A Survey on Terahertz Communications

查看全文 作　　者：Zhi [1]Chen;Xinying [1]Ma;Bo [1]Zhang;Yaxin [1]Zhang;Zhongqian [1]Niu;Ningyuan [1]Kuang;Wenjie [1]Chen;Lingxiang [1]Li;Shaoqian [1]Li

机构地区：[1]National Key Laboratory of Science and Technology on Communications,University of Electronic Science and Technology of China

出　　处：《China Communications》索引2019年第16卷第2期,共35页

基　　金：supported by the National High Technology Research and Development Program of China (863 program) of China under Grant No.2011AA010200; supported by the National Natural Science Foundation of China (NSFC) under Grant No.61771116 and No.91738102 摘　　要：With the exponential growth of the data traffic in wireless communication systems, terahertz(THz) frequency band is envisioned as a promising candidate to support ultra-broadband for future beyond fifth generation(5G), bridging the gap between millimeter wave(mmWave) and optical frequency ranges. The purpose of this paper is to provide a comprehensive literature review on the development towards THz communications and presents some key technologies faced in THz wireless communication systems. Firstly, despite the substantial hardware problems that have to be developed in terms of the THz solid state superheterodyne receiver, high speed THz modulators and THz antennas, the practical THz channel model and the efficient THz beamforming are also described to compensate for the severe path attenuation. Moreover, two different kinds of lab-level THz communication systems are introduced minutely, named a solid state THz communication system and a spatial direct modulation THz communication system, respectively. The solid state THz system converts intermediate frequency(IF) modulated signal to THz frequency while the direct modulation THz system allows the high power THz sources to input for approving the relatively long distance communications. Finally, we discuss several potential application scenarios as well as some vital technical challenges that will be encountered in the future THz communications. 关键词：Terahertz(THz)communications beyond FIFTH generation(5G) SUPERHETERODYNE receiver modulators ANTENNAS channel model BEAMFORMING technical challenges

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A Survey on Terahertz Communications

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