METHOD AND APPARATUS FOR PRODUCING AND PROCESSING SEQUENCES OF MODULATION SYMBOLS

摘要

A sequence of modulation symbols defines at least two bit groups, including a first group of bits located in at least one first bit position within the symbols and a second group of bits located in at least one second bit positi on within the symbols and having a higher probability of transmission error tha n the bits of the first group. The coded information bits of a block are arranged to form a first sequence of bits in which each information bit is assigned to a respective one of the bit groups. The bits of the first sequence are then interleaved to form a second sequence of bits while preserving the assignmen t of the information bits to the bit groups. The bits of the second sequence a re finally mapped onto the sequence of modulation symbols.