In the method, {HEAD ~ the detector} detects {TAIL ~ an output signal} of the supply modulator 
detects
In the method , { HEAD ~ the detector } detects { TAIL ~ an output signal } of the supply modulator
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH