Distributed Massive MIMO via all-Digital Radio Over Fiber
Paper i proceeding, 2020

A crucial challenge in the implementation of distributed massive multiple-input multiple-output (MIMO) architectures is to provide phase coherence while, at the same time, limit the complexity of the remote-radio heads (RRHs), which is important for cost-efficient scalability. To address this challenge, we present in this paper a phase-coherent distributed MIMO architecture, based on off-the-shelf, low-cost components. In the proposed architecture, up- and down-conversion are carried out at the central unit (CU). The RRHs are connected to the CU by means of optical fibers carrying oversampled radio-frequency (RF) 1-bit signals. In the downlink, the 1-bit signal is generated via sigma-delta modulation. At the RRH, the RF signal is recovered from the 1-bit signal through a bandpass filter and a power amplifier, and then fed to an antenna. In the uplink, the 1-bit signal is generated by a comparator whose inputs are the low-noise-amplified received RF signal and a suitably designed dither signal. The performance of the proposed architecture is evaluated with satisfactory results both via simulation and measurements from a testbed.

Författare

Lise Aabel

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Giuseppe Durisi

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Ibrahim Can Sezgin

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik, Mikrovågselektronik

Sven Jacobsson

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Christian Fager

Chalmers, Mikroteknologi och nanovetenskap (MC2), Mikrovågselektronik

Mikael Coldrey

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Conference Record - Asilomar Conference on Signals, Systems and Computers

10586393 (ISSN)

2020 Asilomar Conference on Signals, Systems and Computers
Asilomar, USA,

Distributed massive MIMO with low-precision components

Stiftelsen för Strategisk forskning (SSF), 2020-03-01 -- 2024-12-09.

Integrated Antenna Arrays (VINNOVA Competence Center ChaseOn)

VINNOVA, 2016-01-01 -- 2021-12-31.

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

Kommunikationssystem

Signalbehandling

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Senast uppdaterat

2020-12-10