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Downlink Spectral Efficiency of Cell-Free Massive MIMO with Full-Pilot Zero-Forcing

Abstract: 

Cell-free Massive multiple-input multiple-output
(MIMO) ensures ubiquitous communication at high spectral
efficiency (SE) thanks to increased macro-diversity as compared
cellular communications. However, system scalability and performance
are limited by fronthauling traffic and interference.
Unlike conventional precoding schemes that only suppress intra-cell
interference, full-pilot zero-forcing (fpZF), introduced in [1],
actively suppresses also inter-cell interference, without sharing
channel state information (CSI) among the access points (APs).
In this study, we derive a new closed-form expression for
the downlink (DL) SE of a cell-free Massive MIMO system
with multi-antenna APs and fpZF precoding, under imperfect
CSI and pilot contamination. The analysis also includes max-min
fairness DL power optimization. Numerical results show
that fpZF significantly outperforms maximum ratio transmission
scheme, without increasing the fronthauling overhead, as long as
the system is sufficiently distributed.

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Paper Details

Authors:
Giovanni Interdonato, Marcus Karlsson, Emil Björnson, Erik G. Larsson
Submitted On:
26 November 2018 - 3:28pm
Short Link:
Type:
Presentation Slides
Event:
Presenter's Name:
Giovanni Interdonato
Paper Code:
1232
Document Year:
2018
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Document Files

interdonato-globalsip.pdf

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[1] Giovanni Interdonato, Marcus Karlsson, Emil Björnson, Erik G. Larsson, "Downlink Spectral Efficiency of Cell-Free Massive MIMO with Full-Pilot Zero-Forcing", IEEE SigPort, 2018. [Online]. Available: http://sigport.org/3786. Accessed: Apr. 25, 2019.
@article{3786-18,
url = {http://sigport.org/3786},
author = {Giovanni Interdonato; Marcus Karlsson; Emil Björnson; Erik G. Larsson },
publisher = {IEEE SigPort},
title = {Downlink Spectral Efficiency of Cell-Free Massive MIMO with Full-Pilot Zero-Forcing},
year = {2018} }
TY - EJOUR
T1 - Downlink Spectral Efficiency of Cell-Free Massive MIMO with Full-Pilot Zero-Forcing
AU - Giovanni Interdonato; Marcus Karlsson; Emil Björnson; Erik G. Larsson
PY - 2018
PB - IEEE SigPort
UR - http://sigport.org/3786
ER -
Giovanni Interdonato, Marcus Karlsson, Emil Björnson, Erik G. Larsson. (2018). Downlink Spectral Efficiency of Cell-Free Massive MIMO with Full-Pilot Zero-Forcing. IEEE SigPort. http://sigport.org/3786
Giovanni Interdonato, Marcus Karlsson, Emil Björnson, Erik G. Larsson, 2018. Downlink Spectral Efficiency of Cell-Free Massive MIMO with Full-Pilot Zero-Forcing. Available at: http://sigport.org/3786.
Giovanni Interdonato, Marcus Karlsson, Emil Björnson, Erik G. Larsson. (2018). "Downlink Spectral Efficiency of Cell-Free Massive MIMO with Full-Pilot Zero-Forcing." Web.
1. Giovanni Interdonato, Marcus Karlsson, Emil Björnson, Erik G. Larsson. Downlink Spectral Efficiency of Cell-Free Massive MIMO with Full-Pilot Zero-Forcing [Internet]. IEEE SigPort; 2018. Available from : http://sigport.org/3786