Experimental Study of the Benefits of a Second Antenna at the User Side in a Massive MIMO System
Massive MIMO is commonly described as a large number of base station (BS) antennas serving a smaller number of single-antenna users. However, adding a second antenna to the user handset opens the possibility to exploit multiplexing techniques and obtain higher throughput. This paper is based on a me...
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| Format: | Article |
| Language: | English |
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IEEE
2018-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8233104/ |
| _version_ | 1818415326281334784 |
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| author | Alex Oliveras Martinez Petar Popovski Jesper Odum Nielsen Elisabeth De Carvalho |
| author_facet | Alex Oliveras Martinez Petar Popovski Jesper Odum Nielsen Elisabeth De Carvalho |
| author_sort | Alex Oliveras Martinez |
| collection | DOAJ |
| description | Massive MIMO is commonly described as a large number of base station (BS) antennas serving a smaller number of single-antenna users. However, adding a second antenna to the user handset opens the possibility to exploit multiplexing techniques and obtain higher throughput. This paper is based on a measurement campaign comprising a BS with 64 elements reconfigurable into three shapes: 1) a very large array with 6-m aperture; 2) a large array with 2m aperture; and 3) a compact two dimensional array with 25 cm by 28 cm sides. We study the throughput in single-user and multi-user scenarios using both non-linear optimal and linear precoders. The experimental results show that the throughput increases when adding a second antenna, but the increase is lower than in Gaussian channels due to the intra-user correlation. However, increasing the number of BS antennas, massive MIMO achieves more benefits from the second antenna. A large number of users in the system and the inter-user correlation reduce the benefits of a second antenna in the user handset. |
| first_indexed | 2024-12-14T11:33:13Z |
| format | Article |
| id | doaj.art-8f97e7490476475b86ea28f83fc5c3ea |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-14T11:33:13Z |
| publishDate | 2018-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-8f97e7490476475b86ea28f83fc5c3ea2022-12-21T23:03:10ZengIEEEIEEE Access2169-35362018-01-0162899290710.1109/ACCESS.2017.27858608233104Experimental Study of the Benefits of a Second Antenna at the User Side in a Massive MIMO SystemAlex Oliveras Martinez0https://orcid.org/0000-0003-2002-570XPetar Popovski1Jesper Odum Nielsen2Elisabeth De Carvalho3Department of Electronic Systems, Technical Faculty of IT and Design, Aalborg University, Aalborg, DenmarkDepartment of Electronic Systems, Technical Faculty of IT and Design, Aalborg University, Aalborg, DenmarkDepartment of Electronic Systems, Technical Faculty of IT and Design, Aalborg University, Aalborg, DenmarkDepartment of Electronic Systems, Technical Faculty of IT and Design, Aalborg University, Aalborg, DenmarkMassive MIMO is commonly described as a large number of base station (BS) antennas serving a smaller number of single-antenna users. However, adding a second antenna to the user handset opens the possibility to exploit multiplexing techniques and obtain higher throughput. This paper is based on a measurement campaign comprising a BS with 64 elements reconfigurable into three shapes: 1) a very large array with 6-m aperture; 2) a large array with 2m aperture; and 3) a compact two dimensional array with 25 cm by 28 cm sides. We study the throughput in single-user and multi-user scenarios using both non-linear optimal and linear precoders. The experimental results show that the throughput increases when adding a second antenna, but the increase is lower than in Gaussian channels due to the intra-user correlation. However, increasing the number of BS antennas, massive MIMO achieves more benefits from the second antenna. A large number of users in the system and the inter-user correlation reduce the benefits of a second antenna in the user handset.https://ieeexplore.ieee.org/document/8233104/Massive MIMOmulti-user MIMOchannel measurementsindoor propagationantenna arrays |
| spellingShingle | Alex Oliveras Martinez Petar Popovski Jesper Odum Nielsen Elisabeth De Carvalho Experimental Study of the Benefits of a Second Antenna at the User Side in a Massive MIMO System IEEE Access Massive MIMO multi-user MIMO channel measurements indoor propagation antenna arrays |
| title | Experimental Study of the Benefits of a Second Antenna at the User Side in a Massive MIMO System |
| title_full | Experimental Study of the Benefits of a Second Antenna at the User Side in a Massive MIMO System |
| title_fullStr | Experimental Study of the Benefits of a Second Antenna at the User Side in a Massive MIMO System |
| title_full_unstemmed | Experimental Study of the Benefits of a Second Antenna at the User Side in a Massive MIMO System |
| title_short | Experimental Study of the Benefits of a Second Antenna at the User Side in a Massive MIMO System |
| title_sort | experimental study of the benefits of a second antenna at the user side in a massive mimo system |
| topic | Massive MIMO multi-user MIMO channel measurements indoor propagation antenna arrays |
| url | https://ieeexplore.ieee.org/document/8233104/ |
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