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Binary multilevel coding over Eisenstein integers for MIMO broadcast transmission

  • It is well known that signal constellations which are based on a hexagonal grid, so-called Eisenstein constellations, exhibit a performance gain over conventional QAM ones. This benefit is realized by a packing and shaping gain of the Eisenstein (hexagonal) integers in comparison to the Gaussian (complex) integers. Such constellations are especially relevant in transmission schemes that utilize lattice structures, e.g., in MIMO communications. However, for coded modulation, the straightforward approach is to combine Eisenstein constellations with ternary channel codes. In this paper, a multilevel-coding approach is proposed where encoding and multistage decoding can directly be performed with state-of-the-art binary channel codes. An associated mapping and a binary set partitioning are derived. The performance of the proposed approach is contrasted to classical multilevel coding over QAM constellations. To this end, both the single-user AWGN scenario and the (multiuser) MIMO broadcast scenario using lattice-reduction-aided preequalization are considered. Results obtained from numerical simulations with LDPC codes complement the theoretical aspects.

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Author:Sebastian SternORCiD, Daniel RohwederORCiD, Jürgen FreudenbergerORCiDGND, Robert F. H. FischerORCiD
Parent Title (English):23rd International ITG Workshop on Smart Antennas (WSA 2019), April 24 - 26, 2019, Vienna, Austria
Publisher:VDE Verlag
Place of publication:Berlin ; Offenbach
Document Type:Conference Proceeding
Year of Publication:2019
Release Date:2020/01/10
First Page:198
Last Page:205
Volltextzugriff für Angehörige der Hochschule Konstanz via Datenbank IEEE Xplore möglich
Institutes:Institut für Systemdynamik - ISD
Relevance:Keine peer reviewed Publikation (Wissenschaftlicher Artikel und Aufsatz, Proceeding, Artikel in Tagungsband)
Open Access?:Nein
Licence (German):License LogoUrheberrechtlich geschützt