Martin Mackenberg, M.Sc., BSEE
Since May 1st 2015 I am research associate at the faculty of electrical engineering and computer science at the University of Applied Sciences Lübeck. My research focus is wireless communication.
Born on July10th 1988
Higher education entrance qualification certificate 2008 Beruflichen Schule Bad Segeberg
Study Electrical Engineering 2009-2013
International student exchange program with two degrees
B.Sc. University of Applied Sciences Lübeck and
Bachelor of Science Electrical Engineering at Milwaukee School of Engineering
Student of Applied Information Technology (M.Sc.) September 2013 - April 2015 at University of Applied Sciences Lübeck
Since May 2015 research associate at the CoSA Center of Excellence
|||Reflection and transmission of ultra-wideband pulses for detection of vascular pressure variation and spatial resolution within soft tissues , In Biomedical Physics & Engineering Express, volume 2, 2016. [bib] [pdf] [abstract]|
Ultra-wideband signals have a variety of applications. An upcoming medical application is the detection of the heart rate of patients. However, current UWB systems provide poor resolution and are only able to detect vessels with a large diameter, e.g. the aorta. The detection and quantification of vascular dilation of thinner vessels is essential to develop wearable ultra-wideband based devices for real-time detection of cardiovascular conditions of the extremities. The reflection and transmission processes of those signals within inhomogeneous bodies are complex and their prediction is challenging. In this paper, we present an experimental setup (UWB system; phantom) for the detection of vascular dilation within soft tissues. Furthermore, we suggest a theoretical simulation model for the prediction of the reflection of ultra-wideband pulses and compare these simulated predictions to results of measurements within the phantom. The results verify that we are able to identify vascular dilation within the simulation model and the experimental setup, depending on the depth of the vessel (20 mm, 40 mm, 60 mm).
|||Entwicklung einer kompakten Sensorplattform für prototypischen Einsatz in der Medizintechnik , In ImpulsE (submitted), volume 20, 2015. [bib]|
|||Optical Underwater Distance Estimation , In Oceans MTS/IEEE, 2017. [bib] [abstract]|
Data communication with high data rate and precise underwater positioning with an accuracy of several centimeters is a problem. Precise positioning is important for autonomous operation and helps conserve energy which is important for many tasks. State-of-the-art acoustic communication faces difficulties underwater, e.g. multipath fading or variation of propagation speed. In this work, we propose optical distance estimation, which is the foundation for positioning. We combine the Beer-Lambert law and the inverse-square-law to model the channel of the medium. We investigate different wavelengths and employ curve fitting based on the Levenberg-Marquardt algorithm to determine the unknown coefficients of the model e.g. absorption. Our evaluation shows promising results and distance estimation of up to 25~m is possible. In stream water we determined the mean error for the optical distance estimation of 0.04m.
|||Wireless Underwater Communication via Analog OFDM Modulated Light , In Proceedings of the International Conference on Underwater Networks & Systems ACM, 2017. [bib] [pdf] [abstract]|
Short range wireless high data rate underwater communication systems become increasingly important. We provide the implementation, the setup and measurement results of the bit rate of our optical wireless underwater communication system in the Baltic Sea. In contrast to state of the art, our approach uses low frequency analog OFDM modulated light. This solution increases robustness, flexibility, and range. Furthermore, it decreases power requirements. Even with up to a 30 degree angular displacement of the transmitter the system works very well at a 6 m distance, and with a moderate power consumption of 7 W.
|||A Flexible and Modular Platform for Development of Short-range Underwater Communication , In Proceedings of the 11th ACM International Conference on Underwater Networks & Systems ACM, 2016. [bib] [pdf] [abstract]|
The development process of short-range underwater communication systems consists of different phases. Each phase comprises a multitude of specific requirements to the development platform. Typically, the utilized hardware and software is custom-built for each phase and wireless technology. Thus, the available platforms are usually not flexible and only usable for a single development phase or a single wireless technology. Furthermore, the modification and adaption between the phases and technologies are costly and time-consuming. Platforms providing the flexibility to switch between phases or even wireless technologies are either expensive or are not suitable to be integrated into underwater equipment. We developed a flexible and modular platform consisting of a controller and different front ends. The platform is capable of performing complex tasks during all development phases. To achieve high performance with more complex modulation schemes, we combine an embedded Linux processor with a field programmable gate array (FPGA) for computational demanding tasks. We show that our platform is capable of supporting the development of short-range underwater communication systems using a variety of wireless underwater communication technologies.
|||Simulation and Evaluation of an Optical Channel Model for Underwater Communication , In Proceedings of the International Conference on UnderWater Networks and Systems 2015, 2015. [bib] [abstract]|
Underwater communication gains increasing importance with rising need for autonomous underwater vehicles (AUV) and underwater infrastructure. Many applications require only a short range link up to a few meters, but high data rates up to several megabit per second. Optical communication is a promising solution for these applications. However, the performance of underwater optical communication is highly dependent on water conditions. Previous implementations rarely provide theoretical background on design decisions and rely on experimental results to verify range and data rates. We propose a model that enables an evaluation of range and signal strength dependent on the most important components of seawater. Furthermore, we implement a prototype based on simulation results and validate the model with measurement data.
|||Software Defined Transceiver for Underwater Communication , In Proceedings of the European Workshop on Testbed based Wireless Research, 2014. [bib] [abstract]|
New applications for autonomous underwater vehicles require underwater wireless communication with data rates up to several megabit per second and a transmission range up to several meter. Regular radio transceivers achieve a poor performance in seawater. Therefore, our project evaluates and implements new approaches for optical, acoustic and electric underwater communication. The goal is to implement a flexible software defined transceiver consisting of a FPGA with exchangeable communication modules.