多干扰成分的非稳态信号自适应滤波技术  

Adaptive filtering technique for non-stationary signals with multiple interference components

作　　者：石鑫 常自刚 

机构地区：[1]海装西安局,西安710054 [2]海装重庆局,成都610067

出　　处：《智能计算机与应用》2017年第3期72-75,共4页Intelligent Computer and Applications

摘　　要：信号在受到色噪声和白噪声混合干扰下产生非稳态突变,导致信号的检测识别性能下降,需要进行滤波降噪处理,提出一种基于格型陷波器级联的非稳态信号自适应滤波技术。构建直接性陷波器,采用高阶检波技术进行滤波器级联设计,构建二阶格型陷波器,根据滤波器传输函数的幅度和相位响应实现线谱增强和噪声抵消,实现多干扰成分的非稳态信号自适应滤波改进。仿真结果表明,采用该滤波算法构建信号滤波器,能有效去除信号中的干扰噪声成分,提高输出信噪比。Mutations in the non steady state signal generated by mixed inteference of colored noise and white noise,resulting in a decline in the performance of signal detection and recognition,needing to be filtered,based on lattice notch cascaded filter,the paper proposes non steady signal adaptive filtering technology. Construct direct wave trap,use high order detection technique to design cascaded filter,then construct two-order lattice notch filter,based on the amplitude and phase response of the filter transfer function to achieve line enhancement and noise cancellation,realize adaptive filter interference modification of the non steady state signal. The simulation results show that the filter can effectively remove the noise components in the signal and improve the signal to noise ratio.

关 键 词：非稳态信号 自适应 滤波 信噪比 

分 类 号：TN911.2[电子电信—通信与信息系统]