摘要
针对带内全双工(In-band Full Duplex,IBFD)电子系统的收发机自干扰问题,提出了一种基于相位调制器的光子射频自干扰消除系统.利用两个相位调制器在萨格纳克(Sagnac)环中分别实现接收信号和本地参考干扰信号的调制,通过偏振控制最终可在光域中消除自干扰信号.实验结果表明,所提方案最终可以实现超过45dB的单频干扰消除和超过25dB的宽带干扰消除,系统的动态范围可达99.4dB·Hz^(2/3).
To solve the problem of transceiver interference in the in-band full duplex(IBFD)system,a photonic radio frequency interference cancellation system based on phase modulators is proposed.Two phase modulators are used in a Sagnac loop to realize the modulation of the received signal and the local reference interference signal.Proper polarization control in the optical domain can finally cancel the self-interference signal.Experimental results show that the proposed scheme can achieve a single frequency interference suppression of more than 45 dB and a broadband interference suppression of more than 25 dB.The dynamic range of the system can reach 99.4 dB·Hz^(2/3).
作者
史芳静
樊养余
王鑫圆
高永胜
SHI Fang-jing;FAN Yang-yu;WANG Xin-yuan;GAO Yong-sheng(School of Electronics and Information,Northwestern Polytechnical University,Xi’an,Shaanxi 710072,China)
出处
《电子学报》
EI
CAS
CSCD
北大核心
2021年第10期1900-1907,共8页
Acta Electronica Sinica
基金
国家自然科学基金(No.61701412)
全国博士后创新人才支持计划(No.BX201700197)
中国博士后科学基金(No.2017M623238)
陕西省重点研发计划(No.2021GY-096)。
关键词
微波光子
自干扰消除
相位调制器
萨格纳克环
microwave photonics
self-interference cancellation
phase modulator
Sagnac loop
