Fraunhofer-Publica
The Fraunhofer-Publica has been successfully documenting the research results of the Fraunhofer-Gesellschaft for over 30 years. The platform enables the collaborative linking of research-relevant objects and disseminates within the international scientific community.
The Fraunhofer-Publica thus fulfils its responsibility to promote the transfer of knowledge and know-how to industry and society.
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Research outputs
As an application-oriented research organisation, Fraunhofer aims to conduct highly innovative and solution-oriented research - for the benefit of society and to strengthen the German and European economy.
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Projects
Fraunhofer is tackling the current challenges facing industry head on. By pooling their expertise and involving industrial partners at an early stage, the Fraunhofer Institutes involved in the projects aim to turn original scientific ideas into marketable products as quickly as possible.
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Researchers
Scientific achievement and practical relevance are not opposites - at Fraunhofer they are mutually dependent. Thanks to the close organisational links between Fraunhofer Institutes and universities, science at Fraunhofer is conducted at an internationally first-class level.
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Institutes
The Fraunhofer-Gesellschaft is the leading organisation for applied research in Europe. Institutes and research facilities work under its umbrella at various locations throughout Germany.
Recent Additions
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PublicationA Tutorial on Downlink Precoder Selection Strategies for 3GPP MIMO Codebooks( 2023)This paper deals with the evolution of downlink codebook based multiple-input multiple-output (MIMO) within the third generation partnership project (3GPP) through release 15 to 17. There exist already several tutorials on this topic. However, to the authors' knowledge, the comparison in terms of complexity performance trade-off between practical precoder selection strategies in frequency or delay domain has not been tackled so far in the literature. This paper describes with matrix formalism the two main codebook types specified within 3GPP, i.e., Type-I codebook (low resolution) and Type-II codebook (high resolution). The Rel. 17 port selection is also detailed as well as the multi-user MIMO (MU-MIMO) precoding strategy to be applied relying on Type-II codebook feedback. For the enhanced Type-II codebook, two main practical precoder selection strategies are detailed at the UE side (i) based on singular value decomposition per sub-band in the frequency domain, (ii) based on wideband singular decomposition in the delay domain. Monte Carlo simulations demonstrate that the delay domain strategy performance may suffer from spatial interference for single user MIMO high rank transmissions when the channel is both spatially correlated and frequency selective. On the other hand, the frequency domain strategy complexity increases linearly with the number of sub-bands while it is not the case for the delay domain selection strategy. As a result, the delay domain selection strategy is particularly relevant for Rel. 17 Type-II codebook port selection or for a low frequency selective channel with few significant consecutive delays.
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PublicationBlueprint of the Common European Energy Data Space( 2024-03)This document addresses the concept of a Common European Energy Data Space (CEEDS), providing detailed approaches and recommendations for its real-world realization. In particular, the main objective of this blueprint is to guide on enhancing the existing data infrastructures, in the energy domain, towards the full embracement of data space solutions. Bridging this gap will empower the introduction of novel energy services, which will increase the efficiency and reliability of the energy systems while providing substantial benefits for every stakeholder. The key scope of this document is to present (i) a framework for new economically feasible business use cases and (ii) the general data space architecture that can enable them. This architecture aims to interconnect the existing data infrastructures, of legacy systems, with federated data spaces; at this scope, technical specifications have been included.
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PublicationAdditive Manufacturing enabling advanced tool, die and mold making. Market and technology report 2022(Fraunhofer IPK, 2024)This international market and technology report is part of the activities of Fraunhofer IPK within FERA and presents a state of the art assessment regarding the adoption of Additive Manufacturing in industrial applications for tools, dies molds in Brazil and Germany.
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PublicationSelf-localization of roadside radar unit based on vehicle trajectory( 2024-04-16)Roadside sensor unit plays an important role in the Intelligent transportation system (ITS). Millimeter wave (mmWave) radar has become one of the most popular sensors in roadside units, due to its unique advantage of long-range detection and stability in all weather, etc. A key step before further traffic analysis or data communication in ITS is the localization of the radar sensor. The localization task for the mobile sensor units is more important, as it is necessary every time it is deployed. In this thesis, a map-based data processing pipeline is presented and implemented to estimate both the position and orientation of roadside radar in a world coordinate. It solves the localization task by matching two representations of roads. A street map is one of them. It could provide topological information on lanes. Turning behavior is the attribute that this thesis focuses on. By utilizing a street map, it is possible to extract road points from aerial laser scans and assign labels to these points. Besides, the pipeline uses the internal measurements obtained from the sensor. Moving objects detected can be considered as the existence of roads. With a sufficient duration of sampling, these moving objects can reach any accessible point in the field of view of the sensor. The second road representation is then extracted. Tracking moving objects helps to learn the turning behavior of each trajectory, and to assign labels to radar measurement points. Point cloud registration is applied to find the transformation matrix between the above two point sets. Semantic information is introduced in this step to calculate the weights of point pairs, enhancing the robustness. The performance of the pipeline is evaluated in both simulator and real-world experiments. The results indicate that labeling point clouds based on the results of object tracking is reliable. The proposed method can achieve positional accuracy below 1 meter and angular accuracy below 0.5 degrees. Compared to methods that do not use semantic information, there is an improvement in the result.
Most viewed
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PublicationBarkhausen-Effect and Eddy Current Testing for the Characterization of the Microstructure and Residual Stress States with Local Resolution( 1997)The IZFP has developed a microscope based on micromagnetic and eddy-current techniques. By using miniaturized inductive transducers with some tenths of a µm slit width, speciments are scanned in down to one µm increments. Concering the micromagnetic techniques, the magnetic Barkhausen noise is measured, which is mainly sensitive to microstructure and residual stress states. The applied eddy-current technqiue is sensitive to microscopic defects, local changes in permeability and conductivity.
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PublicationComputer-aided cutting-edge research on history for home edutainment and exploratory learning( 2012)Webbles are the most recent form of IntelligentPad. Webbles are objects in a browser window that allow for direct manipulation by drag and drop. One may pick up any Webble and move it over any other one for operational combination. The new Webble is plugged into the previous one and data between them flow through predefined slots. Human users may freely reconfigure the slot connections of Webbles as necessary. Within the authors' adaptive interactive dynamic atlas project, historians have the historical data literally at their fingertips. Historical data have some visual appearance on the screen and may be directly manipulated by actions such as drag and drop. The professional research interface is accessible via any Web browser and, thus, allows for participation of a wide audience. Contemporary technologies are bringing science to private homes where families may playfully explore history in manifold ways.
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