论文标题
具有可变增益继电器的混合RF/FSO系统的精确中断概率分析
Exact Outage Probability Analysis of the Mixed RF/FSO System With Variable-Gain Relays
论文作者
论文摘要
本文介绍了混合射频（RF）/自由空间光学（FSO）继电器系统的统一分析，并具有多个可变的增益放大和前向继电器。使用部分继电器选择（PRS）来选择活动继电器以进行进一步的重新传输。由于第一个RF HOP的快速褪色统计信息，因此假定RF链接的通道状态信息已过时，这既用于继电器增益调整和PRS程序。 RF啤酒花会受到雷利褪色的影响，而FSO Hop受大气湍流和指向错误的影响。由大气湍流引起的光信号的强度波动是由一般的马拉加（M）分布建模的，该分布考虑了多个散射成分的效果。得出了中断概率的精确表达。此外，还提供了高信号到噪声估计的近似值，可用于有效地确定中断概率地板。数值结果通过蒙特卡洛模拟验证，该模拟用于检查系统和通道参数对RF/FSO系统性能的影响。
This paper presents a unified analysis of the mixed radio-frequency (RF)/free-space optics (FSO) relaying system, with multiple variable-gain amplify-and-forward relays. The partial relay selection (PRS) is employed to select the active relay for further re-transmission. Due to fast fading statistics of the first RF hop, it is assumed that the channel state information of the RF link is outdated, which is used for both the relay gain adjustment and the PRS procedure. The RF hops are subject to the Rayleigh fading, while the FSO hop is affected by the atmospheric turbulence and the pointing errors. The intensity fluctuations of the optical signal caused by atmospheric turbulence are modeled by the general Malaga (M) distribution, which takes into account the effect of multiple scattered components. An exact expression for the outage probability is derived. In addition, high-signal-to-noise-ratio approximations are provided, which can be used to efficiently determine the outage probability floor. Numerical results are validated by Monte Carlo simulations, which are used to examine the effects of the system and channel parameters on the RF/FSO system performance.
