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On the Performance of Cell-Free Massive MIMO in Ricean Fading

Ngo, Hien Quoc; Tataria, Harsh LU ; Matthaiou, Michail; Jin, Shi and Larsson, Erik G. (2018) IEEE 52nd Annual Asilomar Conference on Signals, Systems, and Computers
Abstract
We consider an uplink time–division duplex cell–free massive multiple–input multiple–output (MIMO) system in which many user equipments (UEs) are simultaneously served by many access points (APs) via simple matched filtering processing. The propagation channel is modeled via the Ricean distribution, which includes a dominant line–of–sight component on top of diffuse scattering. The Ricean K–factor of each link varies with the UE location (relative to the locations of the APs). The system performance in terms of the spectral efficiency is investigated taking into account imperfect channel knowledge. Power and AP–
weighting control is proposed to maximize the lowest spectral efficiency across all UEs. This optimization problem can be... (More)
We consider an uplink time–division duplex cell–free massive multiple–input multiple–output (MIMO) system in which many user equipments (UEs) are simultaneously served by many access points (APs) via simple matched filtering processing. The propagation channel is modeled via the Ricean distribution, which includes a dominant line–of–sight component on top of diffuse scattering. The Ricean K–factor of each link varies with the UE location (relative to the locations of the APs). The system performance in terms of the spectral efficiency is investigated taking into account imperfect channel knowledge. Power and AP–
weighting control is proposed to maximize the lowest spectral efficiency across all UEs. This optimization problem can be efficiently solved via a bisection method by solving a sequence of linear feasibility problems together with the generalized eigenvalue problem. We show that by optimally selecting the power control and AP–weighting coefficients, the per–UE throughput increases significantly. Furthermore, we propose an AP selection scheme to reduce the backhaul requirements in a cell–free massive MIMO system, with slight reduction in performance. (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
in press
subject
keywords
Cell-free systems, Massive MIMO, Ricean fading, Power control, Access point selection
host publication
IEEE 52nd Annual Asilomar Conference on Signals, Systems, and Computers
pages
6 pages
conference name
IEEE 52nd Annual Asilomar Conference on Signals, Systems, and Computers
conference location
Palo Alto, CA, United States
conference dates
2018-10-28 - 2018-10-31
language
English
LU publication?
no
id
a2ec2bb1-6869-49d8-b043-68f2637f9115
date added to LUP
2018-11-28 13:10:15
date last changed
2018-11-28 14:19:34
@inproceedings{a2ec2bb1-6869-49d8-b043-68f2637f9115,
  abstract     = {We consider an uplink time–division duplex cell–free massive multiple–input multiple–output (MIMO) system in which many user equipments (UEs) are simultaneously served by many access points (APs) via simple matched filtering processing. The propagation channel is modeled via the Ricean distribution, which includes a dominant line–of–sight component on top of diffuse scattering. The Ricean K–factor of each link varies with the UE location (relative to the locations of the APs). The system performance in terms of the spectral efficiency is investigated taking into account imperfect channel knowledge. Power and AP–<br/>weighting control is proposed to maximize the lowest spectral efficiency across all UEs. This optimization problem can be efficiently solved via a bisection method by solving a sequence of linear feasibility problems together with the generalized eigenvalue problem. We show that by optimally selecting the power control and AP–weighting coefficients, the per–UE throughput increases significantly. Furthermore, we propose an AP selection scheme to reduce the backhaul requirements in a cell–free massive MIMO system, with slight reduction in performance.},
  author       = {Ngo, Hien Quoc and Tataria, Harsh and Matthaiou, Michail and Jin, Shi and Larsson, Erik G.},
  keyword      = {Cell-free systems,Massive MIMO,Ricean fading,Power control,Access point selection},
  language     = {eng},
  location     = {Palo Alto, CA, United States},
  month        = {10},
  pages        = {6},
  title        = {On the Performance of Cell-Free Massive MIMO in Ricean Fading},
  year         = {2018},
}