TY  - CHAP
U1  - Konferenzveröffentlichung
A1  - Stern, Sebastian
A1  - Rohweder, Daniel
A1  - Freudenberger, Jürgen
A1  - Fischer, Robert F. H.
T1  - Binary multilevel coding over Eisenstein integers for MIMO broadcast transmission
T2  - 23rd International ITG Workshop on Smart Antennas (WSA 2019), April 24 - 26, 2019, Vienna, Austria
N2  - 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.
Y1  - 2019
UR  - https://ieeexplore.ieee.org/document/8727219
SN  - 978-3-8007-4939-3
SB  - 978-3-8007-4939-3
N1  - Volltextzugriff für Angehörige der Hochschule Konstanz via Datenbank IEEE Xplore möglich
SP  - 198
EP  - 205
PB  - VDE Verlag
CY  - Berlin ; Offenbach
ER  -