Prospects and Challenges of THz Precoding  

作　　者：GUO Rongbin TANG Yajie ZHANG Changming LIU Shanyun ZHAO Zhifeng 

机构地区：[1]Zhejiang Laboratory,Hangzhou 311100,China

出　　处：《Chinese Journal of Electronics》2022年第3期488-498,共11页电子学报（英文版）

基　　金：supported in part by the National Key Research and Development Program of China(2021YFB2800800,2020YFB1805700,2018YFB1801500,2018YFB2201700);Zhejiang Lab(2020LC0AA02,2021LC0PI01,2020LC0AD01);the National Natural Science Foundation of China(61771424);the Natural Science Foundation of Zhejiang Province(LQ21F010002,LZ18F010001);the Key Research and Development Program of Zhejiang Province(2021C04006)。

摘　　要：Terahertz(THz) communications are considered as very promising for the sixth-generation(6 G) ultra-dense wireless networks. However, THz signals suffer from well-known severe path loss, which consequently shortens the coverage of THz communication systems. To deal with this issue, precoding technique is expected to be beneficial to extend the limited coverage by providing directional beams with ultra large number of antenna arrays. In this paper, we overview the state-ofthe-art developments of THz precoding techniques such as reconfigurable intelligent surface based precoding, hybrid digital-analog precoding and delay-phase precoding. Based on the survey, we summarize several open issues remaining to be addressed, and discuss the prospects of a few potential research directions on THz precoding, such as one-bit precoding, precoding for hardware impairments and THz security precoding. This overview will be helpful for researchers to study innovative solutions of THz precoding in the future 6 G wireless communications.

关 键 词：THz precoding Reconfigurable intelligent surface Hybrid precoding Beam spilt 

分 类 号：TN929.5[电子电信—通信与信息系统]