1. Institute for Digital Communications (IDC), Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany
2. Information, Learning and Physics Laboratory (IdePHICS), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
3. Department of Mathematics, Friedrich-Alexander-Universität (FAU) Erlangen-Nürnberg, Erlangen, Germany