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Analog radio over fiber aided C-RAN: optical aided beamforming for multi-user adaptive MIMO design

Analog radio over fiber aided C-RAN: optical aided beamforming for multi-user adaptive MIMO design
Analog radio over fiber aided C-RAN: optical aided beamforming for multi-user adaptive MIMO design
Given the increasing demand for high data-rate, high-performance wireless communications services, the demand on the radio access networks (RAN) has been increasing significantly, where optical fiber has been widely used both for the backhaul and fronthaul. Additionally, advances in signal processing such as multiple-input multiple-output (MIMO) techniques, have improved the performance as well as transmission rate of communications networks. Beamforming has been used as an efficient MIMO technique for providing a signal to noise ratio (SNR) gain as well as reducing the multi-user interference. However, beamforming requires the employment of phase-shifters, which suffers from reduced phase resolutions, degraded noise figures as well as beam-squinting in addition to the implementation challenges. Hence, in this paper we employ an analogue radio over fiber (A-RoF) aided architecture for supporting the requirements of the current and future mobile networks, where we design a photonics aided beamforming technique in order to eliminate the bulky electronic phase-shifters and the beam-squinting effect, while also providing a low-cost RAN solution. Additionally, this photonics aided beamforming is combined with a reconfigurable multi-user MIMO technique, where users can communicate with one or multiple remote radio heads (RRHs), while employing stand-alone beamforming, beamforming combined with diversity or with multiplexing depending on the available resources and the user channel information as well as the quality of service requirements.
Li, Yichuan
66d2dfef-f67a-4d18-9338-301ffc972595
Ghafoor, Salman
f38df426-2a21-4207-bb4a-002824556622
Uddin Butt, Muhammad Fasih
a614c886-f882-4219-adfe-97dd2616da79
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f
Li, Yichuan
66d2dfef-f67a-4d18-9338-301ffc972595
Ghafoor, Salman
f38df426-2a21-4207-bb4a-002824556622
Uddin Butt, Muhammad Fasih
a614c886-f882-4219-adfe-97dd2616da79
El-Hajjar, Mohammed
3a829028-a427-4123-b885-2bab81a44b6f

Li, Yichuan, Ghafoor, Salman, Uddin Butt, Muhammad Fasih and El-Hajjar, Mohammed (2021) Analog radio over fiber aided C-RAN: optical aided beamforming for multi-user adaptive MIMO design. Frontiers in Communications and Networks. (doi:10.3389/frcmn.2021.725976).

Record type: Article

Abstract

Given the increasing demand for high data-rate, high-performance wireless communications services, the demand on the radio access networks (RAN) has been increasing significantly, where optical fiber has been widely used both for the backhaul and fronthaul. Additionally, advances in signal processing such as multiple-input multiple-output (MIMO) techniques, have improved the performance as well as transmission rate of communications networks. Beamforming has been used as an efficient MIMO technique for providing a signal to noise ratio (SNR) gain as well as reducing the multi-user interference. However, beamforming requires the employment of phase-shifters, which suffers from reduced phase resolutions, degraded noise figures as well as beam-squinting in addition to the implementation challenges. Hence, in this paper we employ an analogue radio over fiber (A-RoF) aided architecture for supporting the requirements of the current and future mobile networks, where we design a photonics aided beamforming technique in order to eliminate the bulky electronic phase-shifters and the beam-squinting effect, while also providing a low-cost RAN solution. Additionally, this photonics aided beamforming is combined with a reconfigurable multi-user MIMO technique, where users can communicate with one or multiple remote radio heads (RRHs), while employing stand-alone beamforming, beamforming combined with diversity or with multiplexing depending on the available resources and the user channel information as well as the quality of service requirements.

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More information

Accepted/In Press date: 9 August 2021
e-pub ahead of print date: 31 August 2021

Identifiers

Local EPrints ID: 451562
URI: http://eprints.soton.ac.uk/id/eprint/451562
PURE UUID: dedffac4-daf7-47fe-b063-f4cb1c815cd2
ORCID for Mohammed El-Hajjar: ORCID iD orcid.org/0000-0002-7987-1401

Catalogue record

Date deposited: 11 Oct 2021 16:31
Last modified: 13 Dec 2021 03:08

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Contributors

Author: Yichuan Li
Author: Salman Ghafoor
Author: Muhammad Fasih Uddin Butt
Author: Mohammed El-Hajjar ORCID iD

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