基于微波光子信号稳相传输的多路信号增强技术  

Multi-channel signal enhancement technology based on microwave photonic phase-stabilized transmission

作　　者：欧阳竑[1] 谢仕锋 王侠[1] 曾永福[1] 李跃 尹思杰 代丰羽[1] 杨万里 尹怡辉[1] OUYANG Hong;XIE Shifeng;WANG Xia;ZENG Yongfu;LI Yue;YIN Sijie;DAI Fengyu;YANG Wanli;YIN Yihui(The 34th Research Institute of CETC,Guilin Guangxi 541004,China)

机构地区：[1]中国电子科技集团公司第三十四研究所,广西桂林541004

出　　处：《光通信技术》2025年第2期81-84,共4页Optical Communication Technology

基　　金：国家自然科学基金项目(U2441250)资助;广西科技计划项目(AD24010060)资助。

摘　　要：针对信号在光纤中传输时受到外部环境因素影响,导致传输的光载射频信号相位出现抖动,影响多路信号相干叠加后的信噪比问题,提出一种基于微波光子信号稳相传输的多路信号增强技术。通过设计包含相位测量、控制与调节模块的稳相传输系统,结合闭环测量和精度调节(粗调10 ps、精调0.1 ps),实现光载射频信号的相位稳定;进一步搭建多路信号传输系统,采用匹配滤波和相位精确合成方法,完成3路信号的相干叠加。实验结果表明:在1.7、2.3 GHz频率下,叠加后的信号功率较单路信号分别提升4.5、5.1 d B,信噪比分别改善2.8、3.44 d B。To address the phase jitter in optical-carried radio frequency signals caused by environmental factors during fiber transmission,which degrades the signal-to-noise ratio after multi-channel coherent superposition,this paper proposes a multi-channel signal enhancement technique based on microwave photonic phase-stabilized transmission.A phase-stabilized transmission system incorporating phase measurement,control,and adjustment modules is designed,achieving stable radio frequency signal phases through closed-loop measurement and precision regulation(10 ps coarse adjustment and 0.1 ps fine adjustment).A multi-channel transmission system is further constructed to realize coherent superposition of three signals using matched filtering and precise phase synthesis.The experimental results demonstrate power enhancements of 4.5 dB and 5.1 dBm at 1.7 GHz and 2.3 GHz respectively,with signal-to-noise ratio improvements of 2.8 dB and 3.44 dB compared to single-channel transmission.

关 键 词：微波光子 稳相传输 多路信号 信号增强 

分 类 号：TN015[电子电信—物理电子学]