Atmospheric turbulence mitigation in an OAM-based MIMO free-space optical link using spatial diversity combined with MIMO equalization | Zendy

Yongxiong Ren | Zendy; Zhe Wang | Zendy; Guodong Xie | Zendy; Long Li | Zendy; Asher J. Willner | Zendy; Yinwen Cao | Zendy; Zhe Zhao | Zendy; Yan Yan | Zendy; Nisar Ahmed | Zendy; Nima Ashrafi | Zendy; Solyman Ashrafi | Zendy; Robert Bock | Zendy; Moshe Tur | Zendy; Alan E. Willner | Zendy

Open Access

Atmospheric turbulence mitigation in an OAM-based MIMO free-space optical link using spatial diversity combined with MIMO equalization

Author(s) -

Yongxiong Ren,

Zhe Wang,

Guodong Xie,

Long Li,

Asher J. Willner,

Yinwen Cao,

Zhe Zhao,

Yan Yan,

Nisar Ahmed,

Nima Ashrafi,

Solyman Ashrafi,

Robert Bock,

Moshe Tur,

Alan E. Willner

Publication year - 2016

Publication title -

optics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.524

H-Index - 272

eISSN - 1071-2763

pISSN - 0146-9592

DOI - 10.1364/ol.41.002406

Subject(s) - mimo , transmitter , equalization (audio) , spatial multiplexing , antenna diversity , aperture (computer memory) , multiplexing , free space optical communication , physics , computer science , 3g mimo , turbulence , optical communication , multi user mimo , diversity gain , electronic engineering , optics , telecommunications , wireless , channel (broadcasting) , engineering , acoustics , thermodynamics

We explore the mitigation of atmospheric turbulence effects for orbital angular momentum (OAM)-based free-space optical (FSO) communications with multiple-input multiple-output (MIMO) architecture. Such a system employs multiple spatially separated aperture elements at the transmitter/receiver, and each transmitter aperture contains multiplexed data-carrying OAM beams. We propose to use spatial diversity combined with MIMO equalization to mitigate both weak and strong turbulence distortions. In a 2×2 FSO link with each transmitter aperture containing two multiplexed OAM modes of ℓ=+1 and ℓ=+3, we experimentally show that at least two OAM data channels could be recovered under both weak and strong turbulence distortions using selection diversity assisted with MIMO equalization.

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