TRANSMISSION DEVICE, TRANSMISSION METHOD, RECEPTION DEVICE, AND RECEPTION METHOD

摘要

An FEC coder in a transmission device according to an exemplary embodiment of the present disclosure performs BCH coding and LDPC coding based on whether a code length of the LDPC coding is a 16 k mode or a 64 k mode. A mapper performs mapping in an I-Q coordinate to perform conversion into an FEC block, and outputs pieces of mapping data (cells). The mapper defines different non-uniform mapping patterns with respect to different code lengths even an identical coding rate is used by the FEC coder. This configuration improves a shaping gain for different error correction code lengths in a transmission technology in which modulation of the non-uniform mapping pattern is used.

主权项

1. A transmission device comprising:
an error correction coder that performs error correction coding on each data block having a predetermined length to generate an error correction coded frame; and a mapper that maps the error correction coded frame to a symbol by a unit of a predetermined number of bits to generate an error correction coded block, wherein the mapper maps a first error correction coded frame having the first length and a second error correction coded frame having the second length in non-uniform patterns that are different from each other even if coding rates for the first error correction coded frame and the second error correction coded frame in the error correction coder are identical to each other.