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Uplink Interference Analysis with RF Switching for Lens-Based Millimeter-Wave Systems

Tataria, Harsh LU ; Matthaiou, Michail; Smith, Peter J; Alexandropoulos, George C and Fusco, Vincent F (2018) IEEE International Conference on Communications (ICC) 2018
Abstract
In this paper, we take a fundamental look at the interference characteristics of a lens-based millimeter-wave (mmWave) multiuser multiple-input multiple-output system (MU-MIMO) system. We consider a hybrid architecture, implemented via a bank of radio-frequency (RF) switches which perform beam selection followed by low-complexity uplink maximum-ratio combining (MRC) at baseband. Considering a Rotman lens antenna array in line- of-sight (LoS) propagation, we derive tight analytical approximations to the average (expected) interference power of an arbitrary terminal, with and without the presence of RF switching. The analytical expressions show that without RF switching, the Rotman lens losses its benefits and collapses to a conventional... (More)
In this paper, we take a fundamental look at the interference characteristics of a lens-based millimeter-wave (mmWave) multiuser multiple-input multiple-output system (MU-MIMO) system. We consider a hybrid architecture, implemented via a bank of radio-frequency (RF) switches which perform beam selection followed by low-complexity uplink maximum-ratio combining (MRC) at baseband. Considering a Rotman lens antenna array in line- of-sight (LoS) propagation, we derive tight analytical approximations to the average (expected) interference power of an arbitrary terminal, with and without the presence of RF switching. The analytical expressions show that without RF switching, the Rotman lens losses its benefits and collapses to a conventional uniform linear array. Our numerical results demonstrate that the expected interference power to a given terminal decreases significantly with RF switching, due to beam selection separating the uplink direction-of-arrivals (DoAs), in contrast to the case without RF switching, which relaxes the beam selection constraint and thus allows very similar DoAs. Overall, the results in this paper emphasize the necessity of RF switching in order to obtain superior performance with lens arrays, over conventional phased arrays. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
Interference, RF switching, LOS propagation, Multibeam arrays, Lens systems
host publication
IEEE International Conference on Communications (ICC) 2018
pages
7 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
IEEE International Conference on Communications (ICC) 2018
conference location
Kansas City, United States
conference dates
2018-05-23 - 2018-05-27
external identifiers
  • scopus:85051417864
ISBN
978-1-5386-3180-5
978-1-5386-3181-2
DOI
10.1109/ICC.2018.8422812
language
English
LU publication?
no
id
2de6b6bf-ae32-4048-a37f-c6baa515b537
date added to LUP
2018-11-28 11:22:32
date last changed
2019-04-10 04:17:22
@inproceedings{2de6b6bf-ae32-4048-a37f-c6baa515b537,
  abstract     = {In this paper, we take a fundamental look at the interference characteristics of a lens-based millimeter-wave (mmWave) multiuser multiple-input multiple-output system (MU-MIMO) system. We consider a hybrid architecture, implemented via a bank of radio-frequency (RF) switches which perform beam selection followed by low-complexity uplink maximum-ratio combining (MRC) at baseband. Considering a Rotman lens antenna array in line- of-sight (LoS) propagation, we derive tight analytical approximations to the average (expected) interference power of an arbitrary terminal, with and without the presence of RF switching. The analytical expressions show that without RF switching, the Rotman lens losses its benefits and collapses to a conventional uniform linear array. Our numerical results demonstrate that the expected interference power to a given terminal decreases significantly with RF switching, due to beam selection separating the uplink direction-of-arrivals (DoAs), in contrast to the case without RF switching, which relaxes the beam selection constraint and thus allows very similar DoAs. Overall, the results in this paper emphasize the necessity of RF switching in order to obtain superior performance with lens arrays, over conventional phased arrays.},
  author       = {Tataria, Harsh and Matthaiou, Michail and Smith, Peter J and Alexandropoulos, George C  and Fusco, Vincent F },
  isbn         = {978-1-5386-3180-5},
  keyword      = {Interference,RF switching,LOS propagation,Multibeam arrays,Lens systems},
  language     = {eng},
  location     = {Kansas City, United States},
  month        = {05},
  pages        = {7},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {Uplink Interference Analysis with RF Switching for Lens-Based Millimeter-Wave Systems},
  url          = {http://dx.doi.org/10.1109/ICC.2018.8422812},
  year         = {2018},
}