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