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  • Publications 2019

Publications 2019

since January 2019

(1) An Integrated Radar Tile for Digital Beamforming X-/Ka-Band Synthetic Aperture Radar Instruments
E. Arnieri, L. Boccia, G. Amendola, S. Glisic, C. Mao, S. Gao, T. Rommel, P. Penkala, M. Krstic, U. Yodprasit, A. Ho, O. Schrape, M. Younis
IEEE Transactions on Microwave Theory and Techniques 67(3), 1197 (2019)

(2) 100 Gbit/s End-to-End Communication: Adding Flexibility with Protocol Templates
S. Büchner, A. Hasani, J. Nolte, L. Lopacinski, R. Kraemer
Proc. 43rd IEEE Conference on Local Computer Networks (LCN), (2018)

(3) Secret Key Generation Based on Channel State Information in a mmWave Communication System
N. Felkaroski, M. Petri
Proc. 12th International Conference on Systems, Communications and Coding (SCC 2019), 285 (2019)
(fast secure)

(4) Next-Cell Prediction Based on User’s Long-Term Cell Sequence History and Current-Cell Trajectory
M. Goodarzi, V. Sark, N. Maletic, J. Gutierrez Teran, E. Grass
Proc. 22nd Conference on Innovation in Clouds, Internet and Networks (ICIN 2019), 257 (2019)

(5) An Integrated VCO With Frequency Tripler in SiGe BiCMOS with a 1-dB Bandwidth from 22GHz to 32GHz for Multiband 5G Wireless Networks
F. Herzel, G. Panic, J. Borngräber, D. Kissinger
Proc. 12th German Microwave Conference (GeMIC 2019), 99 (2019)
(fast spot)

(6) Sono-Teleconsulting
St. Ortmann, A. Haddadi Esfahani, Ch.Wenger, V. Frauendorf, D. Nürnberg
Proc. 1. digilog-Kongress 2019, 114 (2019)

(7) Sequential Channel Equalization in Strong Line-of-Sight MIMO Communication
X. Song, D. Cvetkovski, W. Rave, E. Grass, G. Fettweis
IEEE Transactions on Wireless Communications 18(1), 340 (2019)
In this paper, we show a novel algorithm for strong line-of-sight (LoS) multiple-input-multiple-output (MIMO) channel equalization. With optimally spaced antennas under specific arrangements, the LoS channels can be made spatially orthogonal. In practice, antenna displacements are expected. Conventional algorithms like zero-forcing (ZF) do not consider the special properties of the LoS MIMO channel and result in high complexity. We show that the LoS MIMO channel can be factorized into a product of three matrices. Thereby, the two diagonal matrices at the outer product positions are the most varying terms and should be compensated dynamically. Being a good tradeoff between complexity and robustness, the proposed sequential channel equalization is applied in a reverse order of the factorization. The algorithm can be applied to LoS MIMO systems with uniform linear or rectangular arrays, which are making use of digital or analog equalization. By considering the usage of the Winograd butterfly and Butler matrices, the number of multiplications in both digital and analog implementations of the proposed solution is increasing approximately linearly with respect to the number of antennas, while the complexity of the state-of-the-art designs grows quadratically. As found numerically and verified experimentally, the proposed method performs nearly as well as the ZF-based algorithms with near-optimal arrangements, while having significantly lower complexity.

(8) Noise Performance of Orthogonal RF Beamforming for THz Radio Communications
K.K. Tiwari, E. Grass, R. Kraemer
Proc. IEEE Computing and Communication Workshop and Conference (IEEE CCWC 2019), 793 (2019)
Ultra wide-band terahertz (THz) radio links are envisaged for high throughput and low latency radio communication from server to virtual reality (VR) head mounted display (HMD). Orthogonal radio frequency (RF) beamforming is suitable for such extremely high frequency radio links owing to the propagation characteristics. For RF beam training, the transmit-receive (Tx-Rx) beam combination yielding maximum received signal strength indication (RSSI) is selected. For typical complex signals employed in IQ architecture receivers,  RSSI is Rayleigh distributed. Receiver noise can cause false beam selections manifesting in communication rate loss. In this paper, analytically derived closed-form expressions and preliminary Monte Carlo (MC) simulation results for such noise performance evaluation have been presented.

(9) ParSec: Ein innovatives Funksystem für die Fertigungsautomation
L. Underberg, R. Kraemer, J. von Hoyningen-Huene, R. Kays
at - Automatisierungstechnik 67, 29 (2019)

(10) Securing Over-the-Air Code Updates in Wireless Sensor Networks
Ch. Wittke, K. Lehniger, St. Weidling, M. Schölzel
Harnessing the Internet of Everything (IoE) for Accelerated Innovation Opportunities, 1st Edition, Editors: P.J.S. Cardoso, J. Monteiro, J. Semião, J.M.F. Rodrigues, Chapter 13. Securing Over-the-Air Code Updates in Wireless Sensor Networks, IGI Global, 302 (2019) 
With the growing number of wireless devices in the IoT, maintenance and management of these devices becomes a key issue. In particular, the capability for wireless code updates is a must in order to fix security issues, software bugs, and extend firmware functionality in the field. Thereby, code update mechanisms in WSNs have to deal with limited resources. On top of that, the capability of wireless code updates also opens new security vulnerabilities. The chapter presents a general overview about various approaches for OTA code update techniques for WSNs. Distribution protocols as well as techniques for improving the reliability of these updates are presented, too. Based on this overview about existing OTA techniques their security flaws are presented along with some existing attacks and possible countermeasures. Therefore, a classification of security threats is presented and which of them can be used more easily with code update functionality. Finally the state of the art countermeasures are presented and compared if they secure the mentioned weakened security objectives.

(11) Horizontal DEMA Attack as the Criterion to Select the Best Suitable EM Probe
Ch. Wittke, I. Kabin, D. Klann, Z. Dyka, A. Datsuk, P. Langendörfer
über: http://eprint.iacr.org/
(Total Resilience)
Implementing cryptographic algorithms in a tamper resistant way is an extremely complex task as the algorithm used and the target platform have a significant impact on the potential leakage of the implementation. In addition the quality of the tools used for the attacks is of importance. In order to evaluate the resistance of a certain design against electromagnetic emanation attacks – as a highly relevant type of attacks – we discuss the quality of different electromagnetic (EM) probes as attack tools. In this paper we propose to use the results of horizontal attacks for comparison of measurement setup and for determining the best suitable instruments for measurements. We performed horizontal differential electromagnetic analysis (DEMA) attacks against our ECC design that is an im-plementation of the Montgomery kP algorithm for the NIST elliptic curve B-233. We experimented with 7 different EM probes under same conditions: attacked FPGA, design, inputs, measurement point and measurement equipment were the same, excepting EM probes. The used EM probe influences the success rate of performed attack significantly. We used this fact for the comparison of probes and for determining the best suitable one.

The building and the infrastructure of the IHP were funded by the European Regional Development Fund of the European Union, funds of the Federal Government and also funds of the Federal State of Brandenburg.