An FDMA method allows {HEAD ~ a number} of {TAIL ~ frequency channels} to be used within the various frequency bands 
of
An FDMA method allows { HEAD ~ a number } of { TAIL ~ frequency channels } to be used within the various frequency bands
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