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Crosstalk Suppression in Structured Light Free-Space Optical Communication
IEEE Open Journal of the Communications Society Pub Date : 2020-10-06 , DOI: 10.1109/ojcoms.2020.3029116
Dmitrii Briantcev , Abderrahmen Trichili , Boon S. Ooi , Mohamed-Slim Alouini

Using space as an additional degree of freedom is one possible solution to cope with future bandwidth issues. In free-space optics (FSO), spatial multiplexing of structured light modes is limited by the impact of the atmospheric turbulence. Therefore, beating the effects of turbulence is a major problem for structured light-based FSO communication. Here, we model the propagation of Laguerre-Gaussian beams using a modified von Kármán turbulence model with time-dependent turbulence phase screens. We equally investigate the performance of a zero-forcing pre-coding technique to mitigate the effects of turbulence in a full-duplex Laguerre-Gaussian mode based FSO. In the modeling, we account for various limiting factors, including phase estimation errors, noise, imperfect, and outdated channel-state information on the pre-coding approach.

中文翻译:

结构光自由空间光通信中的串扰抑制

使用空间作为额外的自由度是解决未来带宽问题的一种可能的解决方案。在自由空间光学(FSO)中,结构光模式的空间复用受到大气湍流的影响。因此,击败湍流的影响是结构化基于光的FSO通信的主要问题。在这里,我们使用带有依赖于时间的湍流相位屏的改进的vonKármán湍流模型对Laguerre-Gaussian光束的传播进行建模。我们同样调查基于全双工Laguerre-Gaussian模式的FSO的零强迫预编码技术的性能,以减轻湍流的影响。在建模中,我们考虑了各种限制因素,包括预编码方法中的相位估计误差,噪声,不完善和过时的信道状态信息。
更新日期:2020-10-30
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