Impact of Phase Noise on Uplink Cell-Free Massive MIMO OFDM
Paper i proceeding, 2023
Cell-Free massive MIMO networks provide huge power gains and resolve inter-cell interference by coherent processing over a massive number of distributed instead of co-located antennas in access points (APs). Cost-efficient hardware is preferred but imperfect local oscillators in both APs and users introduce multiplicative phase noise (PN), which affects the phase coherence between APs and users even with centralized processing. In this paper, we first formulate the system model of a PN-impaired uplink Cell-Free massive MIMO orthogonal frequency division multiplexing network, and then propose a PN-aware linear minimum mean square error channel estimator and derive a PN-impaired uplink spectral efficiency expression. Numerical results are used to quantify the spectral efficiency gain of the proposed channel estimator over alternative schemes for different receiving combiners.
Cell-Free massive OFDM MIMO
channel estimation
phase noise
spectral efficiency
hardware impairments
Författare
Yibo Wu
Ericsson AB
Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk
Gigahertzcentrum
Luca Sanguinetti
Universita di Pisa
Ulf Gustavsson
Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk
Ericsson AB
Alexandre Graell I Amat
Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk
Henk Wymeersch
Gigahertzcentrum
Chalmers, Elektroteknik, Kommunikation, Antenner och Optiska Nätverk
Antennforskningscentrum (ChaseOn)
Proceedings - IEEE Global Communications Conference, GLOBECOM
23340983 (ISSN) 25766813 (eISSN)
5829-58349798350310900 (ISBN)
IEEE Global Communications Conference, GLOBECOM 2023
Kuala Lumpur, Malaysia,
Kuala Lumpur, Malaysia,
Djup RF
Stiftelsen för Strategisk forskning (SSF) (DnrID19-0021), 2020-01-01 -- 2024-12-31.
Ericsson AB, 2020-01-01 -- 2024-12-31.
Styrkeområden
Informations- och kommunikationsteknik
Ämneskategorier (SSIF 2011)
Telekommunikation
Kommunikationssystem
Signalbehandling
DOI
10.1109/GLOBECOM54140.2023.10437146