Distributed Massive MIMO via all-Digital Radio Over Fiber
Paper in 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.

Author

Lise Aabel

Ericsson

Giuseppe Durisi

Chalmers, Electrical Engineering, Communication and Antenna Systems, Communication Systems

Ibrahim Can Sezgin

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics, Microwave Electronics

Sven Jacobsson

Ericsson

Christian Fager

Chalmers, Microtechnology and Nanoscience (MC2), Microwave Electronics

Mikael Coldrey

Ericsson

Conference Record - Asilomar Conference on Signals, Systems and Computers

10586393 (ISSN)

Vol. 2020-November 319-323 9443347

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

Distributed massive MIMO with low-precision components

Swedish Foundation for Strategic Research (SSF), 2020-03-01 -- 2024-12-09.

Integrated Antenna Arrays (VINNOVA Competence Center ChaseOn)

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

Areas of Advance

Information and Communication Technology

Subject Categories

Telecommunications

Communication Systems

Signal Processing

DOI

10.1109/IEEECONF51394.2020.9443347

More information

Latest update

6/24/2021