COMMUNICATION APPARATUS AND COMMUNICATION METHOD

摘要

The communication apparatus comprises a turbo encoder. This turbo encoder includes a first recursive systematic convolutional encoder which convolutionally encodes two information bit sequences to output first redundant data, and a second recursive systematic convolutional encoder which convolutionally encodes the information bit sequences subjected to an interleave process to output second redundant data. The first and second recursive systematic convolutional encoders are encoders which search all connection patterns constituting the encoders and which satisfy optimum conditions that an interval between two bits '1' of a self-terminated pattern is maximum in a specific block length and that a total weight in the pattern having the maximum interval is maximum in the specific block length.