A transceiver within {HEAD ~ the communication device} sweeps through {TAIL ~ a frequency range} of interest in order to receive signals within the frequency range 
A transceiver within { HEAD ~ the communication device } sweeps through { TAIL ~ a frequency range } of interest in order to receive signals within the frequency range
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH