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