Multilevel Codes in Lattice-Reduction-Aided Decision-Feedback Equalization
Robert F. H. Fischer, Sebastian Stern, Johannes B. Huber · Repository for Publications and Research Data (ETH Zurich) · 2020
The application of multilevel codes in lattice-reduction-aided (LRA) decision-feedback equalization (DFE) is discussed.There, integer linear combinations of the codewords in signal space have to be decoded.Since multilevel codes do not generate lattices in general and non-integer interference of not yet decoded users is present, straightforward decoding is not possible.A generalized version of multistage decoding adapted to LRA DFE is proposed.Thereby, multilevel constructions using stateof-the-art binary channel codes can be used, which makes coded LRA DFE schemes applicable in practice.The performance of the proposed structure is covered via numerical simulations.