METHOD AND APPARATUS FOR DECODING MULTI-LEVEL TRELLIS CODED MODULATION

摘要

PURPOSE: A decoding method and apparatus for multi-level trellis coded modulation are provided to improve the performance of a decoder through parallel processing of an add-compare-select part and to reduce the area of hardware using serial processing structure. CONSTITUTION: Among branches that are branched from the current state to the next state, branches having the next state are periodically divided using a common feature, and an add-compare-select part is processed in parallel based on the periodicity according to a code rate and constraint length, to improve the performance of a decoder. The parallel add-compare-select part is constructed in a manner that data from the add-compare-select part can be serially processed.