电子学报 ›› 2021, Vol. 49 ›› Issue (10): 1900-1907.DOI: 10.12263/DZXB.20201164
所属专题: 无线光通信及其组网技术; 微波光子与相关元件技术
史芳静, 樊养余, 王鑫圆, 高永胜
收稿日期:
2020-10-20
修回日期:
2021-01-18
出版日期:
2021-11-30
作者简介:
基金资助:
SHI Fang-jing, FAN Yang-yu, WANG Xin-yuan, GAO Yong-sheng
Received:
2020-10-20
Revised:
2021-01-18
Online:
2021-11-30
Published:
2021-10-25
Supported by:
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·Hz2/3.
中图分类号:
史芳静, 樊养余, 王鑫圆, 高永胜. 基于相位调制器的光子射频自干扰消除系统[J]. 电子学报, 2021, 49(10): 1900-1907.
SHI Fang-jing, FAN Yang-yu, WANG Xin-yuan, GAO Yong-sheng. Photonic Radio Frequency Self-Interference Cancellation System Based on Phase Modulators[J]. Acta Electronica Sinica, 2021, 49(10): 1900-1907.
参数 | 取值 |
---|---|
激光器波长 | 1549.14nm |
激光器功率 | 16dBm |
激光器相对强度噪声 | -155dB/Hz |
激光器线宽 | 1MHz |
调制器半波电压 | 4.2V |
调制器差损 | <4dB |
光滤波器波长 | 1260~1650nm |
光滤波器3dB带宽 | 5nm |
EDFA输出功率 | 15dBm |
EDFA噪声系数 | <5dB |
PD响应度 | 0.7A/W |
表1 实验参数设置表
参数 | 取值 |
---|---|
激光器波长 | 1549.14nm |
激光器功率 | 16dBm |
激光器相对强度噪声 | -155dB/Hz |
激光器线宽 | 1MHz |
调制器半波电压 | 4.2V |
调制器差损 | <4dB |
光滤波器波长 | 1260~1650nm |
光滤波器3dB带宽 | 5nm |
EDFA输出功率 | 15dBm |
EDFA噪声系数 | <5dB |
PD响应度 | 0.7A/W |
参考文献 | 工作频率 | 干扰消除量 | SFDR | 优势 | 限制 |
---|---|---|---|---|---|
[ | 0.9~2.4GHz | 单频:> 65dB 宽带:> 30dB | 未测试 | 干扰消除量大,电吸收调制器容易实现集成 | 光纤支路、可调光衰减器及电延迟线必须严格匹配;电吸收调制器的啁啾明显 |
[ | 8~12.4GHz | 单频:> 40dB 宽带:>22dB | 单边带调制频谱效率高;抑制了周期性功率衰落 | 存在直流漂移,系统工作频率范围有限 | |
[ | 0.7~4.8GHz | 宽带:>37dB | 结构简单,低频宽带干扰抑制量大,存在反馈回路,可以实时减少干扰 | 直调激光器带宽有限;光延迟线和可调光衰减器响应速度慢;双光源必须严格相干 | |
[ | 0.7~1.1GHz | 单频:>56dB 宽带:>38dB | 采用反馈回路结合算法处理,在消除干扰的同时最大化有用信号功率 | 双光源必须严格相干;两路光纤的衰减和延时必须严格匹配 | |
本文 | 5~20GHz | 单频:>45dB 宽带:>25dB | 99.4dB·Hz2/3 | 无直流漂移,未使用延时模块,工作频率宽,可实现天线拉远 | 偏振不稳定 |
表2 本方案与现有方案对比
参考文献 | 工作频率 | 干扰消除量 | SFDR | 优势 | 限制 |
---|---|---|---|---|---|
[ | 0.9~2.4GHz | 单频:> 65dB 宽带:> 30dB | 未测试 | 干扰消除量大,电吸收调制器容易实现集成 | 光纤支路、可调光衰减器及电延迟线必须严格匹配;电吸收调制器的啁啾明显 |
[ | 8~12.4GHz | 单频:> 40dB 宽带:>22dB | 单边带调制频谱效率高;抑制了周期性功率衰落 | 存在直流漂移,系统工作频率范围有限 | |
[ | 0.7~4.8GHz | 宽带:>37dB | 结构简单,低频宽带干扰抑制量大,存在反馈回路,可以实时减少干扰 | 直调激光器带宽有限;光延迟线和可调光衰减器响应速度慢;双光源必须严格相干 | |
[ | 0.7~1.1GHz | 单频:>56dB 宽带:>38dB | 采用反馈回路结合算法处理,在消除干扰的同时最大化有用信号功率 | 双光源必须严格相干;两路光纤的衰减和延时必须严格匹配 | |
本文 | 5~20GHz | 单频:>45dB 宽带:>25dB | 99.4dB·Hz2/3 | 无直流漂移,未使用延时模块,工作频率宽,可实现天线拉远 | 偏振不稳定 |
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