Towards intelligent reflecting surface empowered 6G terahertz communications: A survey
| Autor: | Zhi Chen, Chong Han, Xinying Ma, Qi-Ye Wen |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Mobile edge computing
Computer Networks and Communications Computer science Wireless network 05 social sciences Bandwidth (signal processing) 050801 communication & media studies 020206 networking & telecommunications 02 engineering and technology Spectral efficiency Capacity optimization 0508 media and communications 0202 electrical engineering electronic engineering information engineering Electronic engineering Resource allocation Electrical and Electronic Engineering Communication channel Vulnerability (computing) |
| Zdroj: | China Communications. 18:93-119 |
| ISSN: | 1673-5447 |
| Popis: | Terahertz (THz) communications have been widely envisioned as a promising enabler to provide adequate bandwidth and achieve ultra-high data rates for sixth generation (6G) wireless networks. In order to mitigate blockage vulnerability caused by serious propagation attenuation and poor diffraction of THz waves, an intelligent reflecting surface (IRS), which manipulates the propagation of incident electromagnetic waves in a programmable manner by adjusting the phase shifts of passive reflecting elements, is proposed to create smart radio environments, improve spectrum efficiency and enhance coverage capability. Firstly, some prospective application scenarios driven by the IRS empowered THz communications are introduced, including wireless mobile communications, secure communications, unmanned aerial vehicle (UAV) scenario, mobile edge computing (MEC) scenario and THz localization scenario. Then, we discuss the enabling technologies employed by the IRS empowered THz system, involving hardware design, channel estimation, capacity optimization, beam control, resource allocation and robustness design. Moreover, the arising challenges and open problems encountered in the future IRS empowered THz communications are also highlighted. Concretely, these emerging problems possibly originate from channel modeling, new material exploration, experimental IRS testbeds and intensive deployment. Ultimately, the combination of THz communications and IRS is capable of accelerating the development of 6G wireless networks. |
| Databáze: | OpenAIRE |
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