RCC Seminar Series

The IEEE Radio Communications Committee launches a series of online seminars from July 2021, which will give great opportunities to learn the recent outcomes on trending topics from outstanding researchers. The duration of each seminar is 35-40 minutes plus Q&A.

The IEEE RCC Special Interest Group on Terahertz Communications (RCC-SIG THz) also launched a series of online seminars focused on Terahertz Communications. For more information please visit the RCC-SIG THz website.

IEEE ComSoc RCC Seminar 1

Speaker: Prof. Mark F. Flanagan (University College Dublin)
Title: Optimization of the Achievable Rate for MIMO Systems Assisted by Reconfigurable Intelligent Surfaces
Abstract: Reconfigurable intelligent surfaces (RISs) represent a new technology that can shape the radio wave propagation in wireless networks and offers a variety of potential performance and implementation gains. In this talk, we will present some recent results on the optimization of the achievable rate for MIMO systems assisted by RISs. We will show that in this setting, optimization via the projected gradient method (PGM) can achieve the same achievable rate as alternating optimization (AO), but with a significantly lower computational complexity. We introduce a new metric which can serve as a first-order measure of the applicability of an RIS in a MIMO communication scenario. In addition, we demonstrate that the deployment of an RIS is particularly suitable to increase the achievable rate in indoor environments, as even a relatively small number of RIS elements can provide a substantial achievable rate gain. The talk will also cover the optimization of the achievable sum-rate for RIS-assisted multiuser MIMO communications, as well as rate optimization for the case of discrete signaling (finite-sized constellation) at the transmitter.
When: July 8, 2021, at 11am Eastern Time (4pm London time and 11pm CST).

Slides are available at this link.

IEEE ComSoc RCC Seminar 2

Speaker: Prof. Emil Björnson (KTH & Linköping University)
Title: Wireless Communications with Physically Large Antenna Arrays
Abstract: The early 5G deployments are almost exclusively based on “Massive MIMO” technology, where each base station has an array with many antenna-integrated radios. This is a great achievement for a technology concept that, ten years ago‚ was generally believed to be too bulky, overly power hungry, and only useful in niche scenarios. Despite the word “massive”, 5G base stations are physically small from the user’s viewpoint. What if we would build truly physically large antenna arrays in the future? In this plenary, we take a look at the benefits of such large antenna arrays can for future wireless communication systems. In particular, we will discover how the near-field effects experienced when using large arrays can be much different and more commonly occurring than the near-field effects of individual antennas. These new insights are useful when designing various future technologies, such as Reconfigurable Intelligent Surfaces and Holographic MIMO.
When: Oct. 1, 2021, at 7am Pacific Time (3pm in London, 10pm in Beijing).