DocumentCode :
60048
Title :
MIMO architecture for coherent optical wireless communication: System design and performance
Author :
Mingbo Niu ; Cheng, James ; Holzman, J.F.
Author_Institution :
Sch. of Eng., Univ. of British Columbia, Kelowna, BC, Canada
Volume :
5
Issue :
5
fYear :
2013
fDate :
May-13
Firstpage :
411
Lastpage :
420
Abstract :
A coherent multiple-input multiple-output architecture is proposed for optical wireless communications (OWCs) to mitigate atmospheric turbulence effects. Transmitter optical signals operate at distinct carrier frequencies to allow the received optical signals to be separately processed. The accumulated phase noise in each transmission branch can then be independently and electrically compensated. Based on the proposed architecture, several diversity combining techniques are used at the receiver end for system performance evaluation. Three different turbulence models are considered in this paper for different scintillation level ranges, including gamma-gamma turbulence, K-distributed turbulence, and negative exponential turbulence. Closed-form error rate expressions are derived using a series expansion approach. The diversity order in the gamma-gamma turbulence channel is found to depend only on the smaller channel parameter, while the K-distributed and negative exponential turbulence channels are found to have the same diversity order. The presented numerical results demonstrate substantial system performance improvement over single-link coherent OWC.
Keywords :
MIMO communication; atmospheric optics; atmospheric turbulence; optical design techniques; optical links; optical noise; optical receivers; optical transmitters; performance evaluation; phase noise; radio receivers; radio transmitters; scintillation; series (mathematics); wireless channels; K-distributed turbulence; MIMO architecture; atmospheric turbulence effects; carrier frequency; channel parameter; closed-form error rate expression; coherent multiple-input multiple-output architecture; coherent optical wireless communication; gamma-gamma turbulence channel; negative exponential turbulence channel; phase noise; received optical signals; receiver end; scintillation level; series expansion approach; single-link coherent OWC; system design; system performance evaluation; transmission branch; transmitter optical signals; turbulence models; Multiple-input multiple-output; Optical wireless communication; Turbulence channels; Wavelength diversity;
fLanguage :
English
Journal_Title :
Optical Communications and Networking, IEEE/OSA Journal of
Publisher :
ieee
ISSN :
1943-0620
Type :
jour
DOI :
10.1364/JOCN.5.000411
Filename :
6515885
Link To Document :
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