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- short-paperDecember 2024
PIMSys: A Virtual Prototype for Processing in Memory
MEMSYS '24: Proceedings of the International Symposium on Memory SystemsPages 26–33https://doi.org/10.1145/3695794.3695797Data-driven applications are increasingly central to our information technology society, propelled by AI techniques reshaping various sectors of our economy. Despite their transformative potential, these applications demand immense data processing, ...
- research-articleApril 2024
Timing Analysis Beyond Complementary CMOS Logic Styles
ASPDAC '24: Proceedings of the 29th Asia and South Pacific Design Automation ConferencePages 189–194https://doi.org/10.1109/ASP-DAC58780.2024.10473842With scaling unabated, device density continues to increase, but power and thermal budgets prevent the full use of all available devices. This leads to the exploration of alternative circuit styles beyond traditional CMOS, especially dynamic data-...
- research-articleApril 2024
A Precise Measurement Platform for LPDDR4 Memories
MEMSYS '23: Proceedings of the International Symposium on Memory SystemsArticle No.: 17, Pages 1–8https://doi.org/10.1145/3631882.3631899LPDDR4, the most widely used low-power DRAM standard in the industry, plays a crucial role in modern system design. Understanding the non-functional properties of these DRAMs such as power consumption and reliability is essential for accurate system ...
- ArticleNovember 2023
From Algorithm to Implementation: Enabling High-Throughput CNN-Based Equalization on FPGA for Optical Communications
Embedded Computer Systems: Architectures, Modeling, and SimulationPages 158–173https://doi.org/10.1007/978-3-031-46077-7_11AbstractTo satisfy the growing throughput demand of data-intensive applications, the performance of optical communication systems increased dramatically in recent years. With higher throughput, more advanced equalizers are crucial, to compensate for ...
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- research-articleApril 2023
Automatic DRAM Subsystem Configuration with irace
RAPIDO '23: Proceedings of the DroneSE and RAPIDO: System Engineering for constrained embedded systemsPages 66–72https://doi.org/10.1145/3579170.3579259Nowadays, DRAM subsystem configuration includes a large number of parameters, resulting in an extensive design space. Setting these parameters is a challenging step in system design as the parameter-workload interactions are complex. Since design space ...
- ArticleJanuary 2023
Exploration of Thermoelectric Energy Harvesting for Secure, TLS-Based Industrial IoT Nodes
AbstractSecurity is one of the biggest challenges, particularly in the Industrial IoT and in critical infrastructures. Complex cryptographic computations are in contrast to the low energy budget of the devices, especially when independence from the power ...
- research-articleNovember 2022
Increasing Throughput of In-Memory DNN Accelerators by Flexible Layerwise DNN Approximation
Approximate computing and mixed-signal in-memory accelerators are promising paradigms to significantly reduce computational requirements of deep neural network (DNN) inference without accuracy loss. In this work, we present a novel in-memory design for ...
- research-articleOctober 2022
FELIX: A Ferroelectric FET Based Low Power Mixed-Signal In-Memory Architecture for DNN Acceleration
- Taha Soliman,
- Nellie Laleni,
- Tobias Kirchner,
- Franz Müller,
- Ashish Shrivastava,
- Thomas Kämpfe,
- Andre Guntoro,
- Norbert Wehn
ACM Transactions on Embedded Computing Systems (TECS), Volume 21, Issue 6Article No.: 84, Pages 1–25https://doi.org/10.1145/3529760Today, a large number of applications depend on deep neural networks (DNN) to process data and perform complicated tasks at restricted power and latency specifications. Therefore, processing-in-memory (PIM) platforms are actively explored as a promising ...
- short-paperSeptember 2023
Unveiling the Real Performance of LPDDR5 Memories
MEMSYS '22: Proceedings of the 2022 International Symposium on Memory SystemsArticle No.: 9, Pages 1–3https://doi.org/10.1145/3565053.3565062LPDDR5 is the latest low-power DRAM standard and expected to be used in various application fields. The vendors have published promising peak bandwidths up to 50 % higher than those of the predecessor LPDDR4. In this paper we evaluate the best-case and ...
- short-paperSeptember 2023
A Framework for Formal Verification of DRAM Controllers
MEMSYS '22: Proceedings of the 2022 International Symposium on Memory SystemsArticle No.: 6, Pages 1–7https://doi.org/10.1145/3565053.3565059The large number of recent JEDEC DRAM standard releases and their increasing feature set makes it difficult for designers to rapidly upgrade the memory controller IPs to each new standard. Especially hardware verification is challenging due to the higher ...
- demonstrationApril 2023
Smart Teaching Materials with Real-Time Augmented Reality Support for Introductory Physics Education
- Hamraz Javaheri,
- Frederik Lauer,
- Luisa Lauer,
- Kristin Altmeyer,
- Roland Brünken,
- Markus Peschel,
- Norbert Wehn,
- Paul Lukowicz
UbiComp/ISWC '22 Adjunct: Adjunct Proceedings of the 2022 ACM International Joint Conference on Pervasive and Ubiquitous Computing and the 2022 ACM International Symposium on Wearable ComputersPages 53–54https://doi.org/10.1145/3544793.3560322In this demonstration, we present a system design that helps to reduce the split attention effect in multimedia learning by providing an interactive environment with augmented reality support for elementary physics education. The system consists of ...
- ArticleJuly 2022
A Critical Assessment of DRAM-PIM Architectures - Trends, Challenges and Solutions
Embedded Computer Systems: Architectures, Modeling, and SimulationPages 362–379https://doi.org/10.1007/978-3-031-15074-6_23AbstractRecently, we are witnessing a surge in DRAM-based Processing in Memory (PIM) publications from academia and industry. The architectures and design techniques proposed in these publications vary largely, ranging from integration of computation ...
- research-articleApril 2022
DRAMSys4.0: An Open-Source Simulation Framework for In-depth DRAM Analyses
International Journal of Parallel Programming (IJPP), Volume 50, Issue 2Pages 217–242https://doi.org/10.1007/s10766-022-00727-4AbstractThe simulation of Dynamic Random Access Memories (DRAMs) on system level requires highly accurate models due to their complex timing and power behavior. However, conventional cycle-accurate DRAM subsystem models often become a bottleneck for the ...
- research-articleMay 2022
Revisiting pass-transistor logic styles in a 12nm FinFET technology node
DATE '22: Proceedings of the 2022 Conference & Exhibition on Design, Automation & Test in EuropePages 1083–1084With the slow-down of Moore's law and the increasing requirements on energy efficiency, alternative logic styles compared to complementary static CMOS have to be revisited for digital circuit implementations. Pass Transistor Logic (PTL) gained much ...
- posterFebruary 2022
FPGA-based Trainable Autoencoder for Communication Systems
- Jonas Ney,
- Sebastian Dörner,
- Matthias Herrmann,
- Mohammad Hassani Sadi,
- Jannis Clausius,
- Stephan ten Brink,
- Norbert Wehn
FPGA '22: Proceedings of the 2022 ACM/SIGDA International Symposium on Field-Programmable Gate ArraysPage 154https://doi.org/10.1145/3490422.3502337In communication systems, autoencoder refers to a system that replaces parts of the traditional transmitter and receiver of the baseband processing chain with artificial neural networks (ANNs). This allows to jointly train the system for an underlying ...
- research-articleNovember 2021
When Massive GPU Parallelism Ain’t Enough: A Novel Hardware Architecture of 2D-LSTM Neural Network
ACM Transactions on Reconfigurable Technology and Systems (TRETS), Volume 15, Issue 1Article No.: 2, Pages 1–35https://doi.org/10.1145/3469661Multidimensional Long Short-Term Memory (MD-LSTM) neural network is an extension of one-dimensional LSTM for data with more than one dimension. MD-LSTM achieves state-of-the-art results in various applications, including handwritten text recognition, ...
- short-paperMay 2022
An LPDDR4 Safety Model for Automotive Applications
MEMSYS '21: Proceedings of the International Symposium on Memory SystemsArticle No.: 12, Pages 1–9https://doi.org/10.1145/3488423.3519333The increasing demand for DRAM in modern vehicles creates new challenges for automobile manufacturers. To allow DRAM subsystems to be used in safety-critical tasks like autonomous driving, a special Automotive Safety Integrity Level (ASIL) grading ...