Search Results for author: Stephan ten Brink

Found 27 papers, 7 papers with code

CRAP Part II: Clutter Removal with Continuous Acquisitions Under Phase Noise

no code implementations19 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.

Antenna Array Design for Mono-Static ISAC

no code implementations19 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.

Learning Radio Environments by Differentiable Ray Tracing

no code implementations30 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).

Multi-Target Localization in Multi-Static Integrated Sensing and Communication Deployments

no code implementations13 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.

CRAP: Clutter Removal with Acquisitions Under Phase Noise

no code implementations1 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.

Component Training of Turbo Autoencoders

no code implementations16 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.

Quantization

Deep Reinforcement Learning for mmWave Initial Beam Alignment

no code implementations17 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.

reinforcement-learning Reinforcement Learning (RL)

Optimizing Serially Concatenated Neural Codes with Classical Decoders

no code implementations20 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.

Decoder

Learning Quantization in LDPC Decoders

no code implementations10 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.

Quantization

Probabilistic 5G Indoor Positioning Proof of Concept with Outlier Rejection

1 code implementation18 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.

Position

Improving Triplet-Based Channel Charting on Distributed Massive MIMO Measurements

no code implementations20 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.

Dimensionality Reduction

Geometry-Based Phase and Time Synchronization for Multi-Antenna Channel Measurements

no code implementations13 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.

A Computationally Efficient 2D MUSIC Approach for 5G and 6G Sensing Networks

no code implementations30 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.

Automorphism Ensemble Decoding of Reed-Muller Codes

1 code implementation14 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

Iterative Detection and Decoding of Finite-Length Polar Codes in Gaussian Multiple Access Channels

no code implementations2 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

Massive MIMO Channel Measurements and Achievable Rates in a Residential Area

no code implementations21 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.

BIG-bench Machine Learning Position

Trainable Communication Systems: Concepts and Prototype

no code implementations29 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

Deep Learning-based Polar Code Design

no code implementations26 Sep 2019 Moustafa Ebada, Sebastian Cammerer, Ahmed Elkelesh, Stephan ten Brink

In this work, we introduce a deep learning-based polar code construction algorithm.

Decoder

Towards Practical Indoor Positioning Based on Massive MIMO Systems

no code implementations28 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.

On Recurrent Neural Networks for Sequence-based Processing in Communications

1 code implementation24 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.

Benchmarking Decoder

Decoder-in-the-Loop: Genetic Optimization-based LDPC Code Design

1 code implementation7 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

Decoder-tailored Polar Code Design Using the Genetic Algorithm

1 code implementation28 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.

Decoder Playing the Game of 2048

Genetic Algorithm-based Polar Code Construction for the AWGN Channel

1 code implementation19 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.

Playing the Game of 2048

Enabling FDD Massive MIMO through Deep Learning-based Channel Prediction

no code implementations8 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.

Deep Learning-Based Communication Over the Air

no code implementations11 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.

Transfer Learning

On Deep Learning-Based Channel Decoding

2 code implementations26 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

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