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Impact of RF Processing and Switching Errors in Lens-Based Massive MIMO Systems

Tataria, Harsh LU ; Matthaiou, Michail; Smith, Peter J; Alexandropoulos, George C and Fusco, Vincent F (2018) 19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018
Abstract
Lens–based massive multiple–input multiple–output (MIMO) systems have considerable potential to reduce signal processing cost at millimeter–wave frequencies. As a result, they are able to lower the effective channel dimension via beam selection, realized with a network of radio–frequency (RF) switches. However, lens arrays suffer from the inherent quantization of the beamspace, as well as errors due to imperfections in the lens construction itself. Unlike prior works, we model the above effects in the context of a Rotman lens–enabled massive MIMO system. Assuming line–of–sight propagation, we derive analytical approximations of the expected (average) signal–to–interference–plus–noise–ratio (SINR) of a terminal and ergodic sum spectral... (More)
Lens–based massive multiple–input multiple–output (MIMO) systems have considerable potential to reduce signal processing cost at millimeter–wave frequencies. As a result, they are able to lower the effective channel dimension via beam selection, realized with a network of radio–frequency (RF) switches. However, lens arrays suffer from the inherent quantization of the beamspace, as well as errors due to imperfections in the lens construction itself. Unlike prior works, we model the above effects in the context of a Rotman lens–enabled massive MIMO system. Assuming line–of–sight propagation, we derive analytical approximations of the expected (average) signal–to–interference–plus–noise–ratio (SINR) of a terminal and ergodic sum spectral efficiency of the system. Our analysis caters for spillover losses in the Rotman lens and imperfections in the RF switching matrix, caused by impedance mismatches, as well as poor port isolation. The presented numerical results show large degradation in the expected SINR and ergodic spectral efficiency when considering the above imperfections, yielding more accurate performance assessment of lens–based massive MIMO systems. (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
RF beamsteering, RF switching, Imperfect processing, SINR, Spectral efficiency, Millimeter-wave systems, Rotman lens arrays
host publication
IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC) 2018
pages
5 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2018
conference location
Kalamata, Greece
conference dates
2018-06-25 - 2018-06-28
external identifiers
  • scopus:85053468339
ISBN
978-1-5386-3513-1
978-1-5386-3512-4
DOI
10.1109/SPAWC.2018.8445998
language
English
LU publication?
no
id
98310e9f-ae44-4899-bfb7-b3b213c832d0
date added to LUP
2018-11-27 21:22:32
date last changed
2019-02-20 11:38:04
@inproceedings{98310e9f-ae44-4899-bfb7-b3b213c832d0,
  abstract     = {Lens–based massive multiple–input multiple–output (MIMO) systems have considerable potential to reduce signal processing cost at millimeter–wave frequencies. As a result, they are able to lower the effective channel dimension via beam selection, realized with a network of radio–frequency (RF) switches. However, lens arrays suffer from the inherent quantization of the beamspace, as well as errors due to imperfections in the lens construction itself. Unlike prior works, we model the above effects in the context of a Rotman lens–enabled massive MIMO system. Assuming line–of–sight propagation, we derive analytical approximations of the expected (average) signal–to–interference–plus–noise–ratio (SINR) of a terminal and ergodic sum spectral efficiency of the system. Our analysis caters for spillover losses in the Rotman lens and imperfections in the RF switching matrix, caused by impedance mismatches, as well as poor port isolation. The presented numerical results show large degradation in the expected SINR and ergodic spectral efficiency when considering the above imperfections, yielding more accurate performance assessment of lens–based massive MIMO systems.},
  author       = {Tataria, Harsh and Matthaiou, Michail and Smith, Peter J and Alexandropoulos, George C  and Fusco, Vincent F },
  isbn         = {978-1-5386-3513-1},
  keyword      = {RF beamsteering,RF switching,Imperfect processing,SINR,Spectral efficiency,Millimeter-wave systems,Rotman lens arrays},
  language     = {eng},
  location     = {Kalamata, Greece},
  month        = {06},
  pages        = {5},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {Impact of RF Processing and Switching Errors in Lens-Based Massive MIMO Systems},
  url          = {http://dx.doi.org/10.1109/SPAWC.2018.8445998},
  year         = {2018},
}