Dominik Semmler

2 accepted papers

2025

Nonlinear Precoding in the RIS-Aided MIMO Broadcast Channel

Dominik Semmler, Michael Joham, Wolfgang Utschick

ICASSP 2025accepted

We propose to use Tomlinson-Harashima Precoding (THP) for the reconfigurable intelligent surface (RIS)-aided multiple-input multiple-output (MIMO) broadcast channel where we assume a line of sight (LOS) connection between the base station (BS) and the RIS. In this scenario, nonlinear precoding, like…

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2024

Data-Aided Channel Estimation Utilizing Gaussian Mixture Models

Franz Weißer, Nurettin Turan, Dominik Semmler, Wolfgang Utschick

ICASSP 2024accepted

In this work, we propose two methods that utilize data symbols in addition to pilot symbols for improved channel estimation quality in a multi-user system, so-called semi-blind channel estimation. To this end, a subspace is estimated based on all received symbols and utilized to improve the estimati…

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