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Second Order Statistics of Mixed RF-FSO Relay Systems and Its Application to Vehicular Networks

机译：混合RF-FSO中继系统的二阶统计量及其在车载网络中的应用

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摘要

This paper considers channel modeling and evaluation of second-order outage statistics of mixed radio frequency/free space optical (RF/FSO) relay systems over mixed turbulence induced fading (TIF) and non-turbulence induced fading (non-TIF) channels. The derived statistics are directly related to the performance measures. In particular, we derive fast computing closed form expressions for relevant statistics such as cumulative-distribution-function (CDF), level-crossing-rate (LCR), and average-fade-duration (AFD). Approximation through Laplace integration of the products of random processes modeled as Gamma-Gamma (G-G) and Nakagami-m (N-m) are exploited. The proposed framework is then applied to two different scenarios for vehicular networks: i) I2I (infrastructure-to-infrastructure) direct communications enabled by FSO link, ii) V2V (vehicle-to-vehicle) communications enabled by RF/FSO/RF AaF (amplify-and-forward) relay link. Moreover, we provide numerical results for various settings of RF/FSO system model parameters.
机译：本文考虑了混合湍流诱导衰落（TIF）和非湍流诱导衰落（non-TIF）信道上的混合射频/自由空间光（RF / FSO）中继系统的二阶中断统计信息的信道建模和评估。得出的统计数据与绩效指标直接相关。尤其是，我们为相关统计数据（例如累积分布函数（CDF），平交率（LCR）和平均淡化持续时间（AFD））导出了快速计算的封闭形式表达式。利用通过Laplace积分对模型为Gamma-Gamma（G-G）和Nakagami-m（N-m）的随机过程的乘积进行逼近。然后将建议的框架应用于车载网络的两种不同方案：i）通过FSO链接启用的I2I（基础设施到基础设施）直接通信，ii）通过RF / FSO / RF AaF启用的V2V（车辆到车辆）通信（放大转发）中继链接。此外，我们为RF / FSO系统模型参数的各种设置提供了数值结果。

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