基于LabVIEW和MATLAB混合编程的实时自适应滤波系统  

Real-time Adaptive Filtering Noise Reduction System Based on LabVIEW and MATLAB Hybrid Programming

作　　者：任静宜 古琳 龙盛蓉[1] REN Jingyi;GU Lin;LONG Shengrong(School of Testing and Optoelectronic Engineering,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]南昌航空大学测试与光电工程学院

出　　处：《电子产品可靠性与环境试验》2020年第1期12-17,共6页Electronic Product Reliability and Environmental Testing

摘　　要：利用电脑声卡提供声音信号,采用LabVIEW软件采集实时声音信号并进行频谱功率谱分析。在MATLAB中设计基于LMS算法自适应滤波器函数,通过LabVIEW和MATLAB交互技术,生成基于.net技术的DLL文件。在LabVIEW中,通过构造器节点调用封装成子VI后加入声音采集模块。通过自适应滤波器良好的自动跟踪迭代得到了最优的滤波效果,并在前面板中显示波形。实验结果表明,通过该滤波系统后,实时声音信号噪声得到了及时处理,提高了实时声音识别的效率。The sound signal is provided by the computer sound card,and the real-time sound signal is collected and the spectrum and power spectrum analysis is carried out by LabVIEW software.The adaptive filter function based on LMS algorithm is designed in MATLAB,and the DLL file based on.net technology is generated by LabVIEW and MATLAB interaction technology.In LabVIEW,the Sub-VI is encapsulated by the constructor node call and added to the sound collection module.The optimal filtering effect is obtained by good automatic tracking interation of adaptive filter,and the waveform is displayed in the front panel.The experimental results show that the real-time sound signal noise is processed in time and the efficiency of real-time sound recognition is improved after passing the filtering system.

关 键 词：LABVIEW MATLAB 混合编程 自适应滤波器 LMS算法 DLL文件 

分 类 号：TB115.7[理学—数学] TP311.521[理学—应用数学]