Experience

 
 
 
 
 

Team Lead - Research and Early Development

Intralogistics Industry

Nov 2022 – Present Dortmund, Germany
 
 
 
 
 

System Architect - Connectivity Units

Automotive Industry

Feb 2022 – Oct 2022 Bochum, Germany
 
 
 
 
 

Senior Researcher / Team Lead

TU Dortmund University
Communication Networks Institute (CNI)

Jun 2018 – Jan 2022 Dortmund, Germany
Organization / management of research projects, research grant acquisition
 
 
 
 
 

Researcher

TU Dortmund University
Communication Networks Institute (CNI)

Jun 2015 – May 2018 Dortmund, Germany
Working on several research projects, mentoring of students

Featured Publications

Johannes Friedrich, Janis Tiemann, Christian Wietfeld
In IPIN 2021

The high popularity of ultra-wideband technology for accurate indoor positioning in industrial and public spaces has led to a large amount of research in recent years. The focus has mostly been on localization accuracy in small-scale setups with a single localization zone. However, solutions designed for line-of-sight environments are not suitable for many large-scale applications. To overcome this lack of research, we propose novel concepts for precise wireless multi-hop clock synchronization and localization zone selection.
PDF Code Dataset Project Video IEEE Xplore
Janis Tiemann, Yehya Elmasry, Lucas Koring, Christian Wietfeld
In IEEE ICRA 2019

Overcoming a technology barrier by providing scalable, high accuracy, real-time localization through energy-efficient, scheduled time-difference of arrival channel access. We could show that simultaneous processing and provisioning of more than a thousand localization results per second with high reliability is possible using the proposed approach.
PDF Code Dataset Video IEEE Xplore
Janis Tiemann, Andrew Ramsey, Christian Wietfeld
In IEEE ICC CCNCPS

Augmenting and fusing state of the art ultra-wideband (UWB) localization with monocular simultaneous localization and mapping (SLAM) to enable autonomous flight in areas not covered by wireless localization.
PDF Dataset Video DOI IEEE Xplore

Recent Publications

This work provides the first experimental evaluation of the ranging performance in realistic environments and also assesses the …
PDF DOI Sensors

For many applications relative position information is critical. One particular case is the prevention of compressed air breathing …
PDF Video IEEE Xplore

This article proposes and evaluates the concept of combining multiple cellular networks for highly reliable communication with those …
PDF Dataset Video MDPI

Analyzing the interdependency of various system performance criteria, in particular multi-user scalability, real-time capability and …
DOI IEEE Xplore

The specific challenge addressed in this work is to analyze the proposed localization method under realistic conditions.
PDF Video DOI IEEE Xplore

Improving the accuracy and robustness of time-difference of arrival (TDOA) based ultra-wideband (UWB) localization systems. This is …
PDF Dataset DOI Sciencedirect

The specific challenge addressed in this paper is enabling novel applications with autonomous UAV systems through tight integration …
PDF Dataset Video DOI IEEE Xplore

The specific challenge addressed in this paper is the prediction of orientation induced ranging errors through channel response …
PDF Dataset DOI IEEE Xplore

This paper proposes and validates a novel approach for a multi-user time-difference of arrival based localization system using wireless …
PDF Code Dataset DOI IEEE Xplore

This paper proposes and validates a novel multi-user time-difference of arrival based localization approach using wireless clock …
PDF Code Dataset DOI IEEE Xplore

For efficient power transfer in wireless charging of electric vehicles scenarios, an accurate alignment of the coils of vehicle and …
PDF Dataset DOI IEEE Xplore

This paper discusses the design and evaluation of a practical and cooperative UWB positioning system using newly available integrated …
PDF DOI IEEE Xplore

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