Publications 2017

Script list Publications

(1) Efficient and Low-Complexity Space Time Code for Massive MIMO RFID Systems
M. Abouzeid, L. Lopacinski, E. Grass, T. Kaiser, R. Kraemer
Proc. IEEE Iberian Conference on Information Systems and Technologies (CISTI 2017), 2158 (2017)
In this paper, a Space-Time Block Code (STBC) based on the Golden number, Golden code is proposed for a massive MIMO-RFID systems. Based on channel modelling for massive MIMO-RFID system, the proposed space-time code is applied to the tag side. Simulation results show that the proposed code for massive MIMO-RFID systems outperforms Alamouti code while simplifying the receiver's complexity. The Bit Error Rate (BER) performance of the proposed technique demonstrates that high diversity gain for the tag is achieved leading to a highly reliable and more robust RFID range. Furthermore, the link capacity between the tagged item and the reader can be increased. The proposed RFID technique provides superior performance against the state-of-the-art RFID techniques.

(2) A Novel Beamforming Algorithm for Massive MIMO Chipless RFID Systems
M. Abouzeid, F. Zheng, J. Gutierrez Teran, T. Kaiser, R. Kraemer
Proc. Wireless Telecommunications Symposium (WTS 2017), (2017)
This paper discusses the idea of merging massive
Multiple Input Multiple Output (mMIMO) technology
into backscatter radio communication systems. Specifically, we
consider a passive - battery-less - Radio Frequency IDentification
(RFID) system. The paper provides a mathematical framework
for channel modelling of mMIMO-RFID system including the
effect of large scale fading on the communication process.
Furthermore, a novel beamforming scheme will be proposed
which enhances the overall mMIMO-RFID system detection
capability in terms of bit error rate over different interrogator
ranges. The proposed idea would shift the complexity and
cost to the reader side while simplifying the tag. The overall
mMIMO-RFID system performance is investigated considering
the case of multiple tags; each of them is equipped with a single
antenna, in the interrogation zone of mMIMO based reader.

(3) Efficient and Low-Complexity Joint Beamforming Algorithm for Industrial Environments: Measurement-Based Evaluation
M. Abouzeid, J. Gutierrez Teran, E. Grass, R. Kraemer
Proc. 9th IEEE Computer Science and Electronic Engineering Conference (CEEC 2017), (2017)
In this paper, efficient and low-complexity joint
beamforming algorithm is proposed for industrial environments.
In addition, a configuration of distributed antenna system
(DAS) is proposed for a smart factory. The proposed joint
beamforming algorithm in conjunction with the proposed
configuration is compared with the conventional and state-ofthe-
art beamforming techniques in industrial communication.
Simulation results show that the proposed algorithm outperforms
the conventional beamforming algorithms while simplifying the
receiver’s complexity. The Bit Error Rate (BER) performance
of the proposed algorithm demonstrates that the coordination of
the interference is achieved leading to a high reliable and more
robust wireless communication. The proposed joint beamforming
algorithm provides superior performance against the state-ofthe-
art joint beamforming techniques in industrial environments.

(4) Design of an On-Chip System for the SET Pulse Width Measurement
M. Andjelkovic, V. Petrovic, M. Nenadovic, A. Breitenreiter, M. Krstic, R. Kraemer
Proc. EUROMICRO Conference on Digital Systems Design (DSD 2017), 111 (2017)

(5) Erstellung eines Modells der Kritischen Ladung zur Bewertung der Robustheit gegenüber SETs und SEUs: Fallstudie Muller C-Element
M. Andjelkovic, M. Krstic, R. Kraemer, V.S. Veeravalli, A. Steininger
Proc. 9. ITG/GMM/GI-Fachtagung Zuverlässigkeit und Entwurf (ZuE 2017), 17 (2017)

(6) Entwurf eines On-Chip-Systems für die Messung der Breite von SET-Pulsen
M. Andjelkovic, V. Petrovic, M. Nenadovic, G. Schoof, M. Krstic
Proc. ITG/GI/GMM-Workshop Testmethoden und Zuverlässigkeit von Schaltungen und Systemen (TuZ 2017), 49 (2017)

(7) 2D TCAD Simulation of Single Event Transients in 250 nm Bulk CMOS Technology
M. Andjelkovic, U. Jagdhold, M. Krstic, R. Kraemer
Proc. 9. ITG/GMM/GI-Fachtagung Zuverlässigkeit und Entwurf (ZuE 2017), 90 (2017)

(8) Optimization of the Methodology for the Circuit-Level Characterization of Single Event Transients
M. Andjelkovic, M. Krstic, R. Kraemer
Proc. Biannual European - Latin American Summer School on Design, Test and Reliability (BELAS 2017), (2017)

(9) An Analysis of the Operation and SET Robustness of a CMOS Pulse Stretching Circuit
M. Andjelkovic, M. Krstic, R. Kraemer
Proc. IEEE International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS 2017), (2017)

(10) Assessment of the Amplitude-Duration Criterion for SET Robustness Evaluation
M. Andjelkovic, M. Krstic, R. Kraemer
Proc. 23rd IEEE International Symposium on On-Line Testing and Robust System Design (IOLTS 2017), 9 (2017)

(11) An Overview of the Modeling and Simulation of the Single Event Transients at the Circuit Level
M. Andjelkovic, A. Ilic, Z. Stamenkovic, M. Krstic, R. Kraemer
Proc. 30th International Conference on Microelectronics (MIEL 2017), 35 (2017)
The single event transients (SETs) are a common source of malfunction in nano-scale CMOS integrated circuits. For this reason, evaluation of the SET effects and application of appropriate measures for their mitigation are fundamental tasks in the design of advanced radiation hardened integrated circuits. In general, SET analysis is based on the multi-scale modeling and simulation approach comprising four main phases: modeling and simulation of radiation-matter interactions, device level modeling and simulation, circuit level modeling and simulation and system level modeling and simulation. In order to reduce the time and cost of the evaluation and design processes, a lot of effort is invested into the development of appropriate models which could provide reliable SET simulations at the circuit level. The circuit level simulations provide a good trade-off between the complexity and speed of simulation, while at the same time ensure very good accuracy. This paper reviews the approaches for modeling and simulation SET effects at the circuit level, emphasizing the major advantages and disadvantages of each approach.

(12) Evaluation of the Pulse Stretcher for Detection of Very Short Single Event Transients
M. Andjelkovic, M. Nenadovic, V. Petrovic, M. Krstic, R. Kraemer
Proc. 5th International Conference on Radiation and Applications in Various Fields of Research (RAD 2017), 217 (2017)

(13) An Overview of the Current Models for the Circuit-Level Simulations of Single Event Transients
M. Andjelkovic, A. Ilic, Z. Stamenkovic, M. Krstic, R. Kraemer
Proc. 5th International Conference on Radiation and Applications in Various Fields of Research (RAD 2017), 187 (2017)

(14) Comparison of the SET Sensitivity of Standard Logic Gates Designed in 130 nm CMOS Technology
M. Andjelkovic, M. Krstic, R. Kraemer
Proc. 30th International Conference on Microelectronics (MIEL 2017), 217 (2017)

(15) A Critical Charge Model for Estimating the SET and SEU Sensitivity: A Muller C-Element Case Study
M. Andjelkovic, M. Krstic, R. Kraemer, V.S. Veeravalli, A. Steininger
Proc. 26th IEEE Asian Test Symposium (ATS 2017), 78 (2017)

(16) A 60-Channels ADC Board for Space Borne DBF-SAR Applications
E. Arnieri, L. Boccia, G. Amendola, C. Mao, S. Gao, C. Tienda, S. Glisic, P. Penkala, M. Krstic, A. Ho, A. Patyuchenko, U. Yodprasit, O. Schrape, M. Younis
Proc. IEEE AP-S Symposium on Antennas and Propagation (APS 2017), 211 (2017)

(17) A Substrate Noise Reduction Methodology Based on Power Domain Separation of GALS Subcomponents
M. Babic, M. Krstic
Proc. 27th International Symposium on Power and Timing Modeling, Optimization and Simulation (PATMOS 2017), (2017)
In this paper, a methodology for substrate noise reduction in mixed-signal integrated circuits (IC) in lightly doped substrates is proposed. The methodology is based on separating a digital aggressor circuitry into two power domains, one closer and one more distant from the victim. By proper assignment of digital modules in one of those two domains, substrate noise sensed by an analog victim is reduced. Additional reduction is achieved by clocking these two modules with independent clocks, thus making them locally synchronous modules (LSMs) of a GALS (globally-asynchronous, locally synchronous) system. A GALS partitioning algorithm is developed to obtain an optimal noise reduction. The methodology is evaluated by numerical simulations in MATLAB.

(18) 5G Transport Network Requirements for the Next Generation Fronthaul Interface
J. Bartelt, N. Vucic, D. Camps-Mur, E. Garcia-Villegas, I. Demirkol, A. Fehske, M. Grieger, A. Tzanakaki, J. Gutierrez Teran, E. Grass, G. Lyberopoulos, G. Fettweis
EURASIP Journal on Wireless Communications and Networking 89, 1 (2017)
DOI: 10.1186/s13638-017-0874-7, (5G-XHaul)
To meet the requirements of 5G mobile networks, several radio access technologies, such as millimeter wave communications and massive MIMO, are being proposed. In addition, cloud radio access network (C-RAN) architectures are considered instrumental to fully exploit the capabilities of future 5G RANs. However, RAN centralization imposes stringent requirements on the transport network, which today are addressed with purpose-specific and expensive fronthaul links. As the demands on future access networks rise, so will the challenges in the fronthaul and backhaul segments. It is hence of fundamental importance to consider the design of transport networks alongside the definition of future access technologies to avoid the transport becoming a bottleneck. Therefore, we analyze in this work the impact that future RAN technologies will have on the transport network and on the design of the next generation fronthaul interface. To understand the especially important impact of varying user traffic, we utilize measurements from a real-world 4G network and, taking target 5G performance figures into account, extrapolate its statistics to a 5G scenario. With this, we derive both per-cell and aggregated data rate requirements for 5G transport networks. In addition, we show that the effect of statistical multiplexing is an important factor to reduce transport network capacity requirements and costs. Based on our investigations, we provide guidelines for the development of the 5G transport network architecture.

(19) Low-Complexity Framework for Movement Classification Using Body-Worn Sensors
D. Biswas, K. Maharatna, G. Panic, E.B. Mazomenos, J. Achner, J. Klemke, M. Jöbges, St. Ortmann
IEEE Transactions on Very Large Scale Integration (VLSI) Systems 25(4), 1537 (2017)
We present a low-complexity framework for classifying elementary arm-movements (reach-retrieve, lift-cup-tomouth, rotate-arm) using wrist-worn, inertial sensors. We propose
that this methodology could be used as a clinical tool to assess rehabilitation progress in neurodegenerative pathologies tracking occurrence of specific movements performed by patients with their paretic arm. Movements performed in a controlled training-phase are processed to form unique clusters in a multi-dimensional feature-space. Subsequent movements performed in an uncontrolled testing-phase are associated to the proximal cluster
using a minimum distance classifier (MDC). The framework involves performing the compute-intensive clustering of the training-dataset offline (Matlab) whereas the computation of
selected features on the testing-dataset and the minimum distance (Euclidean) from pre-computed cluster centroids are done in hardware with an aim of low-power execution on sensor nodes. The architecture for feature-extraction and MDC are realized using Coordinate Rotation Digital Computer based design which classifies a movement in (9n+31) clock cycles, n being number of data samples. The design synthesized in STMicroelectronics 130nm technology consumed 5.3 nW @50 HZ, besides being functionally verified upto 20 MHz, making it applicable for realtime high-speed operations within sensor node. Our experimental
results show that the system can recognize all three armmovements with average accuracies of 86% and 72% for healthy subjects using accelerometer and gyroscope data respectively,
whereas for stroke survivors the average accuracies were 62% and 57%. The framework was further demonstrated as a FPGA-based real-time system, interfacing with a streaming sensor unit.

(20) Interpolation Algorithm for Asynchronous ADC-Data
S. Bramburger, B. Zinke, D. Killat
Advances in Radio Science 15, 163 (2017)
This paper presents a modified interpolation algorithm for signals with variable data rate from asynchronous ADCs. The Adaptive weights Conjugate gradient Toeplitz matrix (ACT) algorithm is extended to operate with a continuous data stream. An additional preprocessing of data with constant and linear sections and a weighted overlap of step-by-step into spectral domain transformed signals improve the reconstruction of the asycnhronous ADC signal. The interpolation method can be used if asynchronous ADC data is fed into synchronous digital signal processing.

(21) 100 Gbit/s End-to-End Communication: Low Overhead On-Demand Protocol Replacement in High Data Rate Communication Systems
S. Buechner, J. Nolte, A. Hasani, R. Kraemer
42nd IEEE Conference on Local Computer Networks (LCN 2017), 231 (2017)
DOI: 10.1109/LCN.2017.40

(22) Protocol Processing for 100 Gbit/s and Beyond - A Soft Real-Time Approach in Hardware and Software
S. Buechner, L. Lopacinski, R. Kraemer, J. Nolte
Frequenz: Journal of RF-Engineering and Telecommunications 71(9-10), 427 (2017)
100 Gbit/s wireless communication protocol processing stresses all parts of a communication system until the outermost. The efficient use of upcoming 100 Gbit/s and beyond transmission technology requires the rethinking of the way protocols are processed by the communication endpoints. This paper summarizes the achievements of the project End2End100. We will present a comprehensive soft real-time stream processing approach that allows the protocol designer to develop, analyze, and plan scalable protocols for ultra high data rates of 100 Gbit/s and beyond. Furthermore, we will present an ultra-low power, adaptable, and massively parallelized FEC (Forward Error Correction) scheme that detects and corrects bit errors at line rate with an energy consumption between 1 pJ/bit and 13 pJ/bit. The evaluation results discussed in this publication show that our comprehensive approach allows end-to-end communication with processing overheads of less than 0.6% of the theoretically possible data rate.

(23) A NIR-LED Based on Tensile Strained, Heavily Doped Ge/Si µ-Strips Fabricated in a BiCMOS Pilot Line
G. Capellini, St. Lischke, L.-W. Nien, J. Kreissl, Y. Yamamoto, M. Virgilio, J. Schäffner, W.M. Klesse, D. Wolansky, K. Voigt, L. Zimmermann, A. Mai, B. Tillack, T. Schroeder
Proc. IEEE International Conference on Group IV Photonics (GFP 2017), 43 (2017)
(Ge Laser)
We present an edge light emitting diode based on tensile strained, highly doped Ge µ-strips deposited on Si. The device is fully manufactured in a BiCMOS pilot line and shows room temperature NIR electroluminescence in a spectral region extending from the C- to the U- telecom bands and beyond.

(24) Hardware-in-the-Loop Demonstration of a 60 GHz Line-of-Sight 2x2 MIMO Link
D. Cvetkovski, E. Grass, T. Hälsig, B. Lankl
Proc. 17th IEEE International Conference on Smart Technologies (IEEE EUROCON 2017), 631 (2017)
The dawn of 5G requires significantly higher data rates, not only for the Radio Access Technology (RAT), but also for the transport network. Line-of-Sight MIMO links based on mmWave radios promise reaching ultra-high throughput with reasonably small antennas. mmWave links with optimally arranged antennas are one viable concept for spatial multiplexing, capable of potentially achieving Gb/s data rates. In the context of mmWave MIMO system design, providing hardware implementation solutions is essential for bridging the gap from theoretical concepts to real-time operational prototypes. In this paper, we focus on the investigation of the BER performance of an orthogonal spatial-multiplexing LoS MIMO link and its robustness to x- and z-axis antenna displacements. Hardware-in-the-loop measurements are performed with a custom demonstrator built for 60GHz LoS MIMO system verification achieving system data rates of 2.5Gb/s
at uncoded BER of 1e-4. The results largely confirm the theoretical assumptions and the feasibility of LoS MIMO for short to medium range wireless backhaul applications.

(25) ICI - Interference Characterization and Identification for WSN
S. Diaz, D. Mendez, R. Kraemer
Proc. Wireless Telecommunications Symposium (WTS 2017), (2017)
In Wireless Sensor Networks, nodes regularly suffer from interference which is generated by devices working in the same frequency band. Thus, we propose a mechanism which: 1) identifies the percentage of interference in a wireless link; and 2) locates the source of interference. This mechanism is called Interference Characterization and Identification (ICI), and it comprises two phases: interference characterization and identification. In the first phase, we propose a novel metric called LP, which is based on measurements of latency and packet loss, in order to characterize the quality of the wireless link. In the second phase, we identify the percentage of interference of the wireless link by computing two statistical distances: Kolmogorov- Smirnov and Cram´er-von Mises. Besides, in the second phase, we also determine whether the source of interference is close to the transmitter or the receiver. The results show that we can efficiently determine the percentage of interference in a wireless link and the location of the source of interference.

(26) Horizontal DPA Attacks: Low-Cost and High-Effective
Z. Dyka, I. Kabin, D. Kreiser, P. Langendörfer
Proc. 26th Crypto-Day, (2017)

(27) Reliable Wireless Communication and Positioning Enabling Mobile Control and Safety Applications in Industrial Environments
M. Ehrig, M. Petri, V. Sark, A. Tesfay, S. Melnyk, H. Schotten, W. Anwar, N. Franchi, G. Fettweis, N. Marchenko
Proc. IEEE International Conference on Industrial Technology (ICIT 2017), 1301 (2017)
This paper introduces new functionalities for industrial safety applications using the wireless infrastructure of the IEEE 802.11 standard. The new amendments (n/ac/ad) for the 2.4, 5, and 60-GHz-band support additional high data rate modes, for e.g. video applications and device-to-device (D2D) communication. The huge bandwidth in the 60-GHz-band enables precise localization. However, Listen-Before-Talk (LBT) has to be used in order to guarantee fair channel access possibilities and coexistence of many devices. The access requirements are regulated (e.g. by ETSI for the European region). To cope with the uncertainty of coexistence and the special channel conditions in an industrial environment a multi-band PHY and MAC solution with multi-connectivity support is introduced. This enables highly reliable low-latency wireless communication links for industrial safety applications. The simultaneous Round-Trip-Time-of-Flight (RTToF) ranging measurements enable position based features, like the introduced virtual safe zone.

(28) Ein Leistungsmesssystem für verteilte Sensorknoten zur Unterstützung bei der Implementierung von Protokollen in WSN
M. Frohberg, M. Schölzel
Proc. GI/ITG KuVS Fachgespräch Sensornetze (FGSN 2017), 27 (2017)
Die Minimierung des Energieverbrauchs in batteriebetriebenen drahtlosen Sensornetzwerken (WSN) ist eine der größten Herausforderungen und erfordert eine Bewertung bereits während der Entwicklungsphase. Diese Abschätzung kann in frühen Entwurfsphasen durch Simulationen und Modelle erfolgen. Ein abschließender Test unter realen Umgebungsbedingungen kann diese Annahmen überprüfen. In diesem Beitrag wird die WISDOM-Plattform vorgestellt, die selbst als Sensorknoten fungiert und mit einem 24\,bit AD-Wandler zur Messung der Leistung von Sensorknoten in einem WSN ausgestattet ist. Messungen können drahtlos an eine Senke übermittelt und ein Verbrauchsprofil für ein großflächiges WSN unter realistischen Lastbedingungen erstellt werden. Die WISDOM-Plattform bietet einen sehr hohen dynamischen Messbereich, der für die Überwachung von Sensorknoten, die häufig zwischen stromsparendem und aktivem Modus wechseln, wichtig ist.

(29) WISDOM - A Wireless Debugging and Power Measurement System for Field Tests and Device Observation in WSN
M. Frohberg, E. Batlkhagva, M. Schölzel
Proc. 21st Signal Processing: Algorithms, Architectures, Arrangements, and Applications (SPA 2017), 319 (2017)
Energy consumption is a major concern in battery
powered wireless sensor networks (WSN). For that reason there
is a strong demand for the evaluation of power consumption
of nodes in a wireless sensor network during its development
phase. This evaluation can be done in early design stages by
using simulations and models, but there is also the need for an
evaluation in a real setup. This paper presents the WISDOM
platform, which is a sensor node by itself, equipped with a 24-
bit ADC converter that is used to measure power consumption
of sensor nodes in a WSN. Monitored measurements can be
transmitted wireless to a sink. In that way a power consumption
profile can be created for a large scale WSN under realistic load
conditions. The WISDOM platform provides a very high dynamic
range for power metering, which is important for monitoring
sensor nodes that operate in deep sleep modes as well as in high
power transmission modes.

(30) Theoretical Aspects of a Design Method for Programmable NMR Voters
E. Hadzieva, A. Simevski
Proc. 17th IEEE International Conference on Smart Technologies (EUROCON 2017), 301 (2017)

(31) Measurement Results for Millimeter Wave pure LOS MIMO Channels
T. Hälsig, D. Cvetkovski, E. Grass, B. Lankl
Proc. IEEE Wireless Communications and Networking Conference (WCNC 2017), (2017)
In this paper we present measurement results for pure line-of-sight MIMO links operating in the millimeter wave range. We show that the estimated condition numbers and capacities of the measured channels are in good agreement with the theory for various transmission distances and antenna setups. Furthermore, the results show that orthogonal channel vectors can be observed if the spacing criterion is fulfilled, thus facilitating spatial multiplexing and achieving high spectral efficiencies even over fairly long distances. Spacings generating ill-conditioned channel matrices show on the other hand significantly reduced performance.

(32) An Integrated Frequency Synthesizer in 130nm SiGe BiCMOS Technology for 28/38GHz 5G Wireless Networks 
F. Herzel, M. Kucharski, A. Ergintav, J. Borngräber, H.J. Ng, J. Domke, D. Kissinger
Proc. 12th European Microwave Integrated Circuits Conference (EuMIC 2017), 236 (2017)
(Benchmarking Circuits/Radar Systems)

(33) Simulation of Heavy Ion Impact on CMOS Inverters in 0.25 µm
U. Jagdhold
Proc. Data Systems In Aerospace (DASIA 2017), (2017)

(34) System Design of a Mixed Signal PSSS Transceiver using a Linear Ultra-Broadband Analog Correlator for the Receiver Baseband Designed in 130 nm SiGe BiCMOS Technology
A.R. Javed, J.C. Scheytt, K. KrishneGowda, R. Kraemer
Proc. 17th IEEE International Conference on Smart Technologies (EUROCON 2017), 228 (2017)
DOI: 10.1109/EUROCON.2017.8011110

(35) DEMO: EMA as a Mean to Find Spatial and Time SCA Leakage Sources
I. Kabin, E. Vogel, Z. Dyka, P. Langendörfer
Proc. International Conference on Reconfigurable Computing and FPGAs (ReConFig 2017), (2017)
(fast sign)

(36) Methods for Increasing the Resistance of Cryptographic Designs against Horizontal DPA Attacks
I. Kabin, Z. Dyka, D. Kreiser, P. Langendörfer
Proc. 19th International Conference on Information and Communications Security (ICICS 2017), (2017)

(37) Horizontal Address-Bit DPA against Montgomery kP Implementation
I. Kabin, Z. Dyka, D. Kreiser, P. Langendörfer
Proc. International Conference on Reconfigurable Computing and FPGAs (ReConFig 2017), (2017)

(38) Attack against Montgomery kP Implementation: Horizontal Address-Bit DPA?
I. Kabin, Z. Dyka, D. Kreiser, P. Langendörfer
Proc. EUROMICRO Conference on Digital System Design (DSD/SEAA 2017), (2017)

(39) Evaluation of Resistance of ECC Designs protected by Different Randomization Countermeasures against Horizontal DPA Attacks
I. Kabin, Z. Dyka, D. Kreiser, P. Langendörfer
Proc. 15th IEEE East-West Design & Test Symposium (EWDTS 2017), 398 (2017)
In this paper we investigate how different randomization approaches influence the success of horizontal DPA attacks. We use our own ECC design to run the experiments. We applied the following randomization techniques: EC point blinding, key randomization and a combination of both. Our experiments demonstrate the fact that these well-known randomizations of processed data are not effective against horizontal DPA attacks. In addition we investigated randomized calculation sequences of partial multiplications, i.e. a kind of intermediate data randomization, as potential countermeasures. We simulated power traces of elliptic curve point multiplication kP for all applied countermeasures and performed our low-cost horizontal DPA attack. We applied a difference of means test to reveal the scalar k. Our experiments show that the randomization of the processing sequence of the partial multiplications improves the resistance of the design against horizontal attacks significantly but is not sufficient as the only means against DPA attacks.

(40) Horizontal DEMA Attack as Low Cost Effective Mean to Reveal Keys
I. Kabin, Z. Dyka, Ch. Wittke, D. Kreiser, P. Langendörfer
Proc. 26th Crypto-Day, (2017)

(41) Data Path Optimisation and Delay Matching for Asynchronous Bundled-Data Balsa Circuits
N. Kluge, R. Wollowski
Proc. IEEE International Conference on Computer-Aided Design (ICCAD 2017), 408 (2017)

(42) SECI - Lightweight Interpreter for Security Algorithms
St. Kornemann, P. Langendörfer, O. Stecklina
Proc. ACM Workshop on Internet of Things (IOT) Security: Issues and Innovations (MobiHoc 2017), (2017)
Wireless Sensor Networks (WSN), the Internet of Things (IoT) etc. are built using resource constraint devices. The hardware is compiled of different types of micro-controllers and radio frontends on which a plethora of operating systems and protocols is deployed. This poses a huge challenge when developing an intrusion detection system (IDS) that shall be applicable for IoT and WSNs. In order to facilitate such an IDS that is independent of the target platform we propose a security interpreter. In this paper we introduce its concept and architecture and discuss performance parameters such as memory footprint and execution times of different virtualization techniques. Our measurement results indicate clearly that virtualization is feasible. Executing a single instruction takes only 4.2 micro seconds and 1.0 micro seconds in the worst case and the best case, respectively. 

(43) Modular BiCMOS 60-GHz Beamforming Solution for Scalable 5G Backhaul Networks
M. Ko, A. Malignaggi, A.C. Ulusoy, J. Gutierrez Teran, D. Kissinger
Proc. IEEE MTT-S International Microwave Symposium (IMS 2017), Workshop WMO-8 (2017)
A modular beamforming architecture utilizing multiple beamforming ICs and a separate IQ modem IC is a very efficient solution for scalable 5G backhaul networks. The beamforming IC consists of amplifiers and vector modulators, and the modem IC includes up- and down-converters with an integrated PLL. The proposed solution is highly compact, and can be expanded in a modular fashion, making it suitable for communication in small-cell backhaul networks. In this presentation, IC development in 130-nm SiGe BiCMOS process as well as IC-/system-level characterization will be discussed.

(44) Challenges and Ideas to Achieve Wireless 100 Gb/s Transmission
R. Kraemer
Proc. 17th IEEE International Conference on Smart Technologies (EUROCON 2017), 624 (2017)

(45) Wireless 100Gb/s and Beyond: Progress in Ultra-Fast Wireless Communications
R. Kraemer
Proc. 47th European Microwave Week (EuMW 2017), Workshop (2017)

(46) Challenges and Ideas to Achieve Wireless 100 Gb/s Transmission: An Overview of Challenges and Solutions within the German Research Foundation (DFG) Special Priority Program SPP1655
R. Kraemer
Frequenz: Journal of RF-Engineering and Telecommunications 71(9-10), 363 (2017)
Wireless communications is one of the fastest growing technology fields, driving numerous other innovations in electronics. One challenging research area within the wireless field is to achieve much higher transmission rates. First products with up to 3 Gb/s are in the market. In the coming years we predict this speed growing quickly up to and beyond 100 Gb/s. Today it is an open question how we can realize a wireless system at this speed. If we intend to use such systems in a mobile environment, we can only afford to spend approximately 1-10 pW/b for the end-to-end communication. This includes RF-transmission and all processing and protocol steps. The SPP1655 of the DFG was set up to investigate new paradigms for achieving the 100 Gb/s wireless transmission goal. Within 11 coordinated projects researchers from all over Germany are addressing several relevant issues ranging from the antennas and RF-Frontend, baseband- processing and error correction to protocol processing. A number of limitations of current approaches have to be investigated and new algorithms must be found in order to achieve the intended goal. One of the big challenges is finding the correct balance between analog and digital signal processing to achieve an extremely high performance at very low energy consumption. Another challenge is to find a good balance between bandwidth and bandwidth efficiency to achieve the 100 Gbps goal. Finally, protocol processing will need new approaches to decouple the central processor of a computer from the high-end input/output operations. Within this editorial we will address the main challenges and briefly outline the approaches of the running projects. The rest of this special issue will be devoted to more detailed descriptions and achievements of the individual projects of SPP1655.

(47) Run-Time Refreshing of Symmetric Keys in Automation Systems as Countermeasure against Real-Time Attacks
D. Kreiser, Z. Dyka, P. Langendörfer
Proc. 26th Crypto-Day, (2017)

(48) On Wireless Channel Parameters for Key Generation in Industrial Environments
D. Kreiser, Z. Dyka, S. Kornemann, Ch. Wittke, I. Kabin, P. Langendörfer
IEEE Access 5, 79010 (2017)
The advent of industry 4.0 with its idea of individualized mass production will significantly increase the demand for more flexibility on the production floor. Wireless communication provides this type of flexibility but puts the automation system at risk as potential attackers now can eavesdrop or even manipulate the messages exchanged even without getting access to the premises of the victim. Cryptographic means can prevent such attacks is applied properly. One of their core components is the distribution of keys. Here the generation of keys from channel parameters seems to be a promising approach as it avoids additional effort for exchanging keys. In this paper we investigated key generation approaches using channel parameters recorded in a real industrial environment. Our key results are that the key generation may take unpredictable long and that the resulting keys are of low quality with respect to the test for randomness we applied.

(49) Asynchronous and GALS Design – Overview and Perspectives
M. Krstic, E. Grass, X. Fan
Proc. New Generation of Circuits and Systems Conference (NGCAS 2017), 85 (2017)

(50) Reducing Switching Noise Effects by Advanced Clock Management
M. Krstic, X. Fan, M. Babic, E. Grass, T. Bjerregaard, A. Yakovlev
Proc. International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo 2017), 3 (2017)

(51) Reducing Switching Noise Effects by Advanced Clock Management
M. Krstic, X. Fan, M. Babic, E. Grass, T. Bjerregaard, A. Yakovlev
Proc. International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo 2017), 3 (2017)

(52) Reducing Switching Noise Effects by Advanced Clock Management
M. Krstic, X. Fan, M. Babic, E. Grass, T. Bjerregaard, A. Yakovlev
Proc. International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo 2017), 3 (2017)

(53) Determination of Electrical Parameters of Dried Blood Spot Samples with Different Concentration of Methotrexate
J. Laketa, M. Radovanovic, T. Kojic, G. Stojanovic, S. Vukmirovic, M. Mikov, Z. Stamenkovic
Proc. 15th IEEE East-West Design & Test Symposium (EWDTS 2017), 53 (2017)
The application of dried blood spot (DBS - a sample of filter paper bearing dried blood) is rapidly gaining momentum within the clinical chemistry and pharmaceutical industry, for disease detection and drug development, driven by advantages such as small biological sample, easy shipment, and easy storage. This paper presents electrical characterization of DBS samples with different concentrations of a chemotherapy agent – drug methotrexate (MTX). Experimental characterization was conducted using a Hall-effect measurement system, profilometer, and impedance analyzer. Obtained results revealed that mobility decreases and resistivity increases with an increase of MTX concentration in DBS samples.

(54) Data Link Layer Considerations for Future 100 Gbps Terahertz Band Transceivers
L. Lopacinski, M. Brzozowski, R. Kraemer
Wireless Communications and Mobile Computing 2017, 3560521 (2017)
This paper presents a hardware processor for 100 Gbps wireless data link layer. A serial
Reed-Solomon decoder requires a clock of 12.5 GHz to fulfill timings constraints of the
transmission. Receiving a single Ethernet frame on a 100 Gbps physical layer may be faster than
accessing DDR3 memory. Processing so fast streams on a state of the art FPGA (field
programmable gate arrays) requires a dedicated approach. Thus, the paper presents lightweight RS
FEC engine, frames fragmentation, aggregation, and a protocol with selective fragment
retransmission. The implemented FPGA demonstrator achieves nearly 120 Gbps and accepts bit
error rate (BER) up to 2e-3. Moreover, redundancy added to the frames is adopted according to
the channel BER by a dedicated link adaptation algorithm. At the end, ASIC synthesis results are
presented including detailed statistics of consumed energy per bit.

(55) Improving Energy Efficiency Using a Link Adaptation Algorithm Dedicated for 100 Gbps Wireless Communication
L. Lopacinski, M. Brzozowski, R. Kraemer, S. Buechner, J. Nolte
AEÜ - International Journal of Electronics and Communications 81, 67 (2017)
This paper presents a link adaptation algorithm dedicated for 100 Gbps wireless transmission. Interleaved Reed-Solomon codes are selected as forward error correction (FEC) algorithms. The redundancy of the codes is selected according to the channel bit error rate (BER). The uncomplicated FEC scheme allows implementing a complete data link layer processor in an FPGA (field programmable gate array). In our case, we use the Virtex7 FPGA to validate the functionality of our implementation. The proposed FPGA-processor achieves 169 Gbps throughput. Moreover, the implementation is synthesized into 40 nm CMOS technology and the described link adaptation algorithm allows reducing consumed energy per bit to values below 1 pJ/bit at BER < 1e-4. With higher BER, the energy increases up to ~13 pJ/bit.

(56) Towards 100 Gbps Wireless Communication: Investigation of FEC Interleavers for PSSS-15 Spreading
L. Lopacinski, M. Brzozowski, R. Kraemer, K. KrishneGowda, S. Buechner, J. Nolte
Proc. 17th IEEE International Conference on Smart Technologies (EUROCON 2017), 619 (2017)
The main aspect considered in this paper is a comparison of interleaver sizes for convolutional and low-density parity-check codes (LDPC) employed for 100 Gbps wireless communication at 240 GHz with parallel sequence spread spectrum (PSSS). Interleavers required for PSSS 15 and convolutional codes are larger in silicon area than a complete Reed-Solomon decoder. Thus, convolutional codes are not recommended for the targeted application. LDPC codes require 10× smaller interleavers than convolutional codes and seem to be a good choice for the targeted data rate. Alternatively, interleaved Reed-Solomon decoders are proposed. Hard decision RS decoding reduces the size of the targeted forward error correction processor and provides error correction performance not lower than hard decision convolutional codes at the same code rate.

(57) X/Ka-Band Dual-Polarized Digital Beamforming Synthetic Aperture Radar
C. Mao, S. Gao, C. Tienda, S. Glisic, E. Arnieri, P. Penkala, M. Krstic, A. Dominuez, A. Patyuchenko, F. Qin, U. Yodprasit, O. Schrape, L. Boccia, M. Younis, E. Celton, V. Petrovic
IEEE Transactions on Microwave Theory and Techniques 65(11), 4400 (2017)
This paper presents a digital beamforming (DBF) synthetic aperture radar (SAR) for future spaceborne earth observation systems. The objective of the DBF-SAR system is
to achieve a low cost, lightweight, low-power consumption, and dual-band (X/Ka) dual-polarized module for the next-generation spaceborne SAR system in Europe. The architectures and modules of the proposed DBF-SAR system are designed according to
a realistic mission scenario, which is compatible with the future small/microsatellites platforms. This system fills an important gap in the conception of the future DBF-SAR, facilitating a high level of integration and complexity reduction. The proposed system is considered not only the first demonstrator of a receiveonly spaceborne DBF system, but also the first X/Ka-band dualpolarized SAR system with shared aperture. This paper presents
a description of the proposed instrument hardware and first experimental validations. The concept and design of the DBF multistatic SAR system are discussed and presented first, followed by the design of subsystems such as DBF networks, microwave integrated circuit, and antennas. Simulated and measured results of the subsystems are presented, demonstrating that the proposed SAR instrument architecture is well-suited for the future SAR

(58) Next Generation Industrial Radio LAN for Tactile and Safety Applications
S. Melnyk, A. Tesfay, H. Schotten, J. Rambach, D. Stricker, M. Petri, M. Ehrig, T. Augustin, N. Franchi, G. Fettweis, O. Artemenko, M. Schneider, M. Aleksy
Proc. 22. ITG Fachtagung Mobilkommunikation, 49 (2017)
Advanced industrial applications as augmented reality support for maintenance works or mobile control panels require new reliable wireless connectivity solutions that are not available today. Based on an analysis of some representative use cases, this paper identifies and quantitatively describes the resulting requirements on the wireless systems and provides a comparison to state of the art solutions. In a second part, this paper introduces a new industrial radio concept that is able to meet the derived requirements. The overall concept and the most important features allowing to meet the requirements is discussed in detail.

(59) IoT based Flood Embankments Monitoring System
E. Michta, R. Szulim, A. Sojka-Piotrowska, K. Piotrowski
Photonics Applications in Astronomy, Communications, Industry, and High-Energy Physics Experiments 2017, SPIE Proceedings, 104455Y (2017)
DOI: 10.1117/12.2280830, (SmartRiver)
In the paper a concept of flood embankments monitoring system based on using Internet of Things approach and Cloud Computing technologies will be presented. The proposed system consists of sensors, IoT nodes, Gateways and Cloud based services. Nodes communicates with the sensors measuring certain physical parameters describing the state of the embankments and communicates with the Gateways. Gateways are specialized active devices responsible for direct communication with the nodes, collecting sensor data, preprocess the data, applying local rules and communicate with the Cloud Services using communication API delivered by cloud services providers. Architecture of all of the system components will be proposed consisting IoT devices functionalities description, their communication model, software modules and services bases on using a public cloud computing platform like Microsoft Azure will be proposed. The most important aspects of maintaining the communication in a secure way will be shown.

(60) Correcting Transient Faults Using Rollback with Low Overhead for Microcontrollers
F. Mühlbauer, M. Schölzel
Proc. International Workshop on Resiliency in Embedded Electronic Systems (REES 2017), 25 (2017)

(61) Correcting Transient Faults Using Rollback with Low Overhead for Microcontrollers
F. Mühlbauer, M. Schölzel
Proc. International Workshop on Resiliency in Embedded Electronic Systems (REES 2017), 25 (2017)

(62) Handling of Permanent Faults in Dynamically Scheduled Processors
F. Mühlbauer, L. Schröder, M. Schölzel
Proc. 23rd IEEE International Symposium on On-Line Testing and Robust System Design (IOLTS 2017), 203 (2017)

(63) On Hardware-Based Fault-Handling in Dynamically Scheduled Processors
F. Mühlbauer, L. Schröder, M. Schölzel
Proc. IEEE International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS 2017), (2017)

(64) Korrektur transienter Fehler durch Rollback mit geringem Software-Overhead für Mikrocontroller
F. Mühlbauer, M. Schölzel
Proc. ITG/GI/GMM-Workshop Testmethoden und Zuverlässigkeit von Schaltungen und Systemen (TuZ 2017), 53 (2017)

(65) Handling Manufacturing and Aging Faults with Software-Based Techniques in Tiny Embedded Systems
F. Mühlbauer, L. Schröder, P. Skoncej, M. Schölzel
Proc. IEEE Latin American Test Symposium (LATS 2017), (2017)

(66) Handling Manufacturing and Aging Faults with Software-Based Techniques in Tiny Embedded Systems
F. Mühlbauer, L. Schröder, P. Skoncej, M. Schölzel
Proc. IEEE Latin American Test Symposium (LATS 2017), (2017)

(67) Handling of Permanent Faults in Dynamically Scheduled Processors
F. Mühlbauer, L. Schröder, M. Schölzel
Proc. 23rd IEEE International Symposium on On-Line Testing and Robust System Design (IOLTS 2017), 203 (2017)

(68) On Hardware-Based Fault-Handling in Dynamically Scheduled Processors
F. Mühlbauer, L. Schröder, M. Schölzel
Proc. IEEE International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS 2017), (2017)

(69) Korrektur transienter Fehler durch Rollback mit geringem Software-Overhead für Mikrocontroller
F. Mühlbauer, M. Schölzel
Proc. ITG/GI/GMM-Workshop Testmethoden und Zuverlässigkeit von Schaltungen und Systemen (TuZ 2017), 53 (2017)

(70) BPPT - Bulk Potential Protection Management Technique for Hardened Sequentials
I. Nofal, Y.-Q. Li, L. Chen, R. Liu, H.-B. Wang, M. Chen, A.-L. Lee, G. Guo, S.H. Baeg, S.-J. Wen, R. Wong
Proc. 23rd IEEE International Symposium on On-Line Testing and Robust System Design (IOLTS 2017), 28 (2017)

(71) Soft Error Hardened Flip-Flop Based on a Novel Bulk Potential Management Technique
I. Nofal, Y.-Q. Li, L. Chen, R. Liu, H.-B. Wang, M. Chen, A. Evans, A.-L. He, G. Guo, S.H. Baeg, S.-J. Wen, R. Wong
Proc. 13th Workshop on Silicon Errors in Logic – System Effects (SELSE 2017), (2017)

(72) A Low-Latency Real-Time Medium Access Control Protocol for Industrial Automation
N.A. Odhah, K. Tittelbach-Helmrich, Z. Stamenkovic
Proc. 30th International Conference on Microelectronics (MIEL 2017), 243 (2017)
In this paper, we describe the design, simulation, testing, and implementation of a high-reliability and ultra-low-latency wireless Medium Access Control (MAC) protocol for industry automation applications. Our solution is an extension of the wired Field Bus systems used in the industry automation. It is a part of a large collaborative project called DEAL [1]. Our contribution is focused on the Medium Access Control (MAC) and baseband processors of the wireless communication module [2].
In industry automation, the most important system parameters to be fully optimized are the end-to-end (E2E) latency and the reliability of the network connectivity. The E2E latency must be minimized to a value equal to or less than 0.5 ms and the reliability must be improved to maintain a packet error rate equal to or less than 10-9. Also, a reasonable data rate equal to or greater than 20 Mbps must be satisfied. In addition to reliable and real time communications, reliable and real time positioning with high accuracy is aimed in the DEAL project. 
Reliable and real time communication can be easily secured by wired LAN (e.g. wired field bus system). On the other hand, reliable and real time wireless communication for industry automation, to simplify device installation and allow mobile nodes to be attached, is still challenging. Many research activities are recently conducted to tackle this challenge and to satisfy the so-called "Industry 4.0" requirements.
In this paper, a hardware solution for high-reliability and ultra-low-latency wireless Medium Access Control (MAC) protocol is proposed and investigated in terms of data throughput, latency, and network size. A detailed description of the DEAL system architecture can be found in our previous work [3]. Figure 1 shows how it complements its wired counterpart. Reliable and real time MAC protocol is proposed, simulated, tested, and hardware implemented to satisfy the two important requirements of the industry automation. The focus of the paper is to study the MAC protocol performance, i.e. achievable round-trip delay (which equals the super-frame period) as a function of number of nodes in the network, data packet size, data rate, acknowledgement policy, etc., as shown exemplarily in Figure 2.

(73) A Single Chip 16 GS/s Arbitrary Waveform Generator in 0.13 µm BiCMOS Technology
P. Ostrovskyy, K. Tittelbach-Helmrich, F. Herzel, O. Schrape, G. Fischer, D. Kissinger, P. Börner, A. Loose, D. Hellmann, P. Hartogh
Proc. IEEE Nordic Circuits and Systems Conference (NORCAS 2017), (2017)
(ChirpIC Phase2)

(74) Design and Implementation of Hardware Platform for Monitoring Honeybee Activity
U. Pesovic, S. Randjic, Z. Stamenkovic
Proc. 4th International Conference on Electrical, Electronic and Computing Engineering (ICETRAN 2017), RTI1.5.1 (2017)
Remote monitoring of beehive colonies becomes an interesting topic in the field of precision agriculture. One of the most relevant parameters which give insight into beehive health is the bee activity at beehive entrance. This paper presents design of a dedicated bee counter which is located at the beehive entrance to count bees entering or leaving the beehive. Paper also presents the counter’s implementation on FPGA platform which can be used for field measurements of the bee activity.

(75) Kommunikation in heterogenen Sensornetzwerken mittels Cross-Plattform und Multiradio-Gateways
P. Poppe, D. Puhan, S. Reinhold, M. Frohberg, M. Schölzel
Proc. 16. GI/ITG KuVS Fachgespräch Sensornetze (FGSN 2017), 39 (2017)

(76) An Approach for Implementation of Ranging and Positioning Methods on a Software Defined Radio
V. Sark, N. Maletic, J. Gutierrez Teran, E. Grass
Proc. 14th IEEE Workshop on Positioning, Navigation and Communications (WPNC 2017), (2017)
DOI: 10.1109/WPNC.2017.8250064, (5G-XHaul)
In this paper an approach for implementation of a time of flight ranging and positioning methods
on a software defined radio (SDR) platform is presented.
The proposed approach is intended to be implemented in software on a host computer without changing the existing hardware of the
SDR platform. 

Using this approach a two way ranging (TWR) method is implemented on a SDR platform. All of the necessary processing is
performed in C/C++. This implementation was tested in the
2.4/5 GHz ISM band, with a channel bandwidth of 25 MHz.
It achieves a nanosecond timing precision, needed in time of flight (ToF) based ranging
and positioning applications.
A ranging accuracy better than 1 meter was achieved and demonstrated.
The developed TWR system performs 100 distance estimations per second. Nevertheless, with the processing power of the
currently available general purpose processors a distance estimation rate of over 500 estimations per second can be achieved.
The proposed approach can be also used in positioning scenarios, by performing TWR with multiple anchor nodes.

(77) 100 Gbps Wireless System and Circuit Design Using Parallel Spread-Spectrum Sequencing
J.C. Scheytt, A.R. Javed, E.R. Bammidi, K. KrishneGowda, I. Kallfass, R. Kraemer
Frequenz: Journal of RF-Engineering and Telecommunications 71(9-10), 399 (2017)
In this article mixed analog/digital Signal processing techniques based on parallel spread-spectrum sequencing (PSSS) and radio frequency (RF) carrier synchronization for ultra-broadband wireless communication are investigated on system and circuit level.

(78) New Tools for Developing Dependable Wireless Sensor Networks
M. Schölzel, M. Frohberg, St. Weidling
International Journal of Sensor Networks and Data Communication 6(1), 55 (2017)


(79) Routing Approach for Digital, Differential Bipolar Designs Using Virtual Fat-Wire Boundary Pins
O. Schrape, M. Herrmann, F. Winkler, M. Krstic
Proc. IEEE International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS 2017), (2017)

(80) MOTARO - a Fault-Tolerant NOR Flash Memory Controller for Embedded Systems
P. Skoncej, O. Schrape
Proc. 17th Non-Volatile Memory Technology Symposium (NVMTS 2017), abstr. book, 120 (2017)

(81) Shortening the Security Parameters in Lightweight WSN Applications for IoT - Lessons Learned
A. Sojka-Piotrowska, P. Langendörfer
Proc. IEEE PerCom Workshop on Security Privacy and Trust in the Internet of Things (PerCom 2017), (2017)
The Wireless Sensor Networks (WSN) are important
part of Internet of Things. And one of the important requirements
of WSN is to ensure that the data exchanged within these
networks is secured. Since WSNs consist of resource constrained
devices, it is crucial to investigate new, lightweight security
solutions, which ensure fast computations, reduced energy consumption
and desired level of security. This paper proposes using
cryptographic algorithms based on Elliptic Curves, but with
reduced key lengths, what makes them suitable for WSN. For this
new idea, the security analysis was performed and the application
areas were proposed.

(82) High Throughput Line-of-Sight MIMO Systems for Next Generation Backhaul Applications
X. Song, D. Cvetkovski, T. Hälsig, W. Rave, G. Fettweis, E. Grass, B. Lankl
Frequenz: Journal of RF-Engineering and Telecommunications 71(9-10), 389 (2017)
The evolution to ultra-dense next generation networks requires a massive increase in throughput and deployment flexibility. Therefore, novel wireless backhaul solutions that can support these demands are needed. In this work we present an approach for a millimeter wave line-of-sight MIMO backhaul design, targeting transmission rates in the order of 100 Gbit/s. We provide theoretical foundations for the concept showcasing its potential, which are confirmed through channel measurements. Furthermore, we provide insights into the System design with respect to antenna array setup, baseband processing, synchronization, and channel equalization. Implementation in a 60 GHz demonstrator setup proves the feasibility of the System concept for high throughput backhauling in next generation networks.

(83) E-Plane Waveguide Bandstop Filter with Double Sided Printed-Circuit Insert
S. Stefanovski-Pajovic, M. Potrebic, D. Tosic, Z. Stamenkovic
Facta Universitatis, Series: Electronics and Energetics 30(2), 223 (2017)
In this paper a novel design of E-plane bandstop waveguide filter with double-sided printed-circuit insert is presented. Split-ring resonators are used as resonating elements to obtain bandstop response. The amplitude response of the waveguide resonator with a single resonating element on the insert is analyzed for various dimensions and positions of the split-ring resonator. The coupling between two resonators on the insert, in terms of their mutual distance, is considered as a next step to the filter design. Various positions of the resonators are considered, including the case with the resonators on the different sides of the insert, which is of interest for the proposed filter design. Finally, third-order bandstop filter with double-sided printed-circuit insert, operating in the X-frequency band, is introduced. The filter response is analyzed for various distances between the resonators and for various positions of the resonator printed on the other side of the insert. Proposed filter design is simple, providing for the accurate fabrication, miniaturization and possibility to relatively easy obtain multi-band response, using resonators with different resonant frequencies on the different sides of the insert.

(84) Sensors and Electronic Systems for Agricultural and Environmental Monitoring
G. Stojanovic, Z. Stamenkovic
Proc. IEEE International Symposium on Design and Diagnostics of Electronic Circuits and Systems (DDECS 2017), (2017)
This tutorial will review design, fabrication and characterization of sensors intended for use in agriculture and monitoring of the relevant environmental parameters. Sensors were fabricated in two technologies: LTCC (low-temperature co-fired ceramics) and flexible technology. The first one provides robust sensors which can be exposed to harsh environment and the other one is an ink-jet technology which can manufacture sensors on flexible substrates (foils, papers, etc.) and can be rolled around the plants. The tutorial will describe the use of these sensors in real-time monitoring and data acquisition. We will present an in-house developed electronic system for testing above-mentioned sensors, which is miniature and hand-held. In addition to this, a microcontroller-based multi-sensor system for remote environmental monitoring with autonomous power supply (solar panels) will be described. Cloud-based electronic system for air and water quality monitoring with the IBM Watson IoT platform will be also presented. We will demonstrate PC browser view of our data logger web-page, which provides on-line real-time monitoring of the relevant environmental parameters.

(85) A Novel Medium Access Control Protocol for Real-Time Wireless Communications in Industrial Automation
K. Tittelbach-Helmrich, N.A. Odhah, Z. Stamenkovic
International Journal of Communications, Network and System Science (IJCNS) 10(11), 282 (2017)
In this paper, a novel Medium Access Control (MAC) protocol for industrial Wireless Local Area Networks (WLANs) is proposed and studied that achieves the urgent re-quirements of the industry automation. The main challenge in industry automation systems is the ultra-low network latency with a target upper bound in the order of 1 ms while maintaining high network reliability and availability. The novelty of our MAC protocol resides in its similar latency performance as its counterpart in wired industrial LAN, but wirelessly. First, we describe the functional design of the MAC protocol, then its performance results gained from hardware-oriented software tools (i.e. SystemC and VHDL), and finally its hardware implementation on an FPGA platform to build a real-time communication module, which achieves the ultra-low latency requirement of the industrial automation.

(86) Wireless-Optical Network Convergence: Enabling the 5G Architecture to Support Operational and End-User Services
A. Tzanakaki, M. Anastasopoulos, I. Berberana, D. Syrivelis, P. Flegkas, T. Korakis, D. Camps-Mur, I. Demirkol, J. Gutierrez Teran, E. Grass, Q. Wei, E. Pateromichelakis, N. Vucic, A. Fehske, M. Grieger, M. Eiselt, J. Bartelt, G. Fettweis, G. Lyberopoulos, E. Theodoropoulou, D. Simeonidou
IEEE Communications Magazine, GCN (Global Communications Newsletters) 55(10), 184 (2017)
DOI: 10.1109/MCOM.2017.1600643, (5G-XHaul)
This article presents a converged 5G network infrastructure and an overarching architecture to jointly support operational network and end-user services, proposed by the EU 5G PPP project 5G-XHaul. The 5G-XHaul infrastructure adopts a common fronthaul/backhaul network solution, deploying a wealth of wireless technologies and a hybrid active/passive optical transport, supporting flexible fronthaul split options. This infrastructure is evaluated through a novel modeling. Numerical results indicate significant energy savings at the expense of increased end-user service delay.

(87) The SRS Platform - an Approach for Fail Operational Radar Measurements and Communication in Highly Automated Driving
M. Ulbricht, M. Schölzel, R. Syed, M. Krstic
Proc. 2nd IEEE International Workshop on Automotive Reliability & Test (ART17), (2017)

(88) ParSec: Wireless Industrial Communication - First PSSS Measurements in Industrial Environment
L. Underberg, R. Croonenbroeck, R. Kays, R. Kraemer
Proc. 13th IEEE International Workshop on Factory Communication Systems (WFCS 2017), (2017)

(89) Investigation of New NV Memory Architectures for Low Duty-Cycle Embedded Systems
F. Vater, M. Schölzel
Proc. 15th IEEE East-West Design & Test Symposium (EWDTS 2017), 289 (2017)
Processors in sensor nodes offer very deep sleep modes to save energy and to increase the battery lifetime with the disadvantage that the content of the volatile memory will be typically lost in these modes. The backup and restore of data from volatile to nonvolatile memories is expensive regarding the energy budget. Emerging new memory technologies offer the
opportunity for new memory layouts in such embedded processors, and possibly help to reduce the energy consumption in low-duty cycle application. In this work an energy estimation approach for low-dutycycle applications is presented, which estimates the energy cost, based on memory operations only. With that approach various memory layouts based on new non- volatile memory architectures are compared against each other. It turns out that the use of the new NV memories is a massive gain for the lifetime of sensor nodes.

(90) An Overview of Cross-Layer Resilience Design Methods
M. Veleski, R. Kraemer, M. Krstic
Proc. RESCUE 2017, (2017)

(91) Identifizierung fehlerbewahrender Speicherelemente zur Vermeidung der Fehlerakkumulation
S. Weidling, M. Krstic, M. Gössel
Proc. ITG/GI/GMM-Workshop Testmethoden und Zuverlässigkeit von Schaltungen und Systemen (TuZ 2017), 55 (2017)

(92) Outdoor Range Measurements in Sub-GHz License-Free Radio Bands under Realistic Conditions
S. Weidling, N. Todtenberg, T. Basmer, M. Schölzel, M. Maaser, M. Taubert
Proc. ACM International Symposium on Mobility Management and Wireless Access (MOBIWAC 2017), 71 (2017)

(93) Selecting the Best Suitable EM Probe Using Horizontal DEMA Attack
Ch. Wittke, I. Kabin, D. Kreiser, Z. Dyka, P. Langendörfer
Proc. 26th Crypto-Day, (2017)

(94) A Multiplying 1.5V 12-bit 60-MS/s Current Steering CMOS Digital-to-Analog Converter for Low Latency Transceiver Front-Ends in Industrial Radio Applications
R. Wittmann, R. Teschner, F. Henkel, K. Tittelbach-Helmrich, A. Wolf
Proc. 9. ITG/GMM/GI-Fachtagung Zuverlässigkeit und Entwurf (ZuE 2017), 48 (2017)
This work presents a 12-bit 60 MHz multiplying Nyquist current-steering CMOS digital-to-analog converter (DAC) for the baseband section of wireless transmitter circuits in industrial radio applications. As a specific feature a configurable attenuator circuit is included, which allows gain adjustments down to 0.025% FSR (linear) or down to 0.25dB (logarithmic) steps. The implemented fully differential multiplying architecture utilizes dynamic LSB current scaling, which remarkable  improves the signal-to-noise performance for attenuated baseband signals. The architecture is configurable for a wide set of applications. For the targeted ParSec radio system (Industry 4.0) an oversampling ratio (OSR) of 3 is used in order to reduce the required order of the analog reconstruction filter. In addition, a 7-4-1 segmental structure minimizes area and optimizes the dynamic performance. The basic current cell has been optimized for low glitch operation. The Ffull circuit operates with a single 1.5 V supply. The total power consumption is 60 mW. For attenuator settings from 0 to 12 dB the SINAD value stays close to 70 dB. The worst case glitch energy is less than 2.8 pVs. The active area of the baseband transmitter DAC with 3 12-bit cores (I, Q and 4096-step attenuator) is 0.3 mm² in a 130nm standard CMOS technology.

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