PARALLEL IMPLEMENTATION FOR VITERBI-BASED DETECTION METHOD

摘要

The invention proposes a detection method for generating decisions corresponding to an input data sequence. The input data sequence is divided into overlapping blocks so as to provide a training region at the beginning of the blocks. Q consecutive blocks are processed in parallel by Q different Viterbi detection units. The decisions corresponding to the training region are discarded. And the remaining decisions are reordered to form a sequence of decisions.The training regions are used to initialise the path metric units and the backtracking array of the Viterbi detecting units.Additional Viterbi detecting units are needed to handle the overhead due to the overlaps.Applications: storage (optical storage systems such as CD, DVD, DVD+RW, Blu-ray; magnetic and magneto-optical storage systems), transmission systems (mobile, satellite).