an analysis circuit coupled to the radio receiver, the analysis circuit estimating {HEAD ~ a preselected characteristic} of {TAIL ~ the transmission channel}, and determining a preselected threshold 
of
an analysis circuit coupled to the radio receiver , the analysis circuit estimating { HEAD ~ a preselected characteristic } of { TAIL ~ the transmission channel } , and determining a preselected threshold
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH