4.7 Article

Ultra Wideband THz IRS Communications: Applications, Challenges, Key Techniques, and Research Opportunities

期刊

IEEE NETWORK
卷 36, 期 6, 页码 214-220

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/MNET.110.2100664

关键词

Radio frequency; Antennas; Power demand; Precoding; System performance; Directive antennas; Receivers

资金

  1. National Natural Science Foundation of China [62101499, 62071223, 62031012]
  2. Young Elite Scientist Sponsorship Program by CAST
  3. Natural Sciences and Engineering Research Council of Canada through Discovery Program

向作者/读者索取更多资源

This article investigates the application and challenges of ultra-wideband terahertz intelligent reflecting surface (IRS) communications and proposes several effective key techniques to overcome these challenges.
Terahertz (THz) communication is a promising technology for future wireless networks due to its ultra-wide bandwidth. However, THz signals suffer from severe attenuation and poor diffraction capability, making it vulnerable to blocking obstacles. To compensate for these two shortcomings and improve the system performance, an intelligent reflecting surface (IRS) can be exploited to change the propagation direction and enhance the signal strength. In this article, we investigate this promising ultra wideband (UWB) THz IRS communication paradigm. We start by motivating our research and describing several potential application scenarios. Then we identify major challenges faced by UWB THz IRS communications. To overcome these challenges, several effective key techniques are developed: the time delayer-based sparse radio frequency antenna structure, delay hybrid precoding, and IRS deployment. Simulation results are also presented to compare the system performance for these proposed techniques, thus demonstrating their effectiveness. Finally, we highlight several open issues and research opportunities for UWB THz IRS communications.

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