Workshops and Short Courses

The demand for ever higher data rates is driving research for broadband wireless communications to data rates of 100 Gbit/s and beyond. This workshop presents research work on 100 Gbit/s wireless communications that uses carrier frequencies beyond 200 GHz with bandwidths of 20 GHz or more and moderate spectral efficiencies. Various wireless system and component design aspects are covered including mm-wave antenna design, MMIC radio design, broadband analog and digital baseband signal processing, as well as high-data rate protocol processing. The speakers are recognized researchers in their fields. All are actively involved in research on 100 Gb/s wireless communications and related fields and work together in the Priority Program of the Deutsche Forschungsgemeinschaft (DFG) SPP 165 “Wireless 100 Gb/s and Beyond”. Presentations of six speakers will address challenges and solutions for high data-rate wireless communication systems from the perspectives of the overall system as well as the system components in the RF, analog and digital domain. The workshop will close with an interactive panel. The participants will have the possibility to submit questions in written form during the workshop which will then be jointly addressed in the interactive panel. Some samples of the research work such as e.g. antennas, MMICs or modules will be shown. The proposed workshop addresses an emerging technology that is of strong interest to the microwave community. It is currently investigated by various research groups around the world and is gaining attention by standardization organizations and industry. Programme 9:00 09:10 Welcome 9:10 09:40 Ultra High Speed Wireless Transmission: Quo Vadis ? Rolf Kraemer, IHP GmbH, Frankfurt (Oder), Germany  Abstract 9:40 10:10 Integration of antennas into low-cost millimeter-wave transceivers Thomas Zwick, Karlsruhe Institute of Technology, Germany  Abstract 10:10 10:40 Wideband IQ transmitter (Tx) and receiver (Rx) components towards 100 Gbit/s communication Ullrich Pfeiffer, University of Wuppertal, Germany  Abstract 10:40 11:20 Coffee Break 11:20 11:50 MMIC-based wireless communication frontends operating at up to 100 Gbps Ingmar Kallfass, University of Stuttgart, Germany  Abstract 11:50 12:20 Mixed-Signal Baseband Processing for 100 Gbit/s Communications J. Christoph Scheytt, University of Paderborn, Germany  Abstract 12:20 12:50 A Parallel Protocol Processing Framework for Ultra High-Speeed Wireless Communication Jörg Nolte, Brandenburg Technical University, Germany  Abstract 12:50 13:00 Discussion WORKSHOPS AND SHORT COURSES 9:10 09:40 Ultra High Speed Wireless Transmission: Quo Vadis ? Rolf Kraemer, IHP GmbH, Frankfurt (Oder), Germany Abstract The talk will address the challenges and approaches of ultra-high speed wireless communication. It will raise the basic questions towards bandwidth efficiency and Bandwidth and the corresponding question of the carrier frequencies available. Moreover it will discuss the possible shift towards more analog signal processing due to the very high efficient analog signal processing nature. A short overview of achieved results will be presented as well. 9:40 10:10 Integration of antennas into low-cost millimeterwave transceivers Thomas Zwick, Karlsruhe Institute of Technology, Germany Abstract In this part of the workshop the realization of mm-wave antennas and integration together with the semiconductor transceiver IC into a low-cost package is presented. Targeted applications are >100 Gbit/s wireless communication systems but also fully integrated radar sensors. Different antenna design approaches are presented depending on the requirements of the mm-wave system. Off-chip and on-chip antennas with high efficiencies and bandwidths from several GHz to several tens of GHz are presented. The mm-wave interconnect for the off-chip antennas is considered in detail and also shows the limitations of such solutions. Since on-chip antennas have to deal with the excitation of surface-waves in the high permittivity semiconductor substrates different design strategies for preventing their excitation are presented. Finally, the advantages and drawbacks of on-chip and off-chip antenna solutions is presented. 10:10 10:40 Wideband IQ transmitter (Tx) and receiver (Rx) components towards 100 Gbit/s communication Ullrich Pfeiffer, University of Wuppertal, Germany Abstract This talk will present results of a fully-integrated wideband IQ transmitter (Tx) and receiver (Rx) chipset centered at 240 GHz for data transmission towards 100 Gbit/s. The circuits are implemented in a low-cost 0.13um SiGe BiCMOS technology with fT/fmax of 300/450 GHz. A lens antenna system consisting of a wideband on-chip antenna and an external exchangable silicon lens gives the required flexibility of using it for different ranges. Based on the link-budget requirement, external lens of different size can be mounted to change the overall directivity. The Tx peak Psat and the EIRP at 236 GHz are -4.4 dBm and 21.86 dBm respectively and the 3-dB bandwidth is 18 GHz. For the Rx, the peak conversion gain and the minimum SSB NF at 236 GHz are 10.5 dB and 15 dB respectively and the 3-dB bandwidth is 15 GHz. The usable RF link bandwidth for this chipset is 65 GHz (SNR>10 dB available from 210-275 GHz) and the 6-dB link bandwidth is 17 GHz. 11:20 11:50 MMIC-based wireless communication frontends operating at up to 100 Gbps Ingmar Kallfass, University of Stuttgart, Germany Abstract Fixed wireless links operating in E-Band and at 240 GHz allow to carry out singleinput single-output data transmission with up to 100 Gbit/s. A point-to-point outdoor experiment at 240 GHz achieves a data rate of 64 Gbit/s over a transmission distance of 850 m using QPSK and 8PSK modulation. For medium range applications up to 100 m, data rates of 96 Gbit/s have been demonstrated. In combination with an optical transmitter, a data rate of 100 Gbit/s was achieved. In E-Band, the use of complex modulation formats allows for data rates up to 60 Gbit/s. This workshop contribution presents the current systems, discusses their limitations, and highlights some of the prospective and required developments for further performance improvements. 11:50 12:20 Mixed-Signal Baseband Processing for 100 Gbit/s Communications J. Christoph Scheytt, University of Paderborn, Germany Abstract Energy-efficient baseband processing becomes very challenging at baseband signal bandwidths in the range of 20 GHz and more. Not only high-speed data converters with sampling rates of 20 to 40 GSps are needed but in addition the subsequent digital signal processing will require multiple-TFLOP processors to perform such tasks as synchronisation, equalization, decoding rsp. coding. Compared to digital signal processing, analog signal processing is inherently power and hardware-efficient. This talk discusses how the analog-to-digital boundary in the baseband processor can be shifted to achieve lower-power and more hardware-efficient signal processing. Furthermore research on a mixedsignal 100 Gbits/s baseband signal processor using Parallel-Spread-SpectrumSequencing (PSSS) in combination with predominantly analog signal processing is presented. 12:20 12:50 A Parallel Protocol Processing Framework for Ultra High-Speeed Wireless Communication Jörg Nolte, Brandenburg Technical University, Germany Abstract Tremendous data-rates of 100Gbit/s and beyond can only be handled with parallel processing on all levels. For performance reasons most of the protocol processing has to take place within the NIC. NICs with embedded low-power many-cores are able to provide the required parallel computing power. In this talk we will present a parallel stream processing framework that allows the construction of parallel protocol processing engines for such kind of devices.