TEMPORAL TMR VITERBI DECODER APPARATUS ENDURING SOFT ERROR

摘要

PURPOSE: A temporal TMR viterbi decoder device robust against a soft error is provided to rewrite data in a memory which is used in an operation, thereby coping with a soft error which occurs in the memory. CONSTITUTION: A BMC block(10) obtains a branch matrix value shifted from a current state to a next state using a hamming distance determining method. An ACS block(20) obtains a determination vector value and a small state of a branch matrix value of the BMC block with the smallest value by using a path matrix of a next state memorized in a path matrix memory. A trace back block(30) decodes final data. A memory for storing path matrix data and a memory for storing determination vector data rewrite data in a path matrix memory(20b) and a determination vector memory(30a) of the track back block and the ACS block.