically selected portion of the available spectrum 
is desired for
The transceiver determines { HEAD ~ what portion } of the spectrum is desired for { TAIL ~ data transmission } and then transmits the data transmission within a dynamically selected portion of the available spectrum
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH