no code implementations • 19 Feb 2024 • Marcus Henninger, Silvio Mandelli, Artjom Grudnitsky, Stephan ten Brink
The mitigation of clutter is an important research branch in Integrated Sensing and Communication (ISAC), one of the emerging technologies of future cellular networks.
no code implementations • 19 Feb 2024 • Alexander Felix, Silvio Mandelli, Marcus Henninger, Stephan ten Brink
In this work, we propose a model to evaluate the angular capabilities of a mono-static setup, constrained to the shape of the communications array and its topology requirements in wireless networks.
no code implementations • 30 Nov 2023 • Jakob Hoydis, Fayçal Aït Aoudia, Sebastian Cammerer, Florian Euchner, Merlin Nimier-David, Stephan ten Brink, Alexander Keller
Ray tracing (RT) is instrumental in 6G research in order to generate spatially-consistent and environment-specific channel impulse responses (CIRs).
no code implementations • 13 Jun 2023 • Maximilian Bauhofer, Silvio Mandelli, Marcus Henninger, Thorsten Wild, Stephan ten Brink
In contrast, in this work we propose an ensemble of techniques for processing the information gathered from multiple sensing nodes, jointly observing an environment with multiple targets.
no code implementations • 1 Jun 2023 • Marcus Henninger, Silvio Mandelli, Artjom Grudnitsky, Thorsten Wild, Stephan ten Brink
One of those is clutter removal, which should be applied to remove the influence of unwanted components, scattered by the environment, in the acquired sensing signal.
no code implementations • 16 May 2023 • Jannis Clausius, Marvin Geiselhart, Stephan ten Brink
In this paper we extend the component training to structures with an inner and outer autoencoder, where we propose a new 1-bit quantization strategy for the encoder outputs based on the underlying communication problem.
no code implementations • 12 Apr 2023 • Sebastian Jung, Tim Uhlemann, Alexander Span, Maximilian Bauhofer, Stephan ten Brink
Higher-order solitons inherently possess a spatial periodicity along the propagation axis.
no code implementations • 17 Feb 2023 • Daniel Tandler, Sebastian Dörner, Marc Gauger, Stephan ten Brink
We investigate the applicability of deep reinforcement learning algorithms to the adaptive initial access beam alignment problem for mmWave communications using the state-of-the-art proximal policy optimization algorithm as an example.
no code implementations • 20 Dec 2022 • Jannis Clausius, Marvin Geiselhart, Stephan ten Brink
For improving short-length codes, we demonstrate that classic decoders can also be used with real-valued, neural encoders, i. e., deep-learning based codeword sequence generators.
no code implementations • 10 Aug 2022 • Marvin Geiselhart, Ahmed Elkelesh, Jannis Clausius, Fei Liang, Wen Xu, Jing Liang, Stephan ten Brink
Finding optimal message quantization is a key requirement for low complexity belief propagation (BP) decoding.
1 code implementation • 18 Jul 2022 • Marcus Henninger, Traian E. Abrudan, Silvio Mandelli, Maximilian Arnold, Stephan Saur, Veli-Matti Kolmonen, Siegfried Klein, Thomas Schlitter, Stephan ten Brink
In this work, we introduce an iterative positioning method that reweights the time of arrival (ToA) and angle of arrival (AoA) measurements originating from multiple locators in order to efficiently remove outliers.
no code implementations • 20 Jun 2022 • Florian Euchner, Phillip Stephan, Marc Gauger, Sebastian Dörner, Stephan ten Brink
The objective of channel charting is to learn a virtual map of the radio environment from high-dimensional CSI that is acquired by a multi-antenna wireless system.
no code implementations • 13 Jun 2022 • Florian Euchner, Phillip Stephan, Marc Gauger, Stephan ten Brink
Synchronization of transceiver chains is a major challenge in the practical realization of massive MIMO and especially distributed massive MIMO.
no code implementations • 30 Apr 2021 • Marcus Henninger, Silvio Mandelli, Maximilian Arnold, Stephan ten Brink
Future cellular networks are intended to have the ability to sense the environment by utilizing reflections of transmitted signals.
1 code implementation • 14 Dec 2020 • Marvin Geiselhart, Ahmed Elkelesh, Moustafa Ebada, Sebastian Cammerer, Stephan ten Brink
Reed-Muller (RM) codes are known for their good maximum likelihood (ML) performance in the short block-length regime.
Information Theory Information Theory
no code implementations • 2 Dec 2020 • Moustafa Ebada, Sebastian Cammerer, Ahmed Elkelesh, Marvin Geiselhart, Stephan ten Brink
We consider the usage of finite-length polar codes for the Gaussian multiple access channel (GMAC) with a finite number of users.
Information Theory Information Theory
no code implementations • 21 Feb 2020 • Marc Gauger, Maximilian Arnold, Stephan ten Brink
In this paper we present a measurement set-up for massive MIMO channel sounding that shows very good long-term phase stability.
no code implementations • 29 Nov 2019 • Sebastian Cammerer, Fayçal Ait Aoudia, Sebastian Dörner, Maximilian Stark, Jakob Hoydis, Stephan ten Brink
We consider a trainable point-to-point communication system, where both transmitter and receiver are implemented as neural networks (NNs), and demonstrate that training on the bit-wise mutual information (BMI) allows seamless integration with practical bit-metric decoding (BMD) receivers, as well as joint optimization of constellation shaping and labeling.
Information Theory Signal Processing Information Theory
no code implementations • 26 Sep 2019 • Moustafa Ebada, Sebastian Cammerer, Ahmed Elkelesh, Stephan ten Brink
In this work, we introduce a deep learning-based polar code construction algorithm.
no code implementations • 28 May 2019 • Mark Widmaier, Maximilian Arnold, Sebastian Dörner, Sebastian Cammerer, Stephan ten Brink
We showcase the practicability of an indoor positioning system (IPS) solely based on Neural Networks (NNs) and the channel state information (CSI) of a (Massive) multiple-input multiple-output (MIMO) communication system, i. e., only build on the basis of data that is already existent in today's systems.
1 code implementation • 24 May 2019 • Daniel Tandler, Sebastian Dörner, Sebastian Cammerer, Stephan ten Brink
In this work, we analyze the capabilities and practical limitations of neural networks (NNs) for sequence-based signal processing which can be seen as an omnipresent property in almost any modern communication systems.
1 code implementation • 7 Mar 2019 • Ahmed Elkelesh, Moustafa Ebada, Sebastian Cammerer, Laurent Schmalen, Stephan ten Brink
Moreover, GenAlg can be used to design LDPC codes with the aim of reducing decoding latency and complexity, leading to coding gains of up to $0. 325$ dB and $0. 8$ dB at BLER of $10^{-5}$ for both AWGN and Rayleigh fading channels, respectively, when compared to state-of-the-art short LDPC codes.
Information Theory Information Theory
1 code implementation • 28 Jan 2019 • Ahmed Elkelesh, Moustafa Ebada, Sebastian Cammerer, Stephan ten Brink
We propose a new framework for constructing polar codes (i. e., selecting the frozen bit positions) for arbitrary channels, and tailored to a given decoding algorithm, rather than based on the (not necessarily optimal) assumption of successive cancellation (SC) decoding.
1 code implementation • 19 Jan 2019 • Ahmed Elkelesh, Moustafa Ebada, Sebastian Cammerer, Stephan ten Brink
We propose a new polar code construction framework (i. e., selecting the frozen bit positions) for the additive white Gaussian noise (AWGN) channel, tailored to a given decoding algorithm, rather than based on the (not necessarily optimal) assumption of successive cancellation (SC) decoding.
no code implementations • 8 Jan 2019 • Maximilian Arnold, Sebastian Dörner, Sebastian Cammerer, Sarah Yan, Jakob Hoydis, Stephan ten Brink
A major obstacle for widespread deployment of frequency division duplex (FDD)-based Massive multiple-input multiple-output (MIMO) communications is the large signaling overhead for reporting full downlink (DL) channel state information (CSI) back to the basestation (BS), in order to enable closed-loop precoding.
no code implementations • 11 Jul 2017 • Sebastian Dörner, Sebastian Cammerer, Jakob Hoydis, Stephan ten Brink
End-to-end learning of communications systems is a fascinating novel concept that has so far only been validated by simulations for block-based transmissions.
2 code implementations • 26 Jan 2017 • Tobias Gruber, Sebastian Cammerer, Jakob Hoydis, Stephan ten Brink
We revisit the idea of using deep neural networks for one-shot decoding of random and structured codes, such as polar codes.
Information Theory Information Theory