面向6G的高速太赫兹无线通信系统与关键技术验证

High Speed Terahertz Wireless Communication System and Key Technology Verification for 6G

太赫兹通信以其可提供更高速、更大容量和更安全的数据传输的独特优势,在未来6G中成为重要的关键技术之一。基于固态电子的太赫兹通信系统存在带宽受限、频谱响应不平坦等问题,需要先进的信号形式结合灵活高效的处理方法来提升系统性能。搭建了基于固态电子的G波段太赫兹无线通信系统,通过采用比特-功率加载的离散多音(Bit and Power Loading-Discrete Multitone, BPL-DM)调制技术,实现了对系统频谱资源的有效利用;通过对通信速率的灵活调整、自适应削波和基于三阶多项式的后均衡技术,解决了峰值功率约束带来的挑战,提升了整体传输性能,实现了在195 GHz中心频率下,单通道130 Gbit/s的通信线路速率。基于以上技术,为进一步提升系统容量,搭建了4×4的多输入多输出(Multiple-Input Multiple-Output, MIMO)太赫兹通信系统,总线路速率超过399 Gbit/s。

In future 6G,terahertz communication will become one important key technology due to its unique advantages of providing faster speed,larger capacity,and safer data transmission.However,terahertz communication systems based on solid-state electronics have issues such as bandwidth limitations and uneven spectrum,requiring advanced signal forms combined with flexible and efficient processing methods to improve system performance.In this study,a G-band terahertz wireless communication system based on solid-state electronics was constructed.To address these challenges,the use of discrete multitone modulation with Bit and Power Loading-Discrete Multitone(BPL-DM)Technology was implemented,enabling effective utilization of system spectrum resources and flexible adjustment of data rate.Adaptive clipping and post-equalization technology based on third-order polynomials were employed to overcome peak power constraints,thereby improving overall transmission performance.Experimental verification achieved a single channel line data rate of 130 G bit/s at a center frequency of 195 GHz.Based on these technologies,a 4×4 Multiple-Input Multiple-Output(MIMO)terahertz communication system was developed in order to enhance system capacity,attaining a total line speed of over 399 Gbit/s.