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Inter-aperture correlation in MIMO free space optical systems.

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Title: Inter-aperture correlation in MIMO free space optical systems.
Authors: Özbilgin, Tuğba1 tugbaozbilgin@gmail.com, Koca, Mutlu1
Source: Optics Communications. Oct2015, Vol. 353, p139-146. 8p.
Subjects: Optical apertures, Optical correlation, MIMO systems, Free space optical interconnects, Parameter estimation
Abstract: We present a unified framework for determining the inter-aperture separations in multiple-input–multiple-output (MIMO) free space optical (FSO) systems such that the transmitter–receiver paths are resolvable. The analysis framework is also useful in determining the amount of spatial correlation for a given set of system configuration parameters and aperture separations. It is applicable to both point apertures and also apertures with larger diameters and can be used at both transmit and receive arrays. We show that the results obtained via theoretical derivations are in good agreement with those in the literature obtained via measurements or simulations. The theoretical calculations reveal that even under strong turbulence conditions and very long link distances, aperture separations at the order of a few tens of centimeters are sufficient to have resolvable paths with independent fading gains. Furthermore, the channel correlations increase relatively slowly with decreasing inter-aperture separations which are below these values. We also provide design guidelines to obtain resolvable paths for several commonly used system configurations. [ABSTRACT FROM AUTHOR]
Copyright of Optics Communications is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 103117540
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Inter-aperture correlation in MIMO free space optical systems.
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  Data: <searchLink fieldCode="AR" term="%22Özbilgin%2C+Tuğba%22">Özbilgin, Tuğba</searchLink><relatesTo>1</relatesTo><i> tugbaozbilgin@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Koca%2C+Mutlu%22">Koca, Mutlu</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Optics+Communications%22">Optics Communications</searchLink>. Oct2015, Vol. 353, p139-146. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Optical+apertures%22">Optical apertures</searchLink><br /><searchLink fieldCode="DE" term="%22Optical+correlation%22">Optical correlation</searchLink><br /><searchLink fieldCode="DE" term="%22MIMO+systems%22">MIMO systems</searchLink><br /><searchLink fieldCode="DE" term="%22Free+space+optical+interconnects%22">Free space optical interconnects</searchLink><br /><searchLink fieldCode="DE" term="%22Parameter+estimation%22">Parameter estimation</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: We present a unified framework for determining the inter-aperture separations in multiple-input–multiple-output (MIMO) free space optical (FSO) systems such that the transmitter–receiver paths are resolvable. The analysis framework is also useful in determining the amount of spatial correlation for a given set of system configuration parameters and aperture separations. It is applicable to both point apertures and also apertures with larger diameters and can be used at both transmit and receive arrays. We show that the results obtained via theoretical derivations are in good agreement with those in the literature obtained via measurements or simulations. The theoretical calculations reveal that even under strong turbulence conditions and very long link distances, aperture separations at the order of a few tens of centimeters are sufficient to have resolvable paths with independent fading gains. Furthermore, the channel correlations increase relatively slowly with decreasing inter-aperture separations which are below these values. We also provide design guidelines to obtain resolvable paths for several commonly used system configurations. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Optics Communications is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1016/j.optcom.2015.05.025
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 8
        StartPage: 139
    Subjects:
      – SubjectFull: Optical apertures
        Type: general
      – SubjectFull: Optical correlation
        Type: general
      – SubjectFull: MIMO systems
        Type: general
      – SubjectFull: Free space optical interconnects
        Type: general
      – SubjectFull: Parameter estimation
        Type: general
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      – TitleFull: Inter-aperture correlation in MIMO free space optical systems.
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            NameFull: Koca, Mutlu
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              Text: Oct2015
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              Y: 2015
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              Value: 353
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