In mobile radio receivers, the transmission power must be raised before {HEAD ~ the start} of {TAIL ~ the transmission process}, and must be reduced again after the end of the transmission process 
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In mobile radio receivers , the transmission power must be raised before { HEAD ~ the start } of { TAIL ~ the transmission process } , and must be reduced again after the end of the transmission process
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH