Phase and Channel Estimation for High-Capacity Phase-Asynchronous Mode-Division Multiplexing Multiple-Input Multiple-Output Free-Space Optical Communications in Strong Turbulent Channels


In this paper, we propose a novel pilot-aided phase and channel estimation algorithm for coherent mode-division multiplexing multiple-input multiple-output free-space optical communication system. This algorithm enables the implementation of advanced multiple-input multiple-output decoders, leading to a significantly better bit error rate performance. This algorithm also supports phase-asynchronous light sources at each transmit and receive channel, significantly reducing the hardware requirements. Moreover, it has low computational complexity and Cramér-Rao lower bound approaching estimation performance. In our proof-of-concept experiment, we employed 10 decorrelated channels to achieve a record-high 689.2 Gbit/s/wavelength line rate in strong turbulence, verifying the feasibility of our phase and channel estimation algorithm.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences
Funding Information: Research supported by EPSRC under Grants EP/T009047/1, EP/T009012/1, EP/S003436/1, and EP/S016171/1, and by the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant 713694, and Future and Emerging Technolo
Additional Information: Copyright © 2024, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Uncontrolled Keywords: Channel estimation,Decoding,Estimation,Free-space optics,MIMO communication,Phase noise,Symbols,Vectors,atmospheric turbulence,channel estimation,multiple-input multiple-output,Atomic and Molecular Physics, and Optics
Publication ISSN: 0733-8724
Last Modified: 16 May 2024 07:32
Date Deposited: 03 Apr 2024 15:58
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Related URLs: https://ieeexpl ... cument/10465598 (Publisher URL)
http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2024-03-11
Published Online Date: 2024-03-11
Authors: Li, Yiming (ORCID Profile 0000-0002-9442-2591)
Chen, Zhaozhong
Patel, Mohammed
Lavery, Martin P. J.
Ellis, Andrew D. (ORCID Profile 0000-0002-0417-0547)



Version: Accepted Version

License: ["licenses_description_unspecified" not defined]

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