在复合马拉加流色通道上随机干扰FSO通信系统的性能分析
概括
本研究分析了面临随机干扰的自由空间光学 (FSO) 通信系统. 结果显示,干扰显著降低了FSO性能,比高斯噪声更大,特别是在低概率的干扰器.
科学领域:
- 光学通信是指光学通信.
- 无线通信系统无线通信系统
- 信号处理 信号处理
背景情况:
- 自由空间光学 (FSO) 系统提供高带宽,但容易受到大气条件和干扰的影响.
- 随机干扰对FSO连接的可靠性和安全性构成重大威胁.
- 了解干扰下性能退化对于稳健的FSO系统设计至关重要.
研究的目的:
- 在随机干扰下分析FSO通信系统的性能.
- 使用马拉加 (M) 通道模型研究指向错误和大气衰减的影响.
- 为了获得关键性能指标的分析表达式,并通过模拟验证它们.
主要方法:
- 对通道,信号对干扰比率 (SJR) 和信号对噪声比率 (SNR) 的概率密度函数的推导.
- 开发封闭式表达式,以计算 ergodic 通道容量,中断概率和平均位错误率 (BER).
- 使用蒙特卡洛模拟进行性能验证.
主要成果:
- 随机干扰对FSO性能的影响比高斯白噪声更为不利.
- 该研究量化了各种指标在干扰下性能退化.
- 观察到一个脉冲干扰效应,低概率的干扰器在高SJR区域具有显著的影响.
结论:
- FSO系统需要强大的反干扰策略来减轻性能损失.
- 马拉加运河模型有效地捕捉了FSO传播的复杂性,并指出了误差.
- 由此产生的分析表达式为FSO系统设计和性能评估提供了有价值的工具.
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