{HEAD ~ The transceiver device} is programmed to monitor {TAIL ~ the spectrum} to determine if a portion of the spectrum is available 
is programmed to monitor
{ HEAD ~ The transceiver device } is programmed to monitor { TAIL ~ the spectrum } to determine if a portion of the spectrum is available
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH