提出了一种细化FFT的短时傅立叶变换(shorttimeFouriertransform,简称STFT)时频分析新方法.STFT实 质为加窗的傅立叶变换,在窗内数据满足平稳性条件下利用傅立叶变换获得频谱,并依据时间间隔移动窗函数最终得到时频表示.细化FFT在分析频率范围内具有较高的频率分辨率,将细化FFT应用于STFT的窗内数据,可有效提高STFT的时频聚集性-Proposed a frequency analysis of short-time Fourier transform FFT refinement (shorttimeFouriertransform, referred to as STFT) A new method. STFT essence of the windowed Fourier transform, the data within the window satisfies the stationary conditions spectrum obtained by Fourier transform, and based time interval finally get moving window function frequency representation. refinement FFT has a higher frequency resolution in the analysis of the frequency range, the refinement of the FFT applied STFT window data, which can effectively improve the STFT time-frequency aggregation