UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Single sideband signals for phase noise mitigation in wireless THz-over-fibre systems

Gonzalez-Guerrero, L; Shams, H; Fatadin, I; Fice, MJ; Naftaly, M; Seeds, AJ; Renaud, CC; (2018) Single sideband signals for phase noise mitigation in wireless THz-over-fibre systems. Journal of Lightwave Technology , 36 (19) pp. 4527-4534. 10.1109/JLT.2018.2864145. Green open access

[img]
Preview
Text
08430507.pdf - Published version

Download (2MB) | Preview

Abstract

In future photonic-based THz backhaul links, integrating the optical local oscillator (LO) in a remote antenna unit can be beneficial in terms of optical bandwidth efficiency and higher compatibility with passive optical networks. In such a scenario, two approaches can be used to reduce the high phase noise associated with free-running lasers: 1) baseband (BB) signals & carrier recovery, and 2) single sideband (SSB) signals & envelope detection. In this paper, we compare the performance of the two approaches for various optical LO linewidths using 5 GBd 16-QAM signals. We find that, for a total linewidth wider than 0.55 MHz, the SSB approach yields better results. The superior performance, however, comes at the expense of reducing the net information spectral density (ISD) of the SSB signal by 39% compared to that of the BB signal. However, using signal–signal beat interference-mitigation algorithms, an ISD only 15% lower than the BB signal ISD was sufficient to meet the FEC requirement. Given these results, we believe that the envelope detection of SSB signals is a promising solution to mitigate the phase noise problem of THz links based on free-running lasers, without excessively compromising the spectral efficiency of the system.

Type: Article
Title: Single sideband signals for phase noise mitigation in wireless THz-over-fibre systems
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JLT.2018.2864145
Publisher version: https://doi.org/10.1109/JLT.2018.2864145
Language: English
Additional information: This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/
Keywords: Broadband communication, digital signal processing, envelope detectors, microwave photonics, millimeter wave communication, optical mixing, photonic integrated circuits, semiconductor lasers
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10054998
Downloads since deposit
64Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item