Coherent Heterodyne Multilevel Polarization Shift Keying With Spatial Diversity in a Free-Space Optical Turbulence Channel
作者： Xuan Tang , Zabih Ghassemlooy , Sujan Rajbhandari , Wasiu O. Popoola , Chung Ghiu Lee
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摘要: This paper proposes a coherent multilevel polarization shift keying (MPOLSK) modulation scheme using the spatial diversity detection in free-space optical (FSO) turbulence channel. The symbol error probability (SEP) analysis for proposed MPOLSK system under various regimes has been carried out. power penalty caused by phase tracking investigated. For instance, floors of 1.3×10-5 and 3.4×10-3 are observed 8POLSK with variances σΔ = 0.3 0.5, respectively. maximum ratio combining technique applied receiver order to improve SEP performance. To achieve 10-9, gains required 16POLSK-FSO employing four detectors ~5.8, ~15.8, ~13.7 dB weak, moderate, strong regimes,
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