Abstract: The marriage of ever-more sophisticated signal processing and wireless communications has led to compelling ‘tele-presence’ solutions - at the touch of a dialing key... However, the ‘quantum’ leaps both in digital signal processing theory and in its nano-scale based implementation is set to depart from classical physics obeying the well-understood laws revealed by science. We embark on a journey into the weird and wonderful world of quantum physics, where the traveler has to obey the sometimes strange new rules of the quantum world.
Hence we ask the judicious question: can the marriage of applied signal processing and communications be extended beyond the classical world into the quantum world?
The quest for quantum-domain communication solutions was inspired by Feynman's revolutionary idea in 1985: information-bearing bits can be mapped to particles such as photons or to the spin as well as to the charge of electrons for encoding, processing and delivering information.
Against the backdrop of numerous open research questions, this presentation will explore some of the topical problems both in quantum computing-aided as well as in quantum-domain signal processing and communications.
For example, in the quantum computing-aided category of wireless communications, we often encounter large-scale search problems, some of which may be efficiently solved with the aid of either bio-inspired random guided algorithms or by quantum-search techniques. These quantum-search algorithms are potentially capable of searching through an element search space with the aid of cost-function evaluations. Commencing with a brief historical perspective, a variety of efficient quantum-assisted solutions will be exemplified.
By contrast, in the quantum world, the quantum channel may simply be constituted by the deleterious effects of the environmental perturbations corrupting the super-imposed quantum-state of particles representing the quantum-bits. In a philosophical - rather than engineering – context, this may be deemed reminiscent of the Brownian motion of electrons in a ‘Gaussian channel’ corrupting the classic information bits. Hence we will also discuss how the isomorphism of classic and quantum codes may be exploited for mitigating the hostile effects of quantum-decoherence, which results in quantum-bit flips.
Biography: Lajos Hanzo (FREng, FIEEE, FIET, RS Wolfson Fellow) received his 5-year Master degree in electronics from the Technical University of Budapest in 1976, his doctorate in 1983 and his Doctor of Sciences (DSc) degree in 2004. During his career in telecommunications he has held various research and academic posts in Hungary, Germany and the UK. Since 1986 he has been with the School of ECS, University of Southampton, UK, where he holds the Chair in Telecommunications. His current research interests are featured at http://www-mobile.ecs.soton.ac.uk.
Abstract: Caching at the wireless edge has gained a lot of traction in the research community, although it is still at its infancy in terms of applications and products. This tutorial is an attempt to present the recent research in information theory, network coding, and wireless communications, related to caching. In particular, we shall depart form the traditional approach of “dynamic caching policy” and “hit rate maximization”, and focus on the stream of relatively recent papers that have characterized exact capacity and throughput scaling laws for an idealized scenario where the content library is fixed, the cache placement is performed a priori, and the goal consists of delivering the user requests in the shortest possible time. While this framework is clearly an over-simplification, it yields surprisingly clean and elegant optimality results for several network topologies and it is practically motivated by modern on-demand media delivery (streaming), where library and caches update and actual content transmission occur at very different time scales. A special emphasis shall be given to the interplay of edge-caching and physical layer schemes.
Biography: Giuseppe Caire (FIEEE) was born in Torino, Italy, in 1965. He received the B.Sc. in Electrical Engineering from Politecnico di Torino (Italy) in 1990, the M.Sc. in Electrical Engineering from Princeton University in 1992 and the Ph.D. from Politecnico di Torino in 1994. He is currently an Alexander von Humboldt Professor with the Electrical Engineering and Computer Science Department of the Technical University of Berlin, Germany. He has served as Associate Editor for the IEEE Transactions on Communications and the IEEE Transactions on Information Theory. He received the Jack Neubauer Best System Paper Award from the IEEE Vehicular Technology Society in 2003, the IEEE Communications Society & Information Theory Society Joint Paper Award in 2004 and in 2011, the Okawa Research Award in 2006, the Alexander von Humboldt Professorship in 2014, and the Vodafone Innovation Prize in 2015. Giuseppe Caire is a Fellow of IEEE since 2005. He has served in the Board of Governors of the IEEE Information Theory Society from 2004 to 2007, and as officer from 2008 to 2013. He was President of the IEEE Information Theory Society in 2011. His main research interests are in the field of communications theory, information theory, channel and source coding with particular focus on wireless communications.