Over-the-Air Testing of Multi-Antenna Systems

Lecturer: 
Dr. Wei Fan
Lecturer's institute: 
Aalborg University
Date: 
9.12.2019 08:15 to 11.12.2019 11:00

Abstract

Multi-antenna systems have been widely adopted in wireless communication. Performance testing of multi-antenna radios under realistic propagation scenarios is essential. Over-the-air (OTA) testing, where the device under test is connected to the test instrument via radio waves, has been gaining its importance both in 4G and upcoming 5G systems. In this course, the objective is to introduce the basic concept, theoretical and experimental aspects of OTA testing. Main contents of the course include basics of multi-antenna techniques, basics of radio propagation, basics of antenna, over-the-air testing of single antenna systems (SISO OTA), over-the-air testing of multi-antenna systems (MIMO OTA). The focus of the course is on OTA testing on multi-antenna systems under fading channel conditions. RF and antenna performance evaluations will be discussed briefly. As well as design aspects of OTA setups such as the range length and requirements on OTA probe antennas.

Contents

  • Antenna basics (Monday)
    • multi-antenna techniques
  • Radio channel basics (Monday)
    • sounding, estimation, modelling
  • Antenna measurements (Monday)
    • basics of passive measurements
    • plane wave generation, near/far field
    • SISO OTA, array calibration
  • Multi-antenna OTA (Tuesday)
    • conducted emulation
    • multi-probe anechoic chamber method
    • radiated two stage / wireless cable method
    • reverberation chamber
  • MIMO OTA for 5G radios (Tuesday)
    • applicability of existing methods
    • state of the art & standardization
  • Beamforming measurements (Wednesday)
    • electrical beam steering and implementation
    • OTA measurements with beam steering, repeatability
    • EMC chamber vs. outdoor measurements
    • laboratory visit

Facts

Lecturer: Assistant prof. Wei Fan, Aalborg University, Denmark

                 Marko Leinonen, CWC, University of Oulu, Finland

Host: Pekka Kyösti, Markus Berg (CWC)

Location: University of Oulu

Mon 9.12.

Tue 10.12.

Wed 11.12.

8:15-11:00 SÄ126

8:15-11:00 IT138

8:15-10:00 PR119

11:00-12:00 lunch

11:00-12:00 lunch

10:00-11:00 EMC lab

12:00-15:15 TS128

12:00-15:15 IT113

 

 

Credits: ~2 ECT (to be confirmed) for active participation and passed exam. The exam date will be confirmed later.

There is limited space in lecture rooms. To confirm your seat, please register by 4 December 2019 at https://link.webropolsurveys.com/S/BE2978954DFCB85D. Attendees from both academia and industry are welcome!

Recommended reading: 1) C. Balanis: Antenna theory analysis and design, chapter 2 [antenna fundamental], 2) A. Molisch: Wireless communications [channel modelling], 3) 3GPP TR 37.977 [OTA testing], 4) 3GPP TR 38.901 [channel modelling], 5) P. Kyösti, T. Jämsä, and J-P. Nuutinen, “Channel Modelling for Multiprobe Over-the-Air MIMO Testing,” International Journal of Antennas and Propagation, vol. 2012 [OTA testing].

 

Short Biographies

Dr. Wei Fan received the B.E. degree from the Harbin Institute of Technology, Harbin, China, in 2009, the master’s degree (Hons.) from the Politecnico di Torino, Turin, Italy, the master’s degree (Hons.) from the Grenoble Institute of Technology, Grenoble, France, in 2011, and the Ph.D. degree from Aalborg University, Aalborg, Denmark, in 2014. In 2011, he was with Intel Mobile Communications, Aalborg, as a Research Intern. He conducted a three-month internship at Keysight technologies (Anite Telecoms Oy), Oulu, Finland, in 2014. He is currently an Associate Professor with the Antennas, Propagation and Millimeter-Wave Systems Section, Aalborg University. His current research interests include over-the-air testing of multiple antenna systems, radio-channel sounding, modelling, and emulation.

Marko Leinonen received his MSc and Licentiate in Technology degrees in electrical engineering from the University of Oulu, Finland, in 1996 and 2002, respectively. From 1994 to 2012 he was with Nokia Mobile Phones, Oulu, Finland, working in various positions with radio engineering and technology management. From 2006 to 2007, he was a senior engineering manager in Bangalore, India. From 2012 to 2016, he was a master developer with Ericsson, Oulu, Finland. Since 2017, he has been with the Centre for Wireless Communications, University of Oulu, Oulu, Finland, where he is currently a project manager. His research interests include wireless radio systems and quality topics in radio engineering. He holds more than 30 granted international patent families concentrating on radio engineering.

Last updated: 4.11.2019