In {HEAD ~ some exemplary embodiments}, normalized symbol estimates or MMSE symbol estimates are scaled to produce maximum likelihood estimates for {TAIL ~ decoding} 
In { HEAD ~ some exemplary embodiments } , normalized symbol estimates or MMSE symbol estimates are scaled to produce maximum likelihood estimates for { TAIL ~ decoding }
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL