Lajos Hanzo-wcsp2014

Professor Lajos Hanzo
ECS, Faculty of Physical Sciences and Engineering
University of Southampton

Title: A Stroll with Shannon along Massive MIMO Avenue to Next-Generation Plaza

Abstract:

The quantum-leaps predicted by Moor’s law brought about the wireless revolution of the past three decades - but how can we sustain this pace of development, Dr Moore?

The spectacular success of MIMO systems may be attributed to the fact that the MIMO capacity increases linearly with the number of transmit antennas, provided that the number of receive antennas is equal to the number of transmit antennas. With the further proviso that the total transmit power is increased proportionately to the number of transmit antennas, a linear - rather than logarithmic - capacity increase is achieved upon increasing the transmit power

“But Dr Shannon - how can we approach this vast capacity potential in practice?”

The list of practical limitations is daunting...

• How can we physically accommodate a large number of antennas on a compact mobile device, especially multiple RF chains?

• How do we circumvent or harness the signal correlation of the closely-spaced antennas?

• How do we estimate the huge number of MIMO-links?

• What is the pilot-overhead and complexity-overhead of estimating numerous MIMO-links? Is pilot-symbol assisted coding an attractive design option?

• Is there a way round high-complexity coherent detection at all in the context of large-scale MIMO systems?

• Could the radical parallel computing capability of quantum communications be invoked for mitigating the complexity imposed?

• Or is non-coherent multiple-symbol sphere-detection a realistic design alternative, which dispenses with channel estimation?

• How do we best exploit the spatial domain at all, when creating large-scale multi-functional antenna arrays?

Many of the above-mentioned design-dilemmas and limitations might be circumvented wiht the aid of Spatial Modulation (SM), where only a single one of the transmit antennas is activated during any symbol interval. This ’win-win saga’ continues, since apart from the potential benefit of requiring only a single RF chain, SM also has the potential of implicitly conveying extra bits by inferring say log2(M) bits from the specific index of the activated transmit antenna, as discussed in Spatial Modulation for Generalized MIMO: Challenges, Opportunities, and Implementation and A universal space-time architecture for multiple-antenna aided systems

Biography:

Lajos Hanzo received the Dipl. Ing. degree in electronics in 1976 and the Ph.D. degree 1983,both from the Technical University of Budapest, Hungary.During his 24-year career intelecommunication he has held various research and academic posts in Hungary, Germany, and the U.K. Since 1986, he has been with the Department of Electronics and Computer Science, University of Southampton, U.K., and has been a Consultant to Multiple Access Communications Ltd., U.K. Currently, he holds the chair in Telecommunications. He coauthored five books onmobile radio communications, published over 300 research papers, organized and chaired conference sessions, presented overview lectures and was awarded a number of distinctions. Currently, he is managing a research team working on a range of research projects in the field of wireless multimedia communications under the auspices of the Engineering and Physical Sciences Research Council (EPSRC) U.K, the European IST Program and the Mobile Virtual Center of Excellence (VCE). He also provides a range industrial training courses.