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