2017

State: 8.4.2019

[1] Thorsten Bayer

Transceiverkonzepte für LOS MIMO Systeme unter dem Einfluss meteorologisch bedingter Kanalstörungen

Masterarbeit an der Universität der Bundeswehr, München, 2017.

[2] Steffen Büchner, Lukasz Lopacinski, Rolf Kraemer and Jörg Nolte

Protocol Processing for 100 Gbit/s and Beyond - A Soft Real-Time Approach In Hardware and Software

FREQUENZ, De Gruyter, vol. 71, issue 9-10, pp. 427-438, ISSN: 0016-1136, e-ISSN: 2191-6349, DOI: 10.1515/freq-2017-0152, 2017.

Keywords: 100 Gbit/s End-to-End; soft real-time stream processing; 100 Gbit/s wireless communication; End2End100

Abstract: 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.

[3] C. Carlowitz and M. Vossiek

Demonstration of an Efficient High Speed Communication Link Based on Regenerative Sampling

In Proc. International Microwave Symposium (IMS 2017), Honolulu, Hawaii, USA, June, 2017.

[4] Christian Carlowitz, Thomas Girg, Hatem Ghaleb and Xuan-Quang Du

Efficient Ultra-High Speed Communication with Simultaneous Phase and Amplitude Regenerative Sampling (SPARS)

FREQUENZ, De Gruyter, vol. 71, issue 9-10, pp. 449-461, ISSN: 0016-1136, e-ISSN: 2191-6349, DOI: 10.1515/freq-2017-0163, 2017.

Keywords: front-end circuits and systems, wireless RF components and systems, high-data-rate communications, superregenerative receivers

Abstract: For ultra-high speed communication systems at high center frequencies above 100 GHz, we propose a disruptive change in system architecture to address major issues regarding large amplifier chains with high noise figure and high power consumption when operating close to the frequency limits of the underlying semiconductor technologies. Instead of scaling a classic homodyne transceiver system, we employ repeated amplification in single-stage amplifiers through positive feedback as well as synthesizer-free self-mixing demodulation at the receiver to simplify the system architecture notably. As soon as gain is no longer the most prominent issue, relaxed requirements for all the other major components allow reconsidering their implementation concepts to achieve further improvements compared to classic systems. This paper provides the first comprehensive overview of all major design aspects that need to be addressed upon realizing a SPARS-based transceiver. At system level, it is shown how high data rates and a noise performance comparable to classic systems can be achieved, backed by scaled demonstrator experiments. Regarding the transmitter, design considerations for efficient quadrature modulation are discussed. For the frontends that replace PA and LNA amplifier chains, implementation techniques for regenerative sampling circuits based on super-regenerative oscillators are presented. Finally, an analog-to-digital converter with outstanding performance and complete interfaces both to the analog baseband as well as to the digital side completes the set of building blocks for efficient ultra-high speed communication.

[5] Darko Cvetkovski; Tim Hälsig; Berthold Lankl; Eckhard Grass

Hardware-in-the-loop demonstration of a 60GHz line-of-sight 2×2 MIMO link

In Proc. IEEE 17th International Conference on Smart Technologies (EUROCON 2017), pp. 631-636, Ohrid, Macedonia, July, 2017.DOI: 10.1109/EUROCON.2017.8011188

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[6] N. Doose, P. A. Hoeher

On the Performance of High-Rate LDPC Codes with Low-Resolution Analog-to-Digital Conversion

In Proc. IEEE Vehicular Technology Conference (VTC Fall), Toronto, Canada, Sep., 2017.

[7] N. Doose and P. A. Hoeher

Joint precoding and power control for EIRP-limited MIMO systems

IEEE Transactions on Wireless Communications, DOI: 10.1109/TWC.2017.2785220, 2017.

[8] H. Ghaleb, P. V. Testa, S. Schumann, C. Carta, and F. Ellinger

A 160 - GHz Switched Injection - Locked Oscillator for Phase and Amplitude Regenerative Sampling

IEEE Microwave Wireless and Component Letters (MWCL), vol. 27, issue 9, DOI: 10.1109/LMWC.2017.2734741, 2017.

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[9] H. Ghaleb, M. El-Shennawy, C. Carta, and F. Ellinger,

A 148 GHz Regenerative Sampling Oscillator

In Proc. European Microwave Week 2017 (EuMIC 2017), Nuremberg, Germany, October, 2017.

[10] H. Ghaleb, M. El-Shennawy, U. Jorges, C. Carta, and F. Ellinger

Nonlinear modeling of cross-coupled regenerative sampling oscillators

In Proc. 2017 13th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME 2017), Giardini Naxos - Taormina, Italy, June, 2017.

[11] H. Ghaleb, G. Belfiore, C. Carta, and F. Ellinger

A SiGe HBT Limiting Amplifier for Fast Switching of mm-Wave Super-Regenerative Oscillators

In Proc. 30th Symposium on Integrated Circuits and Systems Design (SBCCI 2017), Fortaleza, Brazil, 2017.

[12] Malte Giese, Sönke Vehring, Georg Böck and Arne F. Jacob

Dual-Polarized Antenna Arrays with CMOS Power Amplifiers for SiP Integration at W-Band

FREQUENZ, De Gruyter, vol. 71, issue 9-10, pp. 463-472, ISSN: 0016-1136, e-ISSN: 2191-6349, DOI: 10.1515/freq-2017-0162, 2017.

Keywords: Antenna arrays, CMOS integrated circuits, millimeter wave communication, stereolithography, polarization multiplex, power amplifiers

Abstract: This paper presents requirements and frontend solutions for low-cost communication systems with data rates of 100 Gbit/s. Link budget analysises in different mass-market applications are conducted for that purpose. It proposes an implementation of the front-end as an active antenna array with support for beam steering and polarization multiplexing over the full W-band. The critical system components are investigated and presented. This applies to a transformer coupled power amplifier (PA) in 40 nm bulk CMOS. It shows saturated output power of more than 10 dBm and power-added-efficiency of more than 10% over the full W-band. Furthermore, the performance of microstrip-to-waveguide transitions is shown exemplarily as an important part of the active antenna as it interfaces active circuitry and antenna in a polymerand- metal process. The transition test design shows less than 0.9 dB insertion loss and more than 12 dB return loss for the differential transition over the full W-band.

[13] T. Hälsig and B. Lankl

Spatial Oversampling in LOS MIMO Systems with 1-Bit Quantization at the Receiver

In Proc. 11th International ITG Conference on Systems, Communications and Coding (SCC 2017), Hamburg, Germany, February, 2017.

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[14] T. Hälsig, D. Cvetkovski, E. Grass, and B. Lankl

Measurement Results for Millimeter Wave pure LOS MIMO Channels

In Proc. IEEE Wireless Communications and Networking Conference (WCNC 2017), San Francisco, CA, USA, Mar, 2017.

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[15] Maria Freire Hermelo, Rattana Chuenchom, Vitaly Rymanov, Thomas Kaiser, Fawad Sheikh, Andreas Czylwik, and Andreas Stöhr

Photonic-Assisted mm-Wave and THz Wireless Transmission towards 100 Gbit/s Data Rate

FREQUENZ, De Gruyter, vol. 71, issue 9-10, pp. 485-497, ISSN: 0016-1136, e-ISSN: 2191-6349, DOI: 10.1515/freq-2017-0147, 2017.

Keywords: 100 Gbit/s wireless; 42.79.-e Optical elements, devices and systems; fiber optics communications; radio frequency photonics; optoelectronics; wireless communications

Abstract: This paper presents photonic-assisted 60 GHz mm-wave and 325 GHz system approaches that enable the transmission of spectral-efficient and high data rate signals over fiber and over air. First, we focus on generic channel characteristics within the mm-wave 60 GHz band and at the THz band around 325 GHz. Next, for generating the high data rate baseband signals, we present a technical solution for constructing an extreme bandwidth AWG. We then report the development of a novel coherent photonic mixer (CPX) module for direct optic-to-RF conversion of extreme wideband optical signals, with a >5 dB higher conversion gain compared to conventional photodiodes. Finally, we experiment-tally demonstrate record spectral efficient wireless transmission for both bands. The achieved spectral efficiencies reach 10 bit/s/Hz for the 60 GHz band and 6 bit/s/Hz for the 325 GHz band. The maximum data rate transmitted at THz frequencies in the 325 GHz band is 59 Gbit/s using a 64-QAM-OFDM modulation format and a 10 GHz wide data signal.

[16] P. A. Hoeher, D. Manteuffel, N. Doose and N. Peitzmeier

Ultra-Wideband Massive MIMO Communications Using Multi-Mode Antennas

FREQUENZ, De Gruyter, vol. 71, issue 9-10, pp. 439-448, ISSN: 0016-1136, e-ISSN: 2191-6349, DOI: 10.1515/freq-2017-0148, 2017.

Keywords: Multi-mode antennas, ultra-wideband communications, baseband processing, massive MIMO

Abstract: An ultra-wideband system design is presented which supports wireless internet access and similar shortrange applications with data rates of the order of 100 Gbps. Unlike concurrent work exploring the 60 GHz regime and beyond for this purpose, our focus is on the 6.0–8.5 GHz frequency band. Hence, a bandwidth efficiency of about 50 bps/Hz is necessary. This sophisticated goal is targeted by employing two key enabling techniques: massive MIMO communications in conjunction with multi-mode antennas. This concept is suitable both for small-scale terminals like smartphones, as well as for powerful access points. Compared to millimeter wave and THz band communications, the 6.0–8.5 GHz frequency band offers more robustness in NLOS scenarios and is more mature with respect to system components.

[17] Rolf Kraemer

Wireless 100 Gb/s and beyond: Actual Research Approaches within a DFG Special Priority Program (SPP1655)

IEEE 802 Plenary Session, 9.-14. July 2017, Berlin, Germany.

Abstract: The talk will give an introduction and overview of the SPP1655 challenges and the projects. Especially bandwidth efficiency as a trade-off for technology selection will be discussed. Moreover, a discussion of analog versus digital signal processing will be conducted. Some information about protocol engines for the MAC and LLC layers will be provided.

[18] Rolf Kraemer

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

FREQUENZ, De Gruyter, vol. 71, issue 9-10, pp. 363-377, ISSN: 0016-1136, e-ISSN: 2191-6349, DOI: 10.1515/freq-2017-0178, 2017.

Keywords: SPP1655; challenges and approaches; Analog signal processing; bandwidth efficiency

Abstract: 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.

[19] Rolf Kraemer

Challenges and potential solutions for wirelss 100Gb/s communication systems