APPARATUS AND METHOD FOR CONTROLLING ITERATIVE DECODING FOR TURBO DECODER USING COMPARE OF LLR'S SIGN BIT

摘要

The invention using a signed comparison of the LLR, which can reduce decoding delay by the stop sign bit of the soft decision output of the turbo decoder is configured in series LLR comparison, by counting using a different amount of the sign bit after the predetermined iterative decoding iteration of the turbo decoder relates to a decoding apparatus and a control method. Iteration of the turbo decoder with a code comparing the LLR decoding control apparatus is of the soft decision value output from a turbo decoder, the soft decision value output means repeatedly decodes the turbo-coded data to output a soft decision value, the soft decision value output means comparing the sign to the count when the sign is different, or, if the iterative decoding count exceeds the maximum iterative decoding number is set, in accordance with the iterative decoding performed whether or not the repeated interruption control means and repeatedly stop control means for stopping the iterative decoding of the turbo decoder It includes a hard-decision value output means for outputting the result of hard decision decoding appointed an output value of the soft decision value output means.