刘利平
1,2，菅梦楠
1,2，陈艺戬
1,2
（1. 移动网络和移动多媒体技术国家重点实验室，中国 深圳 518055；2. 中兴通讯股份有限公司，中国 深圳 518057）
摘要：作为6G潜在技术之一，太赫兹技术对数据速率提升、超密集连接、低时延传输等具有积极作用。首先阐述了太赫兹技术的传播特性和信道建模方法。根据传播特性确定了大尺度、小尺度和微尺度3个维度的太赫兹应用场景。接着，针对太赫兹特殊的频谱特性，设计了物理层波形、调制编码、超大规模多输入多输出（UM-MIMO），以及媒体接入控制（MAC）层波束管理方案。最后，关注了适用于太赫兹频段的智能超表面（RIS）技术，探讨了RIS关键使能技术与方案设计。
关键词：太赫兹；传播模型；应用场景；基带处理；智能超表面
Development and Challenges of Terahertz Technology for 6G Applications
LIU Liping, JIAN Mengnan, CHEN Yijian
（State Key Laboratory of Mobile Network and Mobile Multimedia Technology, Shenzhen 518055, China; ZTE Corporation, Shenzhen 518057, China）
Abstract: As one of the potential technologies for 6G system, terahertz technology facilitates data-rate improvement, ultra-dense connection and low-latency transmission. The propagation characteristics and channel modeling methods of terahertz band are studied in this paper. Based on the special spectrum characteristics of terahertz, three kinds of terahertz application scenarios, i.e., macro-scale, micro-scale and nano-scale, are analyzed. Then, potential schemes to design physical layer waveform, modulation and coding, ultra massive multiple-input multiple-output (UM-MIMO), and media access control (MAC) layer beam management in terahertz system schemes are given. Finally, the reconfigurable intelligent surface (RIS) technology is introduced which is applicable to the terahertz frequency. The key enabling technologies and solutions for RIS are discussed.
Keywords: terahertz; propagation model; application scenario; baseband signal processing; reconfigurable intelligent surface
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