9:00 - 9:15 Welcome and Introduction
9:15 -10:00 Invited talk by Bruno Clerckx, “Rate Splitting: An Idea Whose Time Has Come”. Presentation slides.
MIMO signal processing plays a central part towards the recent increase in spectral efficiencies of wireless networks. MIMO has grown beyond the original point-to-point channel and nowadays refers to a diverse range of centralized and distributed deployments. The fundamental bottleneck towards enormous spectral efficiencies in multiuser MIMO networks lies in a huge demand for accurate channel state information at the transmitter (CSIT). This has become increasingly difficult to satisfy due to the increasing number of antennas and access points in 5G networks relying on dense heterogeneous networks and transmitters equipped with a large number of antennas. CSIT inaccuracy results in a multi-user interference problem that is the primary bottleneck of MIMO wireless networks. Looking backward, the problem has been to strive to apply techniques designed for perfect CSIT to scenarios with imperfect CSIT. This talk departs from this conventional approach and introduces the audience to a promising strategy based on rate splitting.
Rate splitting relies on the transmission of common (degraded) messages decoded by multiple users, and private (nondegraded) messages decoded by their corresponding users. This bridges two transmission strategies that deal with the extremes of unknown and perfectly known multiuser interference. As a result, multiuser transmission moves away from conventional unicast-only transmission to superimposed unicast multicast transmission. Through information and communication theoretic analysis, rate splitting is shown to provide significant benefits in terms of spectral efficiencies, reliability and CSI feedback overhead reduction over conventional strategies used in LTE-A and exclusively relying on private (unicast) messages. Moreover, the gains of rate splitting will be demonstrated in a wide range of scenarios: multi-user MIMO, massive MIMO, multi-cell MIMO, overloaded systems, Non-Orthogonal Multiple Access (NOMA), multigroup multicasting, mmwave communications, communication with RF impairments and caching. Signal processing and optimization techniques used to achieve the fundamentally promised gains are further presented and elaborated. Open problems and challenges will also be discussed.
Bio: Dr Bruno Clerckx is a Senior Lecturer (Associate Professor) in the Communication and Signal Processing Group, Electrical and Electronic Engineering Department at Imperial College London (London, United Kingdom). He received his M.S. and Ph.D. degree in applied science from the Université catholique de Louvain (Louvain-la-Neuve, Belgium) in 2000 and 2005, respectively. He spent the 1998-1999 academic year at the Katholieke Universiteit Leuven (Leuven, Belgium). In 2006, he was a Post-Doc at the Université catholique de Louvain. From 2006 to 2011, he was with Samsung Electronics (Suwon, South Korea) where he actively contributed to 3GPP LTE/LTE-A and IEEE 802.16m and acted as the rapporteur for the 3GPP Coordinated Multi-Point (CoMP) Study Item. Since 2011, he has been with Imperial College London, first as an Imperial College Lecturer (2011-2015) and now as a Senior Lecturer (2015- ). From 2014 to 2016, he also occupied an Associate Professor position at Korea University, Seoul, Korea. He also held several visiting research positions at Stanford University (CA, USA) [Jan 2003-Aug 2003], EURECOM (Sophia-Antipolis, France) [Oct 2004-Feb 2005], Korea University (Seoul, Korea) [Aug 2014/2015], National University of Singapore - NUS (Singapore) [July 2015] and The University of Hong Kong - HKU (Hong Kong) [April 2016].
10:00 -10:30 Coffee break
10:30 -11:15 Invited talk by Eduard Jorswieck, “Resource Allocation in Heterogeneous interference networks: energy-efficiency, security and latency”. Presentation slides.
Abstract: The fifth and following generation of mobile communications introduce a number of massive requirements in terms of throughput and efficiency, in latency reduction, scalability with number of devices, robustness and resilience, safety and security, as well as heterogeneity. Some important requirements as heterogeneity, efficiency, security are to be achieved by careful modelling and system design. This talk provides an overview of modelling, analysis and design tools for resource allocation and transceiver optimisation in single- and multi-hop heterogeneous interference networks. These tools include multi-objective optimisation, fractional sequential programming, and physical layer security.
Bio: Eduard A. Jorswieck was born in 1975 in Berlin, Germany. He received his Diplom-Ingenieur (M.S.) degree and Doktor-Ingenieur (Ph.D.) degree, both in electrical engineering and computer science from the Technische Universität Berlin, Germany, in 2000 and 2004, respectively. He was with the Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut (HHI) Berlin, in the Broadband Mobile Communication Networks Department from December 2000 to February 2008. From April 2005 until February 2008, he was a lecturer at the Technische Universität Berlin. From February 2006 until February 2008, he worked for the Department of Signals, Sensors and Systems at the Royal Institute of Technology (KTH) as a post-doc and Assistant Professor. Since February 2008, he has been the head of the Chair of Communications Theory and Full Professor at Dresden University of Technology (TUD), Germany. Eduard's main research interests are in the area of signal processing for communications and networks, applied information theory, and communications theory. He has published more than 90 journal papers and some 240 conference papers on these topics. Dr. Jorswieck is senior member of IEEE. He was member of the IEEE SPCOM Technical Committee (2008-2013) and is member of the IEEE SAM TC (since 2015). Since 2011, he acts as Associate Editor for IEEE Transactions on Signal Processing. Since 2008, continuing until 2011, he has served as an Associate Editor for IEEE Signal Processing Letters. Since 2012, continuing until 2013, he was Senior Associate Editor for IEEE Signal Processing Letter. Since 2016, he serves as Associate Editor for IEEE Transactions on Information Forensics and Security. Since 2013, he serves as Associate Editor for IEEE Transactions on Wireless Communications. In 2006, he received the IEEE Signal Processing Society Best Paper Award.
11:15 -12:00 Invited talk by Martin Lerch, “Affordable Mobile Communications Experiments in High Mobility Scenarios”. Presentation slides.
Abstract: Mobile communications experiments in high mobility environments such as high speed trains, motorways or airplanes are expensive, time-consuming and sometimes dangerous or even impossible. Researchers are then often forced to rely on simulations and their underlying models to test new transmission or receiver techniques. Fortunately, such experiments can also be emulated at lower velocities by time-stretching the transmit signals before the transmission and corresponding time compression in the receiver. Considering multicarrier modulation schemes like OFDM or FBMC, there exist different methods to perform the required time-stretching and time-compression to apply this technique. Unfortunately, all these methods are subject to certain limitations. In this talk, i will first compare these methods regarding their applicability in different kinds of experiments and in different scenarios. Then, corresponding testbed measurements and their underlying measurement setup and measurement methodology to test the feasibility of these methods are presented. Finally, the results of real world measurements where these techniques were applied are highlighted.
Bio: Martin Lerch was born in Vienna, Austria in 1978. After attending a technical high school, he studied electrical and communication engineering at TU Wien where he received his master’s degree in 2008. During this time and later, Martin developed several database, Web, and desktop applications before he returned to TU Wien in 2011 to work on the Vienna MIMO Testbed at the Institute of Telecommunications. Martin’s work focuses on the development of new measurement methodologies for static and high mobility mobile communication scenarios.
12:30 -14:30 Lunch break.
A group reservation has been made at Vertex Cafeteria in Campus Nord at 12:30. The cafeteria offers a menu with a choice of four possible starters, four possible main dishes and four desserts for 7.80 €. Vegetarian options are also available. Other less formal cafeterias are also available on campus, like the FIB bar (B6 building) and the Camins Cafeteria (B2 building). Participants will have to cover their lunch cost.
14:30 -17:00 Poster Session
Poster Stands: You are free to print the poster in any format and size you like. Note however that the poster stand is 116cm high by 146cm wide.
- Frequency selective multiuser hybrid precoding for mmWave systems with imperfect channel knowledge, by J. P. González-Coma, N. González- Prelcic, L. Castedo, R. Heath.
- Analog Transmission of Correlated Sources over fading SIMO Multiple Access Channels, by P. Suárez-Casal, O. Fresnedo-Arias, L. Castedo, J. García-Frías.
- Performance Assessment of 5G-Candidate Waveforms in High Speed Scenarios, by T. Domínguez-Bolaño, X. Rodríguez-Piñeiro, J. A. García-Naya, L. Castedo.
- Experimental comparison of coherent and non-coherent SU-MIMO systems, by Jacobo Fanjul, Ignacio Santamaría.
- Machine learning techniques for cooperative spectrum sensing, by Jesús Pérez Arriaga.
- Skew Reed-Solomon codes: Construction and Decoding, by Francisco Javier Lobillo.
- On the Application of Repeated Games Theory in Communicactions, by Juan Parras, Santiago Zazo.
- Matrix completion of noisy graph signals via proximal gradient minimization, by Pere Giménez Febrer, Alba Pagès-Zamora.
- Treating Interference as Noise in the Bursty Interference Channel, Grace Villacrés, Soheil Gherekhloo, Aydin Sezgin.
- A High-SNR Normal Approximation for Single-Antenna Rayleigh Block-Fading Channels, Alejandro Lancho, Tobias Koch and Giuseppe Durisi.
- Zero Forcing Precoding for Multi-User MISO Visible Light Communications, Roser Viñals, Olga Muñoz, Adrián Agustín, Josep Vidal.
- Strategies for expectation propagation (EP) turbo equalization, Irene Santos, Juan José Murillo-Fuentes, Eva Arias-de-Reyna, Pablo M. Olmos.