LDPC Coded Modulations: Analysis and Design

Abstract

As discussed in the previous chapters, low-density parity-check (LDPC) coding is gaining increasing attention, from an implementation viewpoint, in the scientific community and the industry. In particular, since LDPC codes exhibit near-capacity performance on a variety of memoryless channels, there is high interest in investigating their performance on practical channels. A simple, although powerful, technique for exploiting LDPC codes over generic channels is based on the use of the LDPCcoded modulations, which represent the focus of this book. This approach is based on the concatenation of an LDPC encoder and a coded modulator (CM) characterized by “good” properties for transmission over the considered channel. This is the approach followed in [69], where an LDPC encoder is concatenated with a multiple-input multiple-output (MIMO) channel modulator.