摘要
光子太赫兹通信具有大带宽、低传输损耗等优势,故成为6G超高速无线通信的研究热点。由于极低的用户端复杂性和成本,基于非相干的包络检波太赫兹接收技术备受关注。提出了一种多带非相干光子太赫兹通信系统。通过多带自适应调制,实现高性能太赫兹点对多点覆盖传输;此外,通过光域自适应滤波,抑制非相干包络检波时多带之间的信号-信号拍频串扰,实现每个子带信号的低算法复杂度和低功耗接收。实验中,根据系统的传输响应,3个子带分别使用5.75 G Baud 64QAM、16QAM和4QAM的自适应调制方式;再通过自适应单边带光滤波,接收端仅使用最小均方均衡算法即成功实现了300 GHz频段多带太赫兹信号的2 m无线传输。
Photonic terahertz(THz)communication has emerged as a prominent research area in 6G ultra-high-speed wireless communication,owing to its remarkable benefits of large bandwidth and low transmission loss.The incoherent envelope detection-based THz reception technology has garnered attention for its low user-side complexity and cost-effectiveness.This paper presents a novel multi-band incoherent photonic THz communication system that achieves high-performance THz point-to-multipoint coverage transmission via multi-band adaptive modulation.Moreover,optical domain adaptive filtering is incorporated to mitigate the signal-to-signal beat interference(SSBI)between multiple bands during incoherent envelope detection,facilitating low algorithmic complexity and low power consumption reception for each sub-band signal.In the experiment,adaptive modulation schemes of 5.75 GBaud 64QAM,16QAM,and 4QAM are applied to three sub-bands,respectively,based on the system's transmission response.By leveraging adaptive single-sideband optical filtering and employing the minimum mean square equalization algorithm,successful wireless transmission of multi-band THz signals in the 300 GHz frequency range is accomplished over a distance of 2 meters.
作者
雷明政
方苗苗
朱敏
蔡沅成
张教
华炳昌
田亮
LEI Mingzheng;FANG Miaomiao;ZHU Min;CAI Yuancheng;ZHANG Jiao;HUA Bingchang;TIAN Liang(Purple Mountain Laboratories,Nanjing 211111,China;National Mobile Communications Research Laboratory,Southeast University,Nanjing 210096,China)
出处
《移动通信》
2023年第5期38-45,共8页
Mobile Communications
基金
国家自然科学基金(62201393,62271135)
国家重点研发项目(2022YFB2903800)
鹏城实验室重点项目(PCL2021A01-2)。
关键词
光子太赫兹通信
包络检波
自适应调制
自适应光滤波
信号-信号拍频串扰
photonics-assisted terahertz(THz)communication
envelope detection
adaptive modulation
adaptive optical filtering
signal-to-signal beat interference(SSBI)
作者简介
雷明政,博士,现任紫金山实验室光通信研究员,兼任东南大学专业硕士校外导师,主要研究方向为光子学毫米波/太赫兹通信、微波光子雷达、通信感知一体化;方苗苗,东南大学微电子学晓在读硕士研究生,研究方向为光子学毫米波/太赫兹通信;通信作者:朱敏,东南大学移动通信全国重点实验室副教授,紫金山实验室课题组负责人,主要研究方向为面向6G的超宽带光子太赫兹/毫米波通信技术、基于深度强化学习的光无线网络切片资源优化配置技术。
