Indoor MIMO Channel Characterization for 5G Communication Systems

Friday Seminar
Date and time: September 07, 2018 2:30 PM - 4:00 PM
Place: EIT Digital Open Area, Floor 3, Elevator C, Electrum Kista
Speaker: Professor Michael Jensen, BYU


Indoor MIMO Channel Characterization for 5G Communication Systems

Michael A. Jensen

Brigham Young University

The dramatic increase in both the number of wireless devices operating in the UHF and microwave bands and the data rates required by emerging applications has put significant pressure on the spectrum available to support user demand for wireless data. As a result, the community has looked to upper microwave and millimeter-wave bands, where larger spectral bandwidths are available, to support wireless services. A large number of studies have explored experimentally and theoretically the propagation characteristics near 60 GHz, with the key finding that line-of-sight (LOS) communication scenarios are required for reliable operation. Given that mobile devices often need to work reliably in non-LOS (NLOS) conditions, recent research has turned to frequencies in the 15-38 GHz range that may offer more favorable propagation conditions as well as lower device costs. This talk reports on 4×4 multiple-input multiple-output (MIMO) propagation channel measurements at 24 GHz in two university buildings and compares the results to co-located measurements at 2.55 GHz. The results show similar link gains at the two frequencies in hallways and connected classrooms but higher path loss at 24 GHz when strictly NLOS conditions exist. The MIMO capacity for the two frequencies is also similar, suggesting sufficient multipath richness to support spatial multiplexing at 24 GHz. Comparisons with ray-tracing simulations reinforce the measured results and demonstrate the need for careful material characterization at 24 GHz to enable better simulation reliability at upper microwave bands.

Author Bio

Michael Jensen received the B.S. and M.S. degrees in Electrical Engineering from Brigham Young University (BYU) in 1990 and 1991, respectively, and the Ph.D. in Electrical Engineering from the University of California, Los Angeles in 1994. Since 1994, he has been a member of the faculty at BYU where he is currently a Distinguished University Professor of Electrical and Computer Engineering and the Dean of the Ira A. Fulton College of Engineering. He has published 285 articles and book chapters on the topics of antennas, propagation, and signal processing for wireless communication, with emphasis on multi-antenna communication systems. He has been recipient of the Best Student Paper Award at the IEEE Antennas and Propagation Society Symposium in 1993, the H. A. Wheeler Applications Prize Paper Award in the IEEE Transactions on Antennas and Propagation in 2002, and several outstanding faculty awards at Brigham Young University. He was elevated to the grade of IEEE Fellow in 2008. He is past President of the IEEE Antennas and Propagation Society and has previously served as the Editor-in-Chief of the IEEE Transactions on Antennas and Propagation.

Coffee and cake will be served, Registration not required.

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