基于反馈机制的光子微波信号级联滤波方法  

Cascaded filtering method for photonic microwave signals based on feedback mechanism

作　　者：朱艳龙[1] 李凯勇[2] ZHU Yanlong;LI Kaiyong(Baotou Teachers’College College Inner Mongolia University of Science and Technology,Baotou 014030,China;Qinghai Nationalities University Physics and Electronic Information Engineering,Xining 810007,China)

机构地区：[1]内蒙古科技大学包头师范学院,内蒙古包头014030 [2]青海民族大学物理与电子信息工程学院,青海西宁810007

出　　处：《激光杂志》2024年第2期203-207,共5页Laser Journal

基　　金：青海省重点研发与转化计划项目(No.2022-QY-205);包头师范学院科研项目(No.BSYKJ2022-DY01)。

摘　　要：光子微波通信过程中,受噪声影响造成带宽变窄,降低了通信效率。为了优化光子微波通信质量,提出基于反馈机制的光子微波信号级联滤波方法。利用形态学腐蚀和膨胀去除信号模糊程度后,将相似度较高的信号聚集为连续区域,完成微波信号去噪。选用卡尔曼滤波器对微波信号测量噪声初次滤波,使用均值滤波以及双门限输出方案二次滤波双路光电反馈下生成的微波信号。通过两种滤波器的级联处理,去除微波信号中不同的杂波,实现窄线宽光子微波信号级联滤波。实验结果表明,所提方法级联滤波波动幅度小,能够平稳输出滤波结果,且不同温度下的级联滤波衰减特性相对平稳。In the process of photonic microwave communication,the bandwidth is narrowed due to the impact of noise,reducing communication efficiency.In order to optimize the quality of photonic microwave communication,a cascade filtering method for photonic microwave signals based on feedback mechanism is proposed.After removing the ambiguity of the signal using morphological erosion and dilation,the signals with high similarity are clustered into continuous regions to complete microwave signal denoising.The Kalman filter is selected to filter the microwave signal measurement noise for the first time,and the mean filtering and dual threshold output scheme are used to filter the microwave signal generated under dual photoelectric feedback for the second time.Through the cascade processing of two filters,different clutter in the microwave signal is removed,and the cascade filtering of narrow linewidth photonic microwave signals is realized.Experimental results show that the proposed cascaded filter has a small amplitude of wave motion,can stably output the filtering results,and the attenuation characteristics of the cascaded filter at different temperatures are relatively stable.

关 键 词：光子微波 双路光电反馈 微波信号 级联滤波 卡尔曼滤波器 

分 类 号：TN929[电子电信—通信与信息系统]