Low density parity check code word decoding method for communication apparatus, involves determining messages, from variable node to control node, relative to set of symbols such that minimal value is null

摘要

The method involves initiating a message from a variable node by information representing a ratio between the probability to have a most probable symbol at a position corresponding to the node and the probability to have a current symbol at the position. A message, from a control node to a determined variable node, relative to a determined symbol is determined as a minimal value taken by maximal value of messages received from the variable node. Messages, from the variable node to the control node, relative to a set of symbols are determined such that the minimal value is null.