APPARATUS AND METHOD FOR MAPPING SYMBOL

摘要

The present invention provides a method and an apparatus for symbol mapping. The encoder, for example a systematic encoder, of the symbol mapping apparatus encodes transmission data (S410) and outputs data in which a plurality of redundancy bits are added to a plurality of information bits. A puncturer punctures the information bits and the redundancy bits (S420). An information interleaver interleaves the punctured information bits, and a redundancy interleaver interleaves the punctured redundancy bits (S430). Finally, the symbol mapper maps the interleaved information bits and the interleaved redundancy bits onto the symbols (S440). The average log-likelihood ratio (LLR) value of mapped information bits is different from the average LLR value of the mapped redundancy bits.