{HEAD ~ A message update function} specifically defined as part of the invention, is used to determine {TAIL ~ the outgoing message} at the variable node, and the simple min operation along with modulo 2 sum of signs is used at the check node 
is used to determine
{ HEAD ~ A message update function } specifically defined as part of the invention , is used to determine { TAIL ~ the outgoing message } at the variable node , and the simple min operation along with modulo 2 sum of signs is used at the check node
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH