Outage Probability of Reconfigurable Intelligent Surface Aided THz Communications
Published in IEEE/CIC International Conference on Communications in China (ICCC), 2021
Recommended citation: Huahua Xiao, Hongyang Du, Jiayi Zhang, Ke Guan, and Bo Ai. “Outage Probability of Reconfigurable Intelligent Surface Aided THz Communications.” In IEEE/CIC International Conference on Communications in China (ICCC), pp. 415-420., 2021. https://ieeexplore.ieee.org/document/9580430
Abstract: TeraHertz (THz) communications are envisioned to help satisfy the ever-high data rates demand with massive bandwidth. However, THz signals are sensitive to blockage. With the help of the recently proposed reconfigurable intelligent surface (RIS) technology, we investigate a RIS-aided THz communication system. More specifically, we first prove that we can use the fluctuating two-ray distribution to model the small-scale amplitude fading of THz signals based on recent measurements. Furthermore, a novel swarm intelligence-based method is proposed to optimize the phase shifts at the RIS elements under discrete constraints. Finally, we investigate exact statistical characterizations of end-to-end signal-to-noise plus distortion ratio and derive closed-form outage probability. Monte-Carlo simulations are provided to validate the accuracy of our results. It is interesting to find that the impact of path loss is more pronounced compared to others, and increasing the number of elements at the RIS can significantly improve the performance of the THz communications.
Fig. 5: Outage probability versus the transmit power.