CODING AND MODULATION APPARATUS USING NON-UNIFORM CONSTELLATION AND DIFFERENT PHY MODES

摘要

A coding and modulation apparatus and method are presented, particularly for use in a system according to IEEE 802.11. The apparatus comprises an encoder configured to encode input data into cell words according to a low density parity check code, LDPC, and a modulator configured to modulate said cell words into constellation values of a non-uniform constellation and to assign bit combinations to constellation values of the used non-uniform constellation, wherein said modulator is configured to use, based on a modulation and coding scheme, MCS, index describing a single carrier, SC, mode, a total number of 64 constellation points, and the code rate, a particular non-uniform constellation.