Massive MIMO From a Terminal Perspective
(2019) 124(124).- Abstract
- This thesis focuses on the terminal aspects of massive MIMO systems. Based on the degree of freedom a terminal have in a MaMi, different antenna configurations, transceiver topologies with associated transmission schemes, and the underlying algorithms are researched.
The first studied topic concerns multiple-antenna terminals in a massive MIMO system for sub-6 GHz, operated at the center frequency of 3.7 GHz. Simulation environments based on fully-stochastic as well as geometric-stochastic approaches are developed and the results are compared to measured.
For the measurements the Lund University Massive MIMO (LuMaMi) testbed has been used. To enable evaluation of multi-antenna terminals, modifications to the LuMaMi framework... (More) - This thesis focuses on the terminal aspects of massive MIMO systems. Based on the degree of freedom a terminal have in a MaMi, different antenna configurations, transceiver topologies with associated transmission schemes, and the underlying algorithms are researched.
The first studied topic concerns multiple-antenna terminals in a massive MIMO system for sub-6 GHz, operated at the center frequency of 3.7 GHz. Simulation environments based on fully-stochastic as well as geometric-stochastic approaches are developed and the results are compared to measured.
For the measurements the Lund University Massive MIMO (LuMaMi) testbed has been used. To enable evaluation of multi-antenna terminals, modifications to the LuMaMi framework have been necessary. Real-time diversity schemes for dual antenna terminals as well as a channel capturing feature have been implemented. The latter, to enable analysis and post processing of measured channels from the multi-antenna terminals.
Multi-antenna terminal prototypes with integrated antennas, based on real Sony Xperia smartphone chassis where designed for the evaluation. The three-dimensional antenna gain-patterns have been characterized in an anechoic chamber to ensure that simulations and measurements have a common ground.
The second topic in this thesis relates to mm-wave massive MIMO systems. As a first step toward evaluation of handsets, a 28 GHz channel sounder has been developed for the measurement of dynamic, highly resolved, in both temporal and spatial domains, propagation channels. To enable measurements, a 256$\times$128 antenna-element system was designed together with a control program to handle the switching and the enormous amount of data.
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Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/0eba1466-65a9-451f-bb8d-fd829c30a81e
- author
- Bengtsson, Erik L LU
- supervisor
- opponent
-
- Professor Ekman, Nils Torbjörn, Norwegian University of Science and Technology, Norway
- organization
- publishing date
- 2019-09-03
- type
- Thesis
- publication status
- published
- subject
- keywords
- Massive MIMO, mm-wave, terminal antenna, channel sounding, Propagation Channel, sub 6 GHz
- volume
- 124
- issue
- 124
- edition
- 1
- pages
- 274 pages
- publisher
- Department of Electrical and Information Technology, Lund University
- defense location
- Lecture Hall E:1406, E-Building, Ole Römers väg 3, Lund University, Faculty of Engineering LTH, Lund
- defense date
- 2019-09-27 09:00:00
- ISSN
- 1654-790X
- 1654-790X
- ISBN
- 978-91-7895-253-3
- 978-91-7895-254-0
- language
- English
- LU publication?
- yes
- id
- 0eba1466-65a9-451f-bb8d-fd829c30a81e
- date added to LUP
- 2019-08-12 12:29:26
- date last changed
- 2021-05-07 07:52:50
@phdthesis{0eba1466-65a9-451f-bb8d-fd829c30a81e, abstract = {{This thesis focuses on the terminal aspects of massive MIMO systems. Based on the degree of freedom a terminal have in a MaMi, different antenna configurations, transceiver topologies with associated transmission schemes, and the underlying algorithms are researched.<br/><br/>The first studied topic concerns multiple-antenna terminals in a massive MIMO system for sub-6 GHz, operated at the center frequency of 3.7 GHz. Simulation environments based on fully-stochastic as well as geometric-stochastic approaches are developed and the results are compared to measured. <br/>For the measurements the Lund University Massive MIMO (LuMaMi) testbed has been used. To enable evaluation of multi-antenna terminals, modifications to the LuMaMi framework have been necessary. Real-time diversity schemes for dual antenna terminals as well as a channel capturing feature have been implemented. The latter, to enable analysis and post processing of measured channels from the multi-antenna terminals. <br/><br/>Multi-antenna terminal prototypes with integrated antennas, based on real Sony Xperia smartphone chassis where designed for the evaluation. The three-dimensional antenna gain-patterns have been characterized in an anechoic chamber to ensure that simulations and measurements have a common ground. <br/><br/>The second topic in this thesis relates to mm-wave massive MIMO systems. As a first step toward evaluation of handsets, a 28 GHz channel sounder has been developed for the measurement of dynamic, highly resolved, in both temporal and spatial domains, propagation channels. To enable measurements, a 256$\times$128 antenna-element system was designed together with a control program to handle the switching and the enormous amount of data.<br/>}}, author = {{Bengtsson, Erik L}}, isbn = {{978-91-7895-253-3}}, issn = {{1654-790X}}, keywords = {{Massive MIMO; mm-wave; terminal antenna; channel sounding; Propagation Channel; sub 6 GHz}}, language = {{eng}}, month = {{09}}, number = {{124}}, publisher = {{Department of Electrical and Information Technology, Lund University}}, school = {{Lund University}}, title = {{Massive MIMO From a Terminal Perspective}}, url = {{https://lup.lub.lu.se/search/files/69043411/Thesis_Erik_B_Final.pdf}}, volume = {{124}}, year = {{2019}}, }