Lars Thiele - IEEE Xplore Author Profile
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Lars Thiele

Also published under: L. Thiele

Publications
100
Citations
2,776
Publications by Year
20062024
Co-Authors:
Show All Co-Authors (150)
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Lars Thiele

Also published under: L. Thiele

Affiliation

Fraunhofer Heinrich Hertz Institute, Germany

Publication Topics

Biography

Lars Thiele received his M.S. degree in electrical engineering from Technische Universität Berlin in 2005. He joined Fraunhofer HHI in September 2005. In 2013 he received his Ph.D. degree from the Technical University of Munich. He has contributed to receiver and transmitter optimization under limited feedback, performance analysis for MIMO transmission in cellular OFDM systems, fair-resource allocation, and cooperative multi-point transmission under constrained channel state information at the transmitter.(Based on document published on 21 November 2014).
Publications
100
Citations
2,776
Publications by Year
20062024
Co-Authors:
Show All Co-Authors (150)
Author's Published Works

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Gradual Change Detection in Covariance Matrix: A Lazy Approach

Sida Dai;Ehsan Tohidi;Setareh Maghsudi;Lars Thiele;Slawomir Stanczak

2024 IEEE Wireless Communications and Networking Conference (WCNC)
Year: 2024 | Conference Paper |
Thanks to its slow-varying characteristic and relatively low requirement for estimation overhead, the covariance matrix has been extensively researched in sixth-generation (6G) wireless systems. Nevertheless, user mobility in practice will cause a gradual change in the covariance matrix, thereby deteriorating the system's performance if no update of the covariance matrix is applied. In this paper,...Show More

Gradual Change Detection in Covariance Matrix: A Lazy Approach

Sida Dai;Ehsan Tohidi;Setareh Maghsudi;Lars Thiele;Slawomir Stanczak

Year: 2024 | Conference Paper |

Co-Design of Tapering and Dielectric Loading for Minimizing the Scattering Cross Section of a Near-Field Measurement Probe

Enes Aksoy;Haroon Khan;Leszek Raschkowski;Lars Thiele;Slawomir Stanczak

2023 IEEE International Symposium On Antennas And Propagation (ISAP)
Year: 2023 | Conference Paper |
This paper investigates the antenna capabilities of a near-field measurement probe, such as the return loss (S11), radiation pattern and peak gain. For this purpose, a rectangular open ended waveguide (OEWG) is used, while minimizing its scattering cross section (SCS), to increase the accuracy of near-field measurements. In this context, the relation between tapering and dielectric loading of the ...Show More

Co-Design of Tapering and Dielectric Loading for Minimizing the Scattering Cross Section of a Near-Field Measurement Probe

Enes Aksoy;Haroon Khan;Leszek Raschkowski;Lars Thiele;Slawomir Stanczak

Year: 2023 | Conference Paper |

Complexity Reduction Techniques for a Frame Based Dynamic Ray Tracing Approach

Enes Aksoy;Haroon Khan;Leszek Raschkowski;Lars Thiele;Slawomir Stanczak

2023 53rd European Microwave Conference (EuMC)
Year: 2023 | Conference Paper |
Cited by: Papers (2)
Ray tracing is a simulation tool to determine propagation paths and create channels for communication applications. Mobile links or environments with moving objects, require several ray tracing simulations to create representative communication channels. This paper proposes a dynamic ray tracing approach, by utilizing a frame based technique, depicting scenarios with moving objects as sequential s...Show More

Complexity Reduction Techniques for a Frame Based Dynamic Ray Tracing Approach

Enes Aksoy;Haroon Khan;Leszek Raschkowski;Lars Thiele;Slawomir Stanczak

Year: 2023 | Conference Paper |

Ambiguity Subspace Resolution for Digital Twin Parameter Estimation

Wolfgang Zirwas;Brenda Vilas Boas;Lars Thiele

2023 IEEE International Conference on Communications Workshops (ICC Workshops)
Year: 2023 | Conference Paper |
In this work, we analyze the limits of parameter estimation of multipath components like their amplitude, delay and/or phase. Especially challenging is the estimation of such parameters when the multipath components have a low relative delay, i.e., less than half a tap delay with respect to the discrete channel impulse response. We will introduce the concept of the ambiguity subspace, which indica...Show More

Ambiguity Subspace Resolution for Digital Twin Parameter Estimation

Wolfgang Zirwas;Brenda Vilas Boas;Lars Thiele

Year: 2023 | Conference Paper |

Near-Optimal LOS and Orientation Aware Intelligent Reflecting Surface Placement

Ehsan Tohidi;Sven Haesloop;Lars Thiele;Slawomir Stańczak

ICC 2023 - IEEE International Conference on Communications
Year: 2023 | Conference Paper |
Cited by: Papers (12)
Due to their passive nature and thus low energy consumption, intelligent reflecting surfaces (IRSs) have shown promise as means of extending coverage as a proxy for connection reliability. The relative locations of the base station (BS), IRS, and user equipment (UE) determine the extent of the coverage that IRS provides which demonstrates the importance of IRS placement problem. More specifically,...Show More

Near-Optimal LOS and Orientation Aware Intelligent Reflecting Surface Placement

Ehsan Tohidi;Sven Haesloop;Lars Thiele;Slawomir Stańczak

Year: 2023 | Conference Paper |

Design and Optimization of a Near-Field Measurement Probe for a Minimized Scattering Cross Section

Enes Aksoy;Stuart Gregson;Clive Parini;Rostyslav Dubrovka;Robert Jones;Haroon Khan;Leszek Raschkowski;Lars Thiele;Slawomir Stanczak

2023 7th International Electromagnetic Compatibility Conference (EMC Turkiye)
Year: 2023 | Conference Paper |
Cited by: Papers (1)
This paper studies the relation between the mono-static scattering cross section (SCS) of a near-field measurement probe and its antenna capabilities, e.g. the return loss (S11), radiation pattern and peak gain. For this purpose, a highly parameterized model is created and several simulations are conducted with a rectangular open ended waveguide (OEWG), to assess the effects of polarization and ge...Show More

Design and Optimization of a Near-Field Measurement Probe for a Minimized Scattering Cross Section

Enes Aksoy;Stuart Gregson;Clive Parini;Rostyslav Dubrovka;Robert Jones;Haroon Khan;Leszek Raschkowski;Lars Thiele;Slawomir Stanczak

Year: 2023 | Conference Paper |

Required Orders of Interaction for Accurate Ray Tracing Simulations in mm-Wave Indoor Scenarios

Enes Aksoy;Haroon Khan;Yun Chen;Leszek Raschkowski;Lars Thiele;Slawomir Stanczak

2023 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (USNC-URSI)
Year: 2023 | Conference Paper |
Cited by: Papers (2)
This paper investigates the required amount of orders of interaction to obtain accurate ray tracing (RT) simulations for line-of-sight (LOS) and non-line-of-sight (NLOS) mmwave indoor scenarios. For this purpose, RT simulations with varying orders of interaction, from one to six, are analyzed and compared with previously conducted channel measurements of a kitchen scenario at 28 GHz. Most importan...Show More

Required Orders of Interaction for Accurate Ray Tracing Simulations in mm-Wave Indoor Scenarios

Enes Aksoy;Haroon Khan;Yun Chen;Leszek Raschkowski;Lars Thiele;Slawomir Stanczak

Year: 2023 | Conference Paper |

Analysis of Varying Car Geometry Accuracies for Ray Tracing Simulations in Urban V2V Scenarios

Enes Aksoy;Haroon Khan;Yun Chen;Leszek Raschkowski;Lars Thiele;Slawomir Stanczak

2023 17th European Conference on Antennas and Propagation (EuCAP)
Year: 2023 | Conference Paper |
Cited by: Papers (2)
Fifth Generation (5G) communications are envisioned to be an important part of future vehicle to vehicle (V2V) communications. Therefore, the characterization of V2V channels is a growing research area. Several different methods, such as ray tracing are used for the channel modeling. In this context, the geometries for the ray tracing simulations are key to obtain correct channel models. This pape...Show More

Analysis of Varying Car Geometry Accuracies for Ray Tracing Simulations in Urban V2V Scenarios

Enes Aksoy;Haroon Khan;Yun Chen;Leszek Raschkowski;Lars Thiele;Slawomir Stanczak

Year: 2023 | Conference Paper |

Accurate Vegetation Models with Low Computational Complexity for Ray Tracing

Enes Aksoy;Haroon Khan;Yun Chen;Leszek Raschkowski;Lars Thiele;Slawomir Stanczak

2023 International Microwave and Antenna Symposium (IMAS)
Year: 2023 | Conference Paper |
Cited by: Papers (2)
The frequency bands for communication standards are continuously increasing, as it can be seen from fifth generation (5G) and beyond 5G communications. This is done, to increase the capabilities of communication systems and enable new technologies, e.g. autonomous driving and wireless sensor networks. Therefore, reliable channel characterization methods, such as ray tracing, are needed to implemen...Show More

Accurate Vegetation Models with Low Computational Complexity for Ray Tracing

Enes Aksoy;Haroon Khan;Yun Chen;Leszek Raschkowski;Lars Thiele;Slawomir Stanczak

Year: 2023 | Conference Paper |

Ray-tracing in Urban Macro Campus Networks

Leszek Raschkowski;Stephan Jaeckel;Lars Thiele

2022 56th Asilomar Conference on Signals, Systems, and Computers
Year: 2022 | Conference Paper |
In this work, we demonstrate how a channel sounding campaign is recreated using a proprietary ray-tracing (RT) based radio propagation simulator and evaluate the simulation in terms of the achieved accuracy. In the 3.7 GHz campaign, we used a uniform cylindrical array (UCA) in an urban macro campus scenario in downtown Berlin to determine single directional channel impulse responses. Initial resul...Show More

Ray-tracing in Urban Macro Campus Networks

Leszek Raschkowski;Stephan Jaeckel;Lars Thiele

Year: 2022 | Conference Paper |

A Mobility-Aware Successive Feedback Scheme for 5G and Beyond Multi-User MIMO

Stephan Blankenstein;Peter Jung;Igor Bjelaković;Lars Thiele;Sławomir Stańczak

2022 56th Asilomar Conference on Signals, Systems, and Computers
Year: 2022 | Conference Paper |
To support gains in frequency division duplex multi-user multiple-input multiple-output scenarios, Channel State Information (CSI) is required at the Base Stations (BSs). For this purpose, Mobile Stations (MSs) report quantized CSI based on Grassmannian codebooks, that are common to MSs and BSs. Depending on the speed of the MSs, the channel changes over time and CSI must be performed frequently t...Show More

A Mobility-Aware Successive Feedback Scheme for 5G and Beyond Multi-User MIMO

Stephan Blankenstein;Peter Jung;Igor Bjelaković;Lars Thiele;Sławomir Stańczak

Year: 2022 | Conference Paper |

Reconfigurable Intelligent Surface Deployment in 5G and Beyond 5G Cellular Networks

Thomas Haustein;Jasmina McMenamy;Lars Thiele;Paul S. H. Leather

2022 IEEE 23rd International Workshop on Signal Processing Advances in Wireless Communication (SPAWC)
Year: 2022 | Conference Paper |
Cited by: Papers (6)
The successful deployment of Reconfigurable Intelligent Surface (RIS) technology in cellular networks is highly dependent on the availability of existing frameworks to enable the integration and operation of RIS panels in real-world propagation environments, preferably with low standardisation impact. This paper identifies the suitability of the existing 5G-NR frameworks for channel estimation, li...Show More

Reconfigurable Intelligent Surface Deployment in 5G and Beyond 5G Cellular Networks

Thomas Haustein;Jasmina McMenamy;Lars Thiele;Paul S. H. Leather

Year: 2022 | Conference Paper |

Deep Learning for Massive MIMO: Channel Completion for TDD Downlink

Sida Dai;Martin Kurras;Lars Thiele;Slawomir Stanczak;Litao Chen;Zhimeng Zhong

2021 IEEE 32nd Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)
Year: 2021 | Conference Paper |
In a realistic fifth generation (5G) massive multiple-input multiple-output (MIMO) system, hardware constraints often pose challenges towards network design that are not sufficiently considered in the literature. In this work, we consider a time division duplex (TDD) network where user equipments (UEs) are equipped with N> 1 antennas for receiving in the downlink (DL) but only with a single antenn...Show More

Deep Learning for Massive MIMO: Channel Completion for TDD Downlink

Sida Dai;Martin Kurras;Lars Thiele;Slawomir Stanczak;Litao Chen;Zhimeng Zhong

Year: 2021 | Conference Paper |

Review on Ray Tracing Channel Simulation Accuracy in Sub-6 GHz Outdoor Deployment Scenarios

Allan Wainaina Mbugua;Yun Chen;Leszek Raschkowski;Lars Thiele;Stephan Jaeckel;Wei Fan

IEEE Open Journal of Antennas and Propagation
Year: 2021 | Volume: 2 | Journal Article |
Cited by: Papers (28)
In this article, a review of the achieved accuracy in the literature for ray tracing (RT) based channel modeling is presented with a focus on outdoor propagation scenarios in the sub-6 GHz frequency range. The achieved accuracy is analyzed from three perspectives: 1) The input parameters which include the environmental description in the form of digital maps and the corresponding constitutive mate...Show More

Review on Ray Tracing Channel Simulation Accuracy in Sub-6 GHz Outdoor Deployment Scenarios

Allan Wainaina Mbugua;Yun Chen;Leszek Raschkowski;Lars Thiele;Stephan Jaeckel;Wei Fan

Year: 2021 | Volume: 2 | Journal Article |

Multi-User Massive MIMO Properties in Urban-Macro Channel Measurements

Lars Thiele;Sida Dai;Martin Kurras;Moritz Lossow;Leszek Raschkowski;Stephan Jaeckel

2019 53rd Asilomar Conference on Signals, Systems, and Computers
Year: 2019 | Conference Paper |
Cited by: Papers (2)
In this work we evaluate urban macro single input multiple output (SIMO) channel measurement performed at 3.7 GHz in Berlin city. In the evaluation we focus on spatial correlation of multi-user channels for varying user densities and distributions in line of sight (LOS) and non line of sight (NLOS) scenarios Therefore, we calculate the correlation matrices, i.e. the covariance matrix of the macro-...Show More

Multi-User Massive MIMO Properties in Urban-Macro Channel Measurements

Lars Thiele;Sida Dai;Martin Kurras;Moritz Lossow;Leszek Raschkowski;Stephan Jaeckel

Year: 2019 | Conference Paper |

Sparse Code-Domain Non-Orthogonal Random Access with Peeling Decoder

Johannes Dommel;Zoran Utkovski;Lars Thiele;Sławomir Stańczak

2019 53rd Asilomar Conference on Signals, Systems, and Computers
Year: 2019 | Conference Paper |
Cited by: Papers (3)
In this paper, we propose a modification of (general) sparse-coded non-orthogonal multiple access (NOMA) designs, amenable to receiver-side processing based on peeling decoding. We numerically evaluate the joint effects of sparse signature design and forward-error correction, and characterize the interplay between the system parameters such as signature sparsity, system load, and channel coding ra...Show More

Sparse Code-Domain Non-Orthogonal Random Access with Peeling Decoder

Johannes Dommel;Zoran Utkovski;Lars Thiele;Sławomir Stańczak

Year: 2019 | Conference Paper |

Industrial Indoor Measurements from 2-6 GHz for the 3GPP-NR and QuaDRiGa Channel Model

Stephan Jaeckel;Nick Turay;Leszek Raschkowski;Lars Thiele;Risto Vuohtoniemi;Marko Sonkki;Veikko Hovinen;Frank Burkhardt;Prasanth Karunakaran;Thomas Heyn

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall)
Year: 2019 | Conference Paper |
Cited by: Papers (32)
Providing reliable low latency wireless links for advanced manufacturing and processing systems is a vision of Industry 4.0. Developing, testing and rating requires accurate models of the radio propagation channel. The current 3rd generation partnership project (3GPP) new radio (NR) model as well as the quasi deterministic radio channel generator (QuaDRiGa) lack the propagation parameters for the ...Show More

Industrial Indoor Measurements from 2-6 GHz for the 3GPP-NR and QuaDRiGa Channel Model

Stephan Jaeckel;Nick Turay;Leszek Raschkowski;Lars Thiele;Risto Vuohtoniemi;Marko Sonkki;Veikko Hovinen;Frank Burkhardt;Prasanth Karunakaran;Thomas Heyn

Year: 2019 | Conference Paper |

A Spatially Consistent Geometric D2D Small-Scale Fading Model for Multiple Frequencies

Stephan Jaeckel;Leszek Raschkowski;Frank Burkhardt;Lars Thiele

2019 IEEE 90th Vehicular Technology Conference (VTC2019-Fall)
Year: 2019 | Conference Paper |
Cited by: Papers (2)
The 3rd generation partnership project (3GPP) new radio (NR) channel model introduced spatial consistency and a correlation model for multiple frequencies. Future extensions of this model will incorporate mobility at both ends of the link. These features are essential for many emerging wireless technologies in the 5G era. However, the existing small-scale-fading (SSF) model does not integrate thes...Show More

A Spatially Consistent Geometric D2D Small-Scale Fading Model for Multiple Frequencies

Stephan Jaeckel;Leszek Raschkowski;Frank Burkhardt;Lars Thiele

Year: 2019 | Conference Paper |

Evaluation of the Spatial Consistency Feature in the 3GPP Geometry-Based Stochastic Channel Model

Martin Kurras;Sida Dai;Stephan Jaeckel;Lars Thiele

2019 IEEE Wireless Communications and Networking Conference (WCNC)
Year: 2019 | Conference Paper |
Cited by: Papers (22)
Spatial consistency, meaning the spatial correlation of small scale fading, is a recently added feature in the geometry-based stochastic channel model used by 3rd Generation Partnership Project (3GPP) standardization. This feature is relevant for schemes that utilize channel correlation among users, e.g. clustering according to second order channel statistics. This paper provides a simulation base...Show More

Evaluation of the Spatial Consistency Feature in the 3GPP Geometry-Based Stochastic Channel Model

Martin Kurras;Sida Dai;Stephan Jaeckel;Lars Thiele

Year: 2019 | Conference Paper |

Efficient Sum-of-Sinusoids-Based Spatial Consistency for the 3GPP New-Radio Channel Model

Stephana Jaeckel;Leszek Raschkowski;Frank Burkhardt;Lars Thiele

2018 IEEE Globecom Workshops (GC Wkshps)
Year: 2018 | Conference Paper |
Cited by: Papers (21)
Spatial consistency was proposed in the 3GPP TR 38.901 channel model to ensure that closely spaced mobile terminals have similar channels. Future extensions of this model might incorporate mobility at both ends of the link. This requires that all stochastic processes in the model must be correlated in 3 (single-mobility) and up to 6 spatial dimensions (dual-mobility). Existing filtering methods ca...Show More

Efficient Sum-of-Sinusoids-Based Spatial Consistency for the 3GPP New-Radio Channel Model

Stephana Jaeckel;Leszek Raschkowski;Frank Burkhardt;Lars Thiele

Year: 2018 | Conference Paper |

Subcode-Based Early HARQ for 5G

Baris Goektepe;Stephan Faehse;Lars Thiele;Thomas Schierl;Cornelius Hellge

2018 IEEE International Conference on Communications Workshops (ICC Workshops)
Year: 2018 | Conference Paper |
Tactile Internet (TI) constitutes one of the major use cases for the development of the fifth generation (5G) mobile specification. TI services put high demand on the latency and reliability requirement, which is covered in the ultra-reliable low-latency communication (URLLC) discussion in 5G standardization. Hybrid Automatic Repeat Request (HARQ) is used in LTE to achieve high robustness in an ef...Show More

Subcode-Based Early HARQ for 5G

Baris Goektepe;Stephan Faehse;Lars Thiele;Thomas Schierl;Cornelius Hellge

Year: 2018 | Conference Paper |

Proof-of-concept of flexible massive MIMO beamforming at 2.4 GHz

Thomas Wirth;Matthias Mehlhose;Lars Thiele;Thomas Haustein

2017 51st Asilomar Conference on Signals, Systems, and Computers
Year: 2017 | Conference Paper |
Cited by: Papers (5)
The next wireless communication system will support flexible beamforming and beam-sweeping to realize high capacity demands. This can be achieved with Massive MIMO systems realizing high beamforming gains as well as higher order multi-user multiplexing. Real proof-of-concepts are required to evaluate algorithms and show performance gains. In general, prototyping of M-MIMO systems is challenging, s...Show More

Proof-of-concept of flexible massive MIMO beamforming at 2.4 GHz

Thomas Wirth;Matthias Mehlhose;Lars Thiele;Thomas Haustein

Year: 2017 | Conference Paper |

On Power Allocation and User Grouping for Sparse Coded Non-Orthogonal Multiple Access in the Downlink

Johannes Dommel;Stephan Faehse;Lars Thiele

2017 IEEE 86th Vehicular Technology Conference (VTC-Fall)
Year: 2017 | Conference Paper |
Sparse-spreading based non-orthogonal multiple access is considered to be a key component to support massive connectivity and increased capacity for future wireless communication systems. Since multiple users are co-scheduled on the same physical resources, power allocation cannot be optimized independently per user but also has to consider the assignment of resources between different users. This...Show More

On Power Allocation and User Grouping for Sparse Coded Non-Orthogonal Multiple Access in the Downlink

Johannes Dommel;Stephan Faehse;Lars Thiele

Year: 2017 | Conference Paper |

An Overview of Massive MIMO Technology Components in METIS

Gabor Fodor;Nandana Rajatheva;Wolfgang Zirwas;Lars Thiele;Martin Kurras;Kaifeng Guo;Antti Tolli;Jesper H. Sorensen;Elisabeth De Carvalho

IEEE Communications Magazine
Year: 2017 | Volume: 55, Issue: 6 | Magazine Article |
Cited by: Papers (24)
As the standardization of full-dimension MIMO systems in the Third Generation Partnership Project progresses, the research community has started to explore the potential of very large arrays as an enabler technology for meeting the requirements of fifth generation systems. Indeed, in its final deliverable, the European 5G project METIS identifies massive MIMO as a key 5G enabler and proposes speci...Show More

An Overview of Massive MIMO Technology Components in METIS

Gabor Fodor;Nandana Rajatheva;Wolfgang Zirwas;Lars Thiele;Martin Kurras;Kaifeng Guo;Antti Tolli;Jesper H. Sorensen;Elisabeth De Carvalho

Year: 2017 | Volume: 55, Issue: 6 | Magazine Article |

An Explicit Ground Reflection Model for mm-Wave Channels

Stephan Jaeckel;Leszek Raschkowski;Shangbin Wu;Lars Thiele;Wilhelm Keusgen

2017 IEEE Wireless Communications and Networking Conference Workshops (WCNCW)
Year: 2017 | Conference Paper |
Cited by: Papers (23)
5G mobile communication systems are likely to use the enormous bandwidths available at mm-wave frequencies. However, there is an important propagation effect that can have a major impact on the performance - the ground reflection (GR). This effect is currently not sufficiently covered by existing 3GPP propagation models. The GR causes fading both on the small-scale level, e.g., multi-path fading, ...Show More

An Explicit Ground Reflection Model for mm-Wave Channels

Stephan Jaeckel;Leszek Raschkowski;Shangbin Wu;Lars Thiele;Wilhelm Keusgen

Year: 2017 | Conference Paper |

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