论文标题
将RIS辅助源与FSO链接混合
Mixing RIS-Assisted Sources with FSO Link
论文作者
论文摘要
这封信提出并评估了可重新配置的智能表面（RIS）辅助源多源混合射频（RF）/自由空间光学（FSO）中继网络，并具有机会性用户计划。假设RF和FSO通道分别为Rayleigh和Gamma-Gamma褪色模型，则得出了停电概率和平均符号误差概率（ASEP）的封闭形式的分析近似值（ASEP）。此外，为了更多地了解系统行为，以高信噪比（SNR）制度研究了系统，从而得出和分析了多样性顺序和编码增益。结果表明，系统性能由最差的啤酒花主导，多样性顺序等于gd = min（kn，alpha，beta，zeta^2），其中k是rf用户的数量，n是每个用户的反射元素的数量，alpha和beta是alpha and beta的元素，是fso链接的大气湍流参数和zeta^2是fso^2是fso^2是Al fsse^2是Al flse^2。此外，研究结果表明，对于相同的多样性顺序，N比通过编码增益GC对K的系统性能更大。
This letter proposes and evaluates the performance of reconfigurable intelligent surface (RIS)-assisted source multiuser mixed radio frequency (RF)/free space optical (FSO) relay network with opportunistic user scheduling. Closed-form analytical approximations are derived for the outage probability and average symbol error probability (ASEP) assuming Rayleigh and Gamma-Gamma fading models for the RF and FSO channels, respectively. Moreover, to gain more insight into the system behavior, the system is studied at the high signal-to-noise ratio (SNR) regime whereby the diversity order and coding gain are derived and analyzed. The results illustrate that the system performance is dominated by the worst hop and that the diversity order is equal to Gd = min(KN,alpha,beta,zeta^2), where K is the number of RF users, N is the number of reflecting elements at each user, alpha and beta are the atmospheric turbulence parameters of the FSO link, and zeta^2 is a measure for the alignment quality of the FSO link. In addition, findings show that for the same diversity order, N is more impactful on the system performance than K through the coding gain Gc.
