基于频率跟踪方式的智能滤波信号处理系统研究

频域模式化分析或时域波形理论等方法在实现与应用上存在一定局限性.介绍了一种较新颖的自适应滤波系统的实现方法,它是利用FFT谱分析抽取的信号主频来实现滤波中心频率实时跟踪及带宽分段变化.实验测试结果表明：该系统具有在较强背景噪声下,跟踪提取有用信号并精确计算信号频率的功能,可为涡街流量计信号处理等工程实际中信号的进一步应用提供研究基础.

Study on the Intelligent Filtering Signal Processing System Based on Frequency Tracing Scheme

There are certain limitations in the analysis of frequency domain mode or the method based on theory of time domain waveform. A new method realizing adaptive filtering system is introduced. In this system, real-time tracing for center frequency of filtering and the sectional variation of bandwidth are implemented by using main frequency of signals extracted by FFT spectrum analysis. The experimental results show that tracing and extracting useful signals and accurately calculating signal frequency can be well performed with this system under high background noise, the system provides research foundation for further engineering applications, such as signal processing of vortex flow meter, etc.