Short Background

I started my PhD in June 2013, after getting my M.Sc degree in Applied Physics and Electrical Engineering with a specialization in applied mathematics (Teknisk matematik), here in Linköping. I did my master thesis, entitled "Obstacle Detection Using an Ultrasonic Method", at Syncore technologies, where we developed a prototype for detecting people in commercial vehicles.

My Research

My current research involves different aspects of massive MIMO. In particular, I study how the base station can communicate with terminals/users (e.g. a cell phone) without any knowledge of the propagation channel. In this setting, some of the benefits of massive MIMO (such as efficient beamforming) are nonexistent; thus, we have to resort to another way of conveying information to the users. Specifically, I've analyzed how space-time block codes can be used to increase the reliability of this transmission.

In another project, I've studied jamming and physical layer security in massive MIMO. In particular, I've analyzed how a massive MIMO base station, or any other array with enough antennas, can be used as a jammer to hinder communication between two transceivers.


During the spring of 2018, I've been teaching TSKS14 (Multiple Antenna Communications). Courses I've taught previous years include TSKS01 (Digital Communication), TSKS10 (Signals, Information and Communications), TSKS11 (Networks: Models, Algorithms and Applications), TSKS15 (Detection and Estimation of Signals) and TSDT14 (Signal Theory).



Marcus Karlsson, Emil Björnson, Erik G Larsson

Performance of In-Band Transmission of System Information in Massive MIMO Systems

In IEEE Transactions on Wireless Communications

Article in journal


Marcus Karlsson, Emil Björnson, Erik G Larsson

Jamming a TDD Point-to-Point Link Using Reciprocity-Based MIMO

In IEEE Transactions on Information Forensics and Security

Article in journal


Marcus Karlsson

Aspects of Massive MIMO

Licentiate thesis, comprehensive summary



About the division

About the department