Performance of a 28 GHz Two-Stage Rotman Lens Beamformer for Millimeter Wave Cellular Systems
(2018) 13th European Conference on Antennas and Propagation 2019- Abstract
- Phase shifter-based hybrid beamforming has received a lot of attention at millimeter-wave frequencies for cellular communications. Nevertheless, the implementation complexity of such beamformers is rather high due to the complexities involved in designing and fabricating the required radio-frequency (RF) circuits. In contrast, lens-based RF beamformers significantly reduce the implementation complexity, as all active circuits can be replaced by a passive device. In this paper, we present the sum spectral efficiency performance of an uplink multiuser multiple-input multiple-output (MU-MIMO) system with a 28 GHz Rotman lens. An asymmetric two-stage stacked design is fabricated with a 15 element 3 x 5 uniform rectangular array feeding 9 RF... (More)
- Phase shifter-based hybrid beamforming has received a lot of attention at millimeter-wave frequencies for cellular communications. Nevertheless, the implementation complexity of such beamformers is rather high due to the complexities involved in designing and fabricating the required radio-frequency (RF) circuits. In contrast, lens-based RF beamformers significantly reduce the implementation complexity, as all active circuits can be replaced by a passive device. In this paper, we present the sum spectral efficiency performance of an uplink multiuser multiple-input multiple-output (MU-MIMO) system with a 28 GHz Rotman lens. An asymmetric two-stage stacked design is fabricated with a 15 element 3 x 5 uniform rectangular array feeding 9 RF down-conversion chains towards baseband. Zero-forcing processing is employed at baseband for interference nulling and multistream recovery. Our results show that the MU-MIMO gains are substantially more pronounced for the two-stage architecture relative to a single-stage design due to the inclusion of the elevation multipath components. Moreover, we show that the asymmetric design can help to further reduce the implementation complexity, since the conventional beam selection network can be omitted from the RF front-end. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/5d1f6832-1243-4afd-9795-b01924c00fa0
- author
- Abbasi, Muhammad Ali Babar ; Tataria, Harsh LU ; Fusco, Vincent F and Matthaiou, Michail
- publishing date
- 2018-10-22
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- submitted
- subject
- keywords
- millimeter-wave antennas, millimeter-wave communication, Rotman lens arrays, RF switching, zero-forcing beamforming
- host publication
- 13th European Conference on Antennas and Propagation 2019 (EUCAP)
- pages
- 4 pages
- conference name
- 13th European Conference on Antennas and Propagation 2019
- conference location
- Krakow, Poland
- conference dates
- 2019-03-31 - 2019-04-05
- language
- English
- LU publication?
- no
- id
- 5d1f6832-1243-4afd-9795-b01924c00fa0
- date added to LUP
- 2018-11-27 20:39:31
- date last changed
- 2018-11-29 13:53:45
@inproceedings{5d1f6832-1243-4afd-9795-b01924c00fa0, abstract = {{Phase shifter-based hybrid beamforming has received a lot of attention at millimeter-wave frequencies for cellular communications. Nevertheless, the implementation complexity of such beamformers is rather high due to the complexities involved in designing and fabricating the required radio-frequency (RF) circuits. In contrast, lens-based RF beamformers significantly reduce the implementation complexity, as all active circuits can be replaced by a passive device. In this paper, we present the sum spectral efficiency performance of an uplink multiuser multiple-input multiple-output (MU-MIMO) system with a 28 GHz Rotman lens. An asymmetric two-stage stacked design is fabricated with a 15 element 3 x 5 uniform rectangular array feeding 9 RF down-conversion chains towards baseband. Zero-forcing processing is employed at baseband for interference nulling and multistream recovery. Our results show that the MU-MIMO gains are substantially more pronounced for the two-stage architecture relative to a single-stage design due to the inclusion of the elevation multipath components. Moreover, we show that the asymmetric design can help to further reduce the implementation complexity, since the conventional beam selection network can be omitted from the RF front-end.}}, author = {{Abbasi, Muhammad Ali Babar and Tataria, Harsh and Fusco, Vincent F and Matthaiou, Michail}}, booktitle = {{13th European Conference on Antennas and Propagation 2019 (EUCAP)}}, keywords = {{millimeter-wave antennas; millimeter-wave communication; Rotman lens arrays; RF switching; zero-forcing beamforming}}, language = {{eng}}, month = {{10}}, title = {{Performance of a 28 GHz Two-Stage Rotman Lens Beamformer for Millimeter Wave Cellular Systems}}, url = {{https://lup.lub.lu.se/search/files/54915530/1570503392.pdf}}, year = {{2018}}, }