METHOD AND AN APPARATUS FOR DECODING A MAP, CAPABLE OF OUTPUTTING DECODING DATA BY REGULATING THE BIT-WIDTH OF METRIC DATA, AND A TURBO-MAP DECODER USING THE SAME

摘要

PURPOSE: A method and an apparatus for decoding a map, and a turbo-map decoder using the same are provided to easily process a desired data part for a decoding process by regulating the bit-width of operational data based on the modulating method of input data, when data, which is inputted in a turbo decoder from a demodulator, is decodes.;CONSTITUTION: A first metric operational unit(401) calculates first metric data from input data. A first bit-width regulator(403), according to the modulating method of the input data, adjusts the bit-width of the data outputted from the first metric operational unit. A second metric operational unit calculates second metric data using the first metric data with the regulated bit-width. A log likelyhood ratio(LLR) operational unit(413) calculates LLR data using the second metric data. A second bit-width regulator(415) outputs a decoded data by reregulating the bit-width of the LLR data.;COPYRIGHT KIPO 2010