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Outage probability and average BER estimation of FSO system employing wavelength diversity

机译:利用波长分集的FSO系统的中断概率和平均BER估计

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Free space optical (FSO) communication has gained significant attention among researchers for high bandwidth and secured data transfer applications. However, its performance is limited by the local atmospheric conditions. This paper focusses on an FSO system employing a diversity method to compensate signal loss occurred due to atmospheric turbulence conditions varying from moderate to strong. We derive a closed-form expression for two important parameters, viz.: average bit error rate (BER) and outage probability over gamma-gamma distribution channel. The numerical results for different combining schemes are presented in this paper. Enhancement in reliability and performance of FSO communication system with wavelength diversity is investigated. Effect of different wavelengths 850 nm, 1310 nm and 1550 nm on average BER is analysed and minimum BER is achieved for optimal combining at 1550 nm at diversity order R=3.
机译:对于高带宽和安全的数据传输应用,自由空间光(FSO)通信已引起研究人员的极大关注。但是,其性能受到当地大气条件的限制。本文关注于采用分集方法的FSO系统,以补偿由于大气湍流条件(从中等到强烈)而发生的信号损失。我们为两个重要参数(即:平均误码率(BER))和伽玛-伽玛分布通道上的中断概率推导了闭式表达式。给出了不同组合方案的数值结果。研究了具有波长分集的FSO通信系统在可靠性和性能方面的增强。分析了不同波长850 nm,1310 nm和1550 nm对平均BER的影响,并获得了最小BER,以便在分集阶数R = 3的1550 nm处实现最佳组合。

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