DATA PROCESSING METHOD, PRECODING METHOD, AND COMMUNICATION DEVICE

摘要

An encoder outputs a first bit sequence having N bits. A mapper generates a first complex signal s1 and a second complex signal s2 with use of bit sequence having X+Y bits included in an input second bit sequence, where X indicates the number of bits used to generate the first complex signal s1, and Y indicates the number of bits used to generate the second complex signal s2. A bit length adjuster is provided after the encoder, and performs bit length adjustment on the first bit sequence such that the second bit sequence has a bit length that is a multiple of X+Y, and outputs the first bit sequence after the bit length adjustment as the second bit sequence. As a result, a problem between a codeword length of a block code and the number of bits necessary to perform mapping by a set of modulation schemes is solved.

主权项

1. A transmission device comprising:
an error correction encoder configured to generate a first encoded data sequence from an input data sequence using a first coding rate and a first code length, and generate a second encoded data sequence using a second coding rate and a second code length; a mapper configured to generate a first modulation symbol sequence by applying a first mapping pattern of a first modulation scheme to the first encoded data sequence, and generate a second modulation symbol sequence by applying a second mapping pattern of a second modulation scheme to the second encoded data sequence; and a transmitter configured to transmit the first modulation symbol sequence and the second modulation symbol sequence, wherein the mapper uses the first mapping pattern and the second mapping pattern that are different from each other for mapping, when (i) the first code length and the second code length are different from each other, (ii) the first modulation scheme and the second modulation scheme are the same in the number of transmission bits per symbol, and (iii) the first coding rate and the second coding rate are the same.