摘要
为应对无线设备爆发式增长及复杂城市环境对高精度感知与高速通信融合的迫切需求,提出并验证了一种光子辅助雷达通信联合(JRC)系统。该系统结合光频梳驱动的混沌光电振荡器和色散单元,实现了陷波数量和频率可调的混沌信号生成。陷波混沌信号用于高分辨率雷达探测,陷波频段用于无线信号传输,实现了射频前端硬件和频谱资源共享。实验结果表明,该系统能在2~8 GHz频段内产生具有多个陷波频点的混沌信号,10 min内陷波频率漂移小于6 MHz、抑制比波动小于3.20 dB。雷达单元的距离分辨率可达到2.95 cm,通信单元在3.5 GHz和5.8 GHz陷波频点上实现了64 QAM调制下数据传输速率为180 Mbit/s的无线信号传输,误差矢量幅度分别为4.13%和5.86%。该研究为智慧城市、智能交通等复杂电磁环境下的频谱共享问题提供了有效技术路径,展示了微波光子技术在JRC系统中的应用潜力。
To address the urgent demand for highprecision sensing and highspeed communication integration driven by the explosive growth of wireless devices and complex urban environments,this paper proposes and validates a photonicassisted joint radar and communication(JRC)system.The system combines an optical frequency combdriven chaotic optoelectronic oscillator and dispersion units,achieving tunable notch chaotic signal generation with adjustable quantity and frequency.The notch chaotic signals are used for highresolution radar detection,while the notch frequency bands are utilized for wireless signal transmission,realizing shared radio frequency frontend hardware and spectrum resources.Experimental results demonstrate that the system can generate chaotic signals with multiple notch frequency points in the 2‒8 GHz frequency band,with notch frequency drift less than 6 MHz and suppression ratio fluctuation less than 3.20 dB within 10 min.The radar unit achieves a distance resolution of 2.95 cm,while the communication unit realizes wireless signal transmission at rates of 180 Mbit/s with 64 QAM modulation at 3.5 GHz and 5.8 GHz notch frequency points,with error vector magnitudes of 4.13%and 5.86%,respectively.This research provides an effective technical approach for spectrum sharing problems in complex electromagnetic environments such as smart cities and intelligent transportation systems,demonstrating the application potential of microwave photonic technology in JRC systems.
作者
张钰
王云新
张兴起
张静
金姗
林乾文
Zhang Yu;Wang Yunxin;Zhang Xingqi;Zhang Jing;Jin Shan;Lin Qianwen(School of Physics and Optoelectronic Engineering,Beijing University of Technology,Beijing 100124,China;Department of Electrical and Computer Engineering,University of Alberta,Edmonton T6G 1H9,Canada)
出处
《激光与光电子学进展》
北大核心
2025年第19期358-366,共9页
Laser & Optoelectronics Progress
基金
国家自然科学基金(62275008)
北京市自然科学基金(4242001)。
关键词
微波光子学
雷达通信联合系统
混沌光电振荡器
有限冲激响应滤波器
microwave photonics
joint radar and communication system
chaotic optoelectronic oscillator
finite impulse response filter
