太赫兹频段高速移动场景参考信号方案研究  

Research on reference signal scheme for high-mobility scenarios in the Terahertz frequency band

作　　者：刘利平 暴桐[1,2] 辛雨 胡留军 LIU Liping;BAO Tong;XIN Yu;HU Liujun(State Key Laboratory of Mobile Network and Mobile Multimedia Technology,Shenzhen 518055,China;ZTE Corporation,Shenzhen 518057,China)

机构地区：[1]移动网络和移动多媒体技术国家重点实验室,广东深圳518055 [2]中兴通讯股份有限公司,广东深圳518057

出　　处：《电信科学》2024年第8期34-41,共8页Telecommunications Science

摘　　要：针对太赫兹频段高速移动场景,提出了一种参考信号方案——增强型离散傅里叶变换扩展正交频分复用(E DFT-s-OFDM)DMRS:将具有循环前缀(CP)和循环后缀(CS)的参考信号序列分割为首部和尾部参考信号序列,然后分别嵌入每个OFDM符号的尾部和首部。这种方案的优点在于,前一个OFDM符号的尾部和后一个OFDM符号的首部构成一个完整的参考信号序列,从而允许接收端在每个OFDM符号间隔内都能进行信道估计,提高了信道估计的精度和实时性。此外,相邻OFDM符号的首部和尾部参考信号序列相同,从而省去了每个OFDM符号的传统循环前缀(CP),提高了频谱效率。仿真结果表明,在太赫兹频段高速移动场景下,与5G NR DFT-s-OFDM波形的DMRS方案相比,该方案的信道估计更精确,通信系统的频谱效率更高。A novel reference signal scheme,E DFT-s-OFDM DMRS was proposed for high-mobility scenarios in the Terahertz band.The proposed scheme involved segmenting the reference signal sequence with cyclic prefix and cyclic suffix into a head and tail reference signal sequence.These sequences were then embedded into the tail and head of each OFDM symbol,respectively.The scheme had the advantage of using a complete reference signal sequence formed by the tail of the preceding OFDM symbol and the head of the following OFDM symbol.This allowed the receiver to perform channel estimation in each OFDM symbol interval,improving the accuracy and real-time performance of channel estimation.Furthermore,adjacent OFDM symbols share identical head and tail reference signal sequences,eliminating the traditional cyclic prefix for each OFDM symbol and improving spectral efficiency.Simulation results demonstrate that this scheme provides more precise channel estimation and greater spectral efficiency than DMRS scheme with 5G NR DFT-s-OFDM waveform for high-mobility scenarios in the Terahertz band.

关 键 词：太赫兹频段 高速移动场景 参考信号 信道估计 频谱效率 

分 类 号：TN914[电子电信—通信与信息系统]