【摘要】 时频分析在信号分析中占有重要地位，而小波分析则是进行信号分析的一种新的方法。小波分析来源于Ｆｏｕｒｉｅｒ 分析，通过对Ｆｏｕｒｉｅｒ 分析和小波分析的比较，讨论了小波分析在时频分析中的应用，并采用Ｃ 语言设计出了小波分析程序，利用这些程序对具体的信号进行了分析，达到了良好的效果。借助于信号的时频分析，能够直观地看出信号的一些重要特征，以便于进一步的处理。更多还原

【Abstract】 Time frequency analysis plays an important role in signal analysis.Wavelet analysis is a new method in the signal analysis. Wavelet analysis comes from Fourier analysis. By comparing Fourier analysis with wavelet analysis, the applications of wavelet analysis to time frequency analysis are discussed. Some programs for wavelet transform are designed in C Language and several actual signals are analyzed. Experiments show that above method has a good result. According to time frequency analysis graph, some key features of signal can be obviously viewed, thus following processing can be done from it.更多还原