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短时傅里叶变换的一些简单的演示，其中有矩形窗和高斯窗-some demos for the short time fourier transform
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Produce lfm,tfm,sfm,pfm,bpsk,qpsk cw ledai signal .Use short-time Fourier transform arrive at the instantaneous frequency.-Produce lfm, tfm, sfm, pfm, bpsk, qpsk cw ledai signal. Use short-time Fourier transform arrive at the instantaneous frequency.
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A novel texture-based Automatic Fingerprint Authentication System (AFAS) is proposed. A fingerprint image is preprocessed to enhance the image by Short Time Fourier Transform (STFT) analysis. Then, three sets of invariant moment features, as a kind o
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短时傅里叶变换
将时间上选取一段，开一个小窗口
在该改窗口上进行变换
能得到更详细的频谱信息-Short time Fourier transform, select the time period, to open a small window in the window changes to transform the spectrum to get more detailed information
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指纹图像增强，gabor滤波器，包括形态学分割，形态学细化，加窗短时傅里叶变换增强，方向图估计及平滑，纹线频率估计及平滑-Fingerprint image enhancement, gabor filters, normalization, equalization, morphological segmentation, morphological thinning, windowed short time Fourier transform enhanced estimates and s
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对语音信号的实现短时傅里叶变换 用汉明窗进行信号的截取-The speech signal to achieve short time Fourier transform of the Hamming window used for signal interception
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短时傅里叶变换,主要用于故障诊断和信号处理，很好用-Short-time Fourier transform
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短时傅立叶变换和几种基小波的编制以及对多个基小波的选择。-short time Fourier transform and wave_bases
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通信领域里图像处理的短时傅里叶变换域维格纳分布-Wigner distribution of the short time Fourier transform domain image processing in the communication field
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令x(n)=5exp(j*0.15*n*n)+6exp(j*300n-j*0.15*n*n) ，w(n)为高斯窗函数。试用matlab软件，取不同长度的窗函数，分别求x(n)离散短时傅里叶变换，并进行信号重构。-ORDER x (n) = 5exp (j* 0.15* n* n)+6exp (j* 300n-j* 0.15* n* n), w (n) for the Gaussian window function. Trial Matlab software, take different l
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里面包括短时傅里叶变换谱，倒谱平滑等，这些代码广泛用于，语音说话人识别，语音增强，雷达，声呐，图像等领域-Including short-time Fourier transform spectrum, cepstrum smooth, etc., are widely used in the code, voice speaker recognition, speech enhancement, radar, sonar, image, etc
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分析和仿真演示短时傅里叶变换时间确定性与频率确定性之间的关系-Analysis and simulation demonstrate short time Fourier transform relationship between certainty and uncertainty frequency
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短时傅里叶变换的例子，运行处信号图和三维时频分析图-Examples of short-time Fourier transform, while running at a frequency signal and three-dimensional analysis chart
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时频信号分析，短时傅里叶变换，matlab实现工具包-time-frequency signal analysis—short time fourier transform—tool kit（in matlab）
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小波变换（wavelettransform，WT）是一种新的变换分析方法，它继承和发展了短时傅立叶变换局部化的思想，同时又克服了窗口大小不随频率变化等缺点，能够提供一个随频率改变的“时间-频率”窗口，是进行信号时频分析和处理的理想工具。-Wavelet transform (WT) is a new transform analysis method, which inherits and develops the idea of localized short-time Fourier tra
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短时傅里叶变换，信号处理，轴承故障,时频分析工具-Short-time Fourier transform, signal processing, bearing failure，
Time-frequency analysis tool
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