Protograph bit-interleaved coded modulation: A bandwidth-efficient design paradigm for 6G wireless communications

Bit-interleaved coded modulation (BICM) has attracted considerable attention from the research community in past three decades, because it can achieve desirable error performance with relatively low implementation complexity for a large number of communication and storage systems. By exploiting iterative demapping decoding (ID), BICM is able to approach capacity limits over various channels. In recent years, protograph low-density parity-check (PLDPC) codes their spatially-coupled (SC) variants have emerged be pragmatic forward-error-correction (FEC) solution systems due tremendous error-correction capability simple structures, found widespread applications such as deep-space communication, satellite wireless optical data storage. This article offers comprehensive survey on state-of-the-art development PLDPC-BICM its innovative SC variety channel models, e.g., additive white Gaussian noise (AWGN) channels, fading Poisson pulse position (PPM) flash-memory Of particular interest code construction, constellation shaping, well bit-mapper design, where receiver formulated serially-concatenated framework consisting soft-decision demapper belief-propagation decoder. Finally, several promising directions are discussed, which not been adequately addressed current literature.