Coherent Heterodyne Multilevel Polarization Shift Keying With Spatial Diversity in a Free-Space Optical Turbulence Channel

被引：62

作者：

Tang, Xuan ^{[1
]}

Ghassemlooy, Zabih ^{[1
]}

Rajbhandari, Sujan ^{[1
]}

Popoola, Wasiu O. ^{[2
]}

Lee, Chung Ghiu ^{[3
]}

机构：

[1] Northumbria Univ, Opt Commun Res Grp, Sch Comp Engn & Informat Sci, Newcastle Upon Tyne NE1 8ST, Tyne & Wear, England

[2] Univ Edinburgh, Inst Digital Commun, Sch Engn, Edinburgh EH8 9YL, Midlothian, Scotland

[3] Chosun Univ, Dept Elect Engn, Kwangju 501759, South Korea

来源：

JOURNAL OF LIGHTWAVE TECHNOLOGY | 2012年 / 30卷 / 16期

关键词：

Coherent detection; free-space optical (FSO); maximum ratio combining (MRC); multilevel polarization shift keying (MPOLSK); spatial diversity; symbol error probability (SEP); turbulence; MODULATION FORMATS; SYSTEMS; COMMUNICATION; TRANSMISSION; PROPAGATION; PHASE;

D O I：

10.1109/JLT.2012.2204859

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper proposes a coherent multilevel polarization shift keying (MPOLSK) modulation scheme using the spatial diversity detection in a free-space optical (FSO) turbulence channel. The symbol error probability (SEP) analysis for the proposed MPOLSK system under various turbulence regimes has been carried out. The power penalty caused by the phase tracking error has been investigated. For instance, the error floors of 1.3 x 10(-5) and 3.4 x 10(-3) are observed for 8POLSK with the phase tracking variances of sigma(Delta) = 0.3 and 0.5, respectively. The maximum ratio combining technique has been applied in the MPOLSK receiver in order to improve the SEP performance. To achieve a SEP of 10(-9), the spatial diversity gains required for a 16POLSK-FSO employing four detectors are similar to 5.8, similar to 15.8, and similar to 13.7 dB in weak, moderate, and strong turbulence regimes, respectively.

引用

页码：2689 / 2695

页数：7

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