论文标题
RIS-THZ无线通信与随机相位噪声和未对准的收发器
RIS-THz Wireless Communication with Random Phase Noise and Misaligned Transceiver
论文作者
论文摘要
现有的基于可重构智能表面（RIS）的Terahertz（THZ）系统的研究工作忽略了相位噪声的效果，并在性能分析中采用了自由空间光学通道的零孔指向误差模型。在本文中，我们分析了在每个RIS元素上不完善的相位补偿时，在通道褪色，THZ指向误差（TPE）（TPE）和统计相噪声的综合效果下，RIS-THZ传播的性能。首先，我们通过单个Variate FOX的功能得出了双$α$ -U-un $ $ $ $ $ $ $ $ $ $的统计结果。接下来，我们使用多变量的FOX的H功能表示形式来开发RIS-THZ链路的所得信噪比（SNR）的密度和分布函数的精确分析表达式，考虑到所有RIS元素的累积繁殖效应。使用派生的统计结果，我们分析了被考虑系统的停电概率和平均比特率（BER）的精确和渐近表达式。分析结果表明，系统的多样性顺序与相位噪声无关，取决于通道褪色参数$α$和$ $ $，并且取决于TPE的$β$参数。
Existing research works on reconfigurable intelligent surfaces (RIS) based terahertz (THz) system ignores the effect of phase noise and employ the zero-boresight pointing errors model of the free-space optics channel in performance analysis. In this paper, we analyze the performance of RIS-THz transmission under the combined effect of channel fading, THz pointing error (TPE), and statistical phase noise due to imperfect phase compensation at each RIS element. First, we derive statistical results of the double $α$-$μ$ fading combined with the TPE and phase noise at individual RIS elements using single-variate Fox's function. Next, we use the multi-variate Fox's H-function representation to develop exact analytical expressions for the density and distribution functions of the resultant signal-to-noise ratio (SNR) of the RIS-THz link considering the accumulating propagation effect from all RIS elements. Using the derived statistical results, we analyze the exact and asymptotic expressions for the considered system's outage probability and average bit-error rate (BER). The analytical results show that the diversity order of the system is independent of phase noise, depends on the channel fading parameters $α$ and $μ$, and depends on the $β$ parameter of the TPE.
