一种光载太赫兹通感高阶正交幅度调制与线性调频信号的产生与传输分析  

Generation and Transmission Analysis on Multi-Order Quadrature Amplitude Modulation and Linear Frequency Modulation Signals of Optical Carrier Terahertz with Integrated Communication and Sensing

作　　者：左延群 赵峰 王琎 钱强 候帅帅 段云飞 孔令杰 Zuo Yanqun;Zhao Feng;Wang Jin;Qian Qiang;Hou Shuaishuai;Duan Yunfei;Kong Lingjie(School of Electronic Engineering,Xi'an University of Posts&Telecommunications,Xi'an 710121,Shaanxi,China;School of Communications and Information Engineering,Xi'an University of Posts&Telecommunications,Xi'an 710121,Shaanxi,China)

机构地区：[1]西安邮电大学电子工程学院,陕西西安710121 [2]西安邮电大学通信与信息工程学院,陕西西安710121

出　　处：《光学学报》2024年第13期26-37,共12页Acta Optica Sinica

摘　　要：针对6G技术愿景中的高速率通信和高精度感知一体化的需求,提出了一种基于高阶正交幅度调制与线性调频(MQAM-LFM)的太赫兹通感一体化信号的产生与传输方案。理论分析了通感一体化信号的产生、传输、感知与接收原理,利用VPI Transmission和MATLAB仿真软件联合仿真验证了通感一体化信号的通信性能、感知性能和通感性能边界。结果表明:在相同波特率下,MQAM-LFM信号相比正交幅度调制(QAM)信号的通信性能在一定程度内有所降低,但MQAM-LFM信号相对于线性调频(LFM)信号的测距分辨率得到了一定的提升;同时,在相同测距条件下,MQAMLFM信号的感知精度比LFM信号提高了约1.8倍。在现有的器件条件下,本方案可实现40 Gbit/s的通信速率和1.3 cm的距离分辨率,为未来高速率通信和高精度感知通感一体化信号的实现提供了技术参考。Objective With the maturity and commercialization of 5G/5G-A technology, research on 6G technology has been on the agenda. As a more advanced next-generation mobile communication technology, 6G technology has stronger service capabilities and has gradually evolved from a simple communication service to a complex service integrating communication, sensing, and computing power. Additionally, in the future, the application scenarios of 6G technology will be more extensive, and be applied to smart healthcare, smart transportation, smart cities, smart factories, and other fields. In these application scenarios, communication services and sensing services should be included at the same time.Therefore, in the future, 6G networks should have both communication and sensing capabilities. In short, in the future 6G communication network, communication and sensing functions will be highly integrated, and gradually evolve into communication and sensing integration. With the continuous development of new services, the demand for high-speed data transmission and low-latency communication is growing day by day, but the current wireless frequency band cannot meet this demand. Thus, it is necessary to explore higher-frequency bands, and meanwhile the terahertz bands with rich spectrum resources are suitable for the application scenarios of ultra-high-speed communication transmission and can meet the needs of current and future communication networks. Therefore, we conduct a generation and transmission analysis on multi-order quadrature amplitude modulation and linear frequency modulation(MQAM-LFM) signals of optical carrier terahertz with integrated sensing and communication(ISAC). Additionally, a single intensity modulator is adopted to generate a terahertz ISAC signal, which can achieve high-speed communication and high-precision perception and provide references for the development of 6G communication and sensing integration technology in the future.Methods We employ MATLAB and VPI Transmission simulation softwares. First, a ce

关 键 词：高阶矢量调制 一体化信号 线性调频信号 马赫-曾德尔调制器 

分 类 号：O436[机械工程—光学工程]