本文着重分析了电机起动过程的定子电流时变信号的 频谱分析,使用短时傅立叶变换(Short Time Fourier Transform)作为分析手段,在实际测 量中监测起动电流中某一最佳频率电流成分的变化,产生对故障诊断更为有效的信息, 使整个系统的处理更为...
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2-1-3 短时傅里叶变换 短时傅里叶变换(Short Time Fourier Transform,STFT)是一种常用的信号时频分析方法,基本思 想是将信号傅里叶变换的积分区间局部化,即将待分析的时变信号分成...
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早在 1946 年,Gabor就提出了短时傅立叶变换(Short Time Fourier Transform,STFT)的概念,用以测量声音信号的频率定位64。
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discrete short time Fourier transform 离散短时傅里叶变换 ; 再利用离散短时傅里叶变换 ; 离散短时傅氏变换
short-time fourier transform 短时间傅里叶变换
adaptive short-time Fourier transform 自适应STFT
modified short-time fourier transform 改进的加窗傅氏变换
short time Fourier transform spectrogram 短时傅里叶变换谱
time-frequency short time Fourier transform 时频短时傅里叶变换
short time discrete fourier transform 离散短时傅里叶变换
short-time fractional Fourier transform 短时分数阶傅里叶变换
S transform(ST) combines the advantages of short time Fourier transform(STFT) and wavelet transform(WT). It is a powerful means for time-frequency analysis of non-stationary signal.
S变换结合了短时傅里叶变换和小波变换的优点,是非平稳信号时频分析的有力工具。
参考来源 - 基于广义S变换的信号提取与抑噪The main work of this dissertation is summarized as follows:Continuous and discrete wavelet transform is researched according to analysis of the origin of wavelet transform and the shortcoming of Short Time Fourier Transform.
本文的主要工作内容有: 通过分析小波变换的思想来源,短时Fourier变换的缺陷研究了连续小波变换和离散小波变换。
参考来源 - 基于小波变换的嵌入式图像编码方法研究·2,447,543篇论文数据,部分数据来源于NoteExpress
Results of analysing Doppler signals simulated using this method with the short time Fourier transform show agreement with the theoretical prediction.
利用短时傅里叶变换分析以这种方法合成的模拟多普勒信号,实验的结果和理论基本吻合。
Based on Fourier transform, short time Fourier transform and Wavelet transform, a realizing method of system software module of Virtual signal analysis instrument is proposed.
基于傅立叶变换、短时傅立叶变换和小波变换,提出了一种虚拟信号分析仪的系统软件模块的实现方法。
Short time Fourier transform was used to analyze the simulated signal in the time-frequency domain, a micro-Doppler image that can demonstrate the target characteristics was generated.
采用了短时傅里叶变换方法对仿真信号进行了时频分析,得到了能够较好地反映目标特征的微多普勒图像。
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