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Aggressive RF Circuit Reduction Techniques in Millimeter Wave Cellular Systems

Abbasi, Muhammad Ali Babar; Tataria, Harsh LU ; Fusco, Vincent F ; Matthaiou, Michail and Alexandropoulos, George C (2019) IEEE 16th International Symposium on Wireless Communication Systems 2019
Abstract
In this paper, we introduce a novel hybrid multiuser multiple-input multiple-output (MU-MIMO) architecture, with an emphasis on aggressive millimeter-wave (mmWave) hardware reduction methods, omitting the beam selection stage. We propose a simplification in a 28 GHz Rotman lens, where the number of beam-ports are reduced relative to the array ports resulting in the removal of a bank of RF switches and its associated biasing network. We conducted full electromagnetic characterization of imperative lens defects and precisely quantify the expected loss. For the first time, it is shown that the beam-port decimation greatly reduces the total EM aberrations, and consequently increases the focusing capability of the lens. With maximum-ratio (MR)... (More)
In this paper, we introduce a novel hybrid multiuser multiple-input multiple-output (MU-MIMO) architecture, with an emphasis on aggressive millimeter-wave (mmWave) hardware reduction methods, omitting the beam selection stage. We propose a simplification in a 28 GHz Rotman lens, where the number of beam-ports are reduced relative to the array ports resulting in the removal of a bank of RF switches and its associated biasing network. We conducted full electromagnetic characterization of imperative lens defects and precisely quantify the expected loss. For the first time, it is shown that the beam-port decimation greatly reduces the total EM aberrations, and consequently increases the focusing capability of the lens. With maximum-ratio (MR) baseband processing, we study uplink signal-to-interference-plus-noise ratio (SINR) of a user terminal, and evaluate the sum spectral efficiency performance of the proposed system assuming a 28 GHz double-directional propagation channel. The performance of the proposed system is compared with the classical system include the beam selection network. Although the performance of the proposed architecture is sub-optimal relative to the conventional case, we demonstrate that it greatly simplifies the practical realizations of the mmWave RF front-ends, while still maintaining highly desirable and useful operational characteristics. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
in press
subject
keywords
Rotman lens arrays, Millimeter-wave systems, Beamforming, Maximum-ratio combining, RF switching
host publication
IEEE 16th International Symposium on Wireless Communication Systems (IEEE ISWCS) 2019
pages
5 pages
conference name
IEEE 16th International Symposium on Wireless Communication Systems 2019
conference location
Oulu, Finland
conference dates
2019-08-27 - 2019-08-30
language
English
LU publication?
yes
id
9a302418-050f-46c4-afcf-79378fac1eb0
date added to LUP
2018-11-27 19:37:07
date last changed
2019-06-10 11:43:17
@inproceedings{9a302418-050f-46c4-afcf-79378fac1eb0,
  abstract     = {In this paper, we introduce a novel hybrid multiuser multiple-input multiple-output (MU-MIMO) architecture, with an emphasis on aggressive millimeter-wave (mmWave) hardware reduction methods, omitting the beam selection stage. We propose a simplification in a 28 GHz Rotman lens, where the number of beam-ports are reduced relative to the array ports resulting in the removal of a bank of RF switches and its associated biasing network. We conducted full electromagnetic characterization of imperative lens defects and precisely quantify the expected loss. For the first time, it is shown that the beam-port decimation greatly reduces the total EM aberrations, and consequently increases the focusing capability of the lens. With maximum-ratio (MR) baseband processing, we study uplink signal-to-interference-plus-noise ratio (SINR) of a user terminal, and evaluate the sum spectral efficiency performance of the proposed system assuming a 28 GHz double-directional propagation channel. The performance of the proposed system is compared with the classical system include the beam selection network. Although the performance of the proposed architecture is sub-optimal relative to the conventional case, we demonstrate that it greatly simplifies the practical realizations of the mmWave RF front-ends, while still maintaining highly desirable and useful operational characteristics.  },
  author       = {Abbasi, Muhammad Ali Babar and Tataria, Harsh and Fusco, Vincent F  and Matthaiou, Michail and Alexandropoulos, George C },
  keyword      = {Rotman lens arrays,Millimeter-wave systems,Beamforming,Maximum-ratio combining,RF switching},
  language     = {eng},
  location     = {Oulu, Finland},
  month        = {06},
  pages        = {5},
  title        = {Aggressive RF Circuit Reduction Techniques in Millimeter Wave Cellular Systems},
  year         = {2019},
}