基于多抽样率系统的频谱多分辨率算法研究

Research on Multi-Resolution Spectrum Algorithm Based on Multi-Rate System

快速傅里叶变换作为最常用的变换只能得到单一分辨率的频谱,给实际应用带来很多问题。本文介绍的基于多抽样率系统的变频谱多分辨率算法可以得到变分辨率的频谱,并针对多分辨率算法可能丢失突变信号频率的问题,提出了多分辨率改进算法。从仿真对比研究的结果看出,该方法比传统的信号分析方法更为优越。

Fast Fourier Transform, as the most commonly used transfromation, can only get a single resolution of the spectrum, which brings a lot of problems to the practical application. Spectrum multi-resolution algorithm based on multi-rate system introduced in the paper can get resolution-variable spectrum. In order to avoid losing frequency of abrupt signal, a modified multi-rate algorithm is proposed. Simulation results show that this algorithm is better than traditional signal analysis methods.