A Survey on Terahertz Communication Theory Assisted by Intelligent Reflecting Surface and Device-to-Device Technologies

Terahertz wireless communication meets the transmission needs of future networks with its ultra-high bandwidth. However, its practical application is seriously restricted by its large path loss and severe blocking effect. The intelligent reflecting surface and device-to-device technologies can be expected to assist terahertz communication to solve the above problems. However, the corresponding research is still at the initial stage. Under the circumstances, this paper summarizes the existing research results and analyzes the potential of application of intelligent reflecting surface and device-to-device technologies in terahertz communication.