Distributed Massive MIMO via all-Digital Radio Over Fiber

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.

Durisi, Giuseppe,1977Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)durisi (author)
Sezgin, Ibrahim Can,1992Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)cani (author)
Jacobsson, Sven,1990Telefonaktiebolaget L M Ericsson,Ericsson(Swepub:cth)jsven (author)
Fager, Christian,1974Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)e3fager (author)
Coldrey, Mikael,1972Telefonaktiebolaget L M Ericsson,Ericsson(Swepub:cth)mito (author)
Telefonaktiebolaget L M EricssonChalmers tekniska högskola (creator_code:org_t)

In:Conference Record - Asilomar Conference on Signals, Systems and Computers2020-November, s. 319-3231058-6393

By the author/editor: Aabel, Lise, 199 ...; Durisi, Giuseppe ...; Sezgin, Ibrahim ...; Jacobsson, Sven, ...; Fager, Christian ...; Coldrey, Mikael, ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...; and Telecommunicatio ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...; and Communication Sy ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Electrical Engin ...; and Signal Processin ...

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