基于16QAM-LFM的光载太赫兹通感信号产生与传输分析  

Generation and transmission analysis of integrated sensing and communication signals for photon-assisted terahertz based on 16QAM-LFM

作　　者：赵峰 孔令杰 左延群 王琎 段云飞 钱强 侯帅帅 ZHAO Feng;KONG Lingjie;ZUO Yanqun;WANG Jin;DUAN Yunfei;QIAN Qiang;HOU Shuaishuai(School of Electronic Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,China;Shaanxi Key Laboratory of Information Communication Network and Security,Xi’an University of Posts and Telecommunications,Xi’an 710121;School of Communications and Information Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,China)

机构地区：[1]西安邮电大学电子工程学院,陕西西安710121 [2]陕西省信息通信网络及安全重点实验室,陕西西安710121 [3]西安邮电大学通信与信息工程学院,陕西西安710121

出　　处：《西安邮电大学学报》2025年第2期9-18,共10页Journal of Xi’an University of Posts and Telecommunications

基　　金：国家自然科学基金项目(62375219);陕西省自然科学基金项目(2023-JC-JQ-58);陕西省创新能力支撑计划项目(2021TD-09)。

摘　　要：为了融合通信与感知波形,提升频谱利用率,设计了一种通信感知一体化的光子辅助太赫兹系统,基于此系统对信号产生和传输进行分析。将16正交幅度调制(Quadrature Amplitude Modulation,QAM)信号编码到线性调频信号(Linear Frequency Modulation,LFM)上,实现通信与感知波形的融合。基于一体化信号产生与传输原理及通信和感知端接收原理,仿真分析不同输入光功率、不同带宽分配和不同直流偏置下该系统的性能及通信感知性能边界。实验结果表明,该系统通过光子辅助拍频在124 GHz频段上实现1.7 cm分辨率的距离感知,在9.6 m距离下完成最高24 Gbit·s^(-1)的无线通信,且通信误码率达到前向纠错硬判决阈值。该系统可以避免复用一体化系统因频率时间等资源复用带来的串扰与浪费,能提升一体化信号的频谱利用率。A photon-assisted terahertz system is designed to integrate communication and sensing waveforms and to enhance spectrum efficiency.Signal generation and transmission are analyzed based on the designed system.The system encodes 16-quadrature amplitude modulation(QAM)signals onto linear frequency modulated(LFM)signals,to achieve the integration of communication and sensing waveforms.Based on the principles of integrated signal generation and transmission,as well as the reception at the communication and sensing ends,the performances of the integrated system and the boundary of communication and sensing function under different input optical powers,bandwidth allocations,and DC biases are simulated and analyzed.Experiment results show that the system achieves a distance resolution of 1.7 cm using photon-assisted beat-frequency technology at 124 GHz for distance sensing.Moreover,it successfully accomplishes wireless communication at a maximum rate of 24 Gbit·s^(-1)at a distance of 9.6 m,with the communication bit error rate reaching the hard decision threshold of forward error correction.The system can avoid the interference and resource waste from the frequency and time integrated systems,and can improves spectrum efficiency of the integrated signal.

关 键 词：太赫兹通信 光载太赫兹 一体化波形 概率整形 正交幅度调制 第六代移动通信系统 

分 类 号：TN929.1[电子电信—通信与信息系统]