Theoretische Grundlagen der Kommunikationstechnik

Invitation a talk by Dr. Behrooz Makki, Chalmers University of Technology, Gothenburg, Sweden

Time19 July 2016, 11:00 AM  
LocationHFT - Hochfrequenztechnik building, 6th floor, Room HFT-TA 617, Einsteinufer 25, 10587 Berlin  
TitleOn the performance of large-but-finite MIMO systems: HARQ and Scheduling  


We investigate the performance of the multiple-input-multiple-output (MIMO) systems in the presence of a large but finite numbers of antennas at the transmitters and/or receivers. Considering the cases with and without hybrid automatic repeat request (HARQ) feedback, we determine the minimum numbers of the transmit/receive antennas which are required to satisfy different outage probability constraints. Also, with and without interference cancelation, we derive the maximum achievable throughout of the MIMO broadcast channels using optimal scheduling.  Our results are obtained for different fading conditions and the effect of the power amplifiers efficiency/feedback error probability on the performance of the MIMO systems is analyzed. Then, we use some recent results on the achievable rates of finite block-length codes, to analyze the effect of the codewords lengths on the system performance. Moreover, we derive closed-form expressions for the asymptotic performance of the MIMO systems when the number of antennas increases. Our analytical and numerical results show that different quality-of-service requirements can be satisfied with relatively few transmit/receive antennas. 



Behrooz Makki was born in Tehran, Iran. He received the B.Sc. degree in Electrical Engineering from Sharif University of Technology, Tehran, Iran, and the M.Sc. degree in Bioelectric Engineering from Amirkabir University of Technology, Tehran, Iran, respectively. Behrooz received his PhD degree in Communication Engineering from Chalmers University of Technology, Gothenburg, Sweden. Since 2013, he is working as a Postdoc at Chalmers University. Behrooz is the recipient of VR Research Link grant, Sweden, 2014, and the Ericsson's Research grant, Sweden, 2013-2016. Also, he is a member of European Commission 5G project ``mm-Wave based Mobile Radio Access Network for 5G Integrated Communications.'' His current research interests include partial channel state information (CSI) feedback, hybrid automatic repeat request, Green communication, millimeter wave communication, free-space optical communication and finite block-length analysis.