PARITY GENERATOR AND MAP APPARATUS FOR TURBO DECODING

摘要

PURPOSE: A parity generation apparatus for turbo decoding and a MAP apparatus are provided to improve decoding performance by increasing the amount of information for decoding with small quantity of calculation. CONSTITUTION: A first state matrix calculation part(110) obtains forward and reverse state matrices for an input symbol. A second state matrix calculation part(120) calculates forward and reverse state matrices for parity bits. An information calculation part(130) decodes information bits using the state matrices for the input symbol. A parity calculation part(140) decodes parity bits using the state matrix for the parity bits. The information calculation part and the parity calculation part use an LLR algorithm.