自适应对消器在多路微弱光信号测量中的应用  

Application of Adaptive Canceller in Multi Channel Weak Optical Signal Measurement System

作　　者：尹利忠 程立勋[1] 李伟[1] 石磊 YIN Li-zhong;CHENG Li-xun;LI Wei;SHI Lei(China Information Technology Designing&Consulting Institute Co.,Ltd.,Zhengzhou Branch,Zhengzhou Henan 450007)

机构地区：[1]中讯邮电咨询设计院有限公司郑州分公司,河南郑州450007

出　　处：《数字技术与应用》2021年第5期32-35,共4页Digital Technology & Application

摘　　要：针对某多通道光纤适配器漏光在线测量系统存在前端光电探测器转换弱电信号传输距离远易耦合外部噪声、光电探测器自身噪声较强、周围白光扰动、电路直流分量随机漂移及50Hz工频干扰的问题,设计了基于最小均方误差准则自适应噪声对消器。通过合理选择滤波器阶数、收敛因子,在STM32F407处理器上成功实现了多路信号的实时处理,有效抑制了噪声,提高了系统测量精度,达到了成本与性能的有效结合。In order to solve the problems of a multi-channel optical fiber adapter leakage on-line measurement system,the front-end photodetector converts weak current signal with long transmission distance,easily coupled with external noise,strong noise of photodetector itself,surrounding white light disturbance,random drift of DC component of circuit and 50 Hz power frequency interference,an adaptive noise canceller based on minimum mean square error criterion is designed.By selecting the order and convergence factor of the filter,the real-time processing of multi-channel signal is realized successfully on stm32f407 processor,which effectively suppresses the noise,improves the measurement accuracy of the system,and achieves the effective combination of cost and performance.

关 键 词：多路微弱光信号 自适应噪声对消 STM32F407 实时信号处理 

分 类 号：TP274.4[自动化与计算机技术—检测技术与自动化装置]