DECODING APPARATUS, AND DECODING METHOD INCLUDING PROCESSING ITERATIONS WHICH INCLUDES THE FIRS AND SECOND MZ-LOG-MAP DECODING OPERATIONS

摘要

PURPOSE: A decoding apparatus and a decoding method are provided to improve performance by maintaining low complexity and insensitivity to input scaling. CONSTITUTION: A decoding method includes processing iterations. In each processing iteration, the first Max-Log-MAP decoding operation is performed to generate a systematic error due to Max-Log approximation. The first weighting operation is performed to apply weights to extrinsic information from the first decoding operation to be applied as priori information to a second Max-Log-MAP decoding operation. The second Max-Log-MAP decoding operation is performed to generate a systematic error due to the Max-Log approximation. The second weighting operation is performed to apply weights to extrinsic information from the second decoding operation to be applied as priori information to the first Max-Log-MAP decoding of the next iteration. Each weighting operation is performed to compensate for the systematic error caused by the Max-Log approximation made in the previous Max-Log-MAP decoding operation.