Description: 短时傅利叶转换或短时傅利叶变换(英文：short-time Fourier transform, STFT，又称short-term Fourier transform)是和傅利叶转换相关的一种数学转换关系，用以决定时变讯号其局部段落之弦波成份的频率与相位。
-Short-time Fourier transform or short-term Fourier transform (in English: short-time Fourier transform, STFT, also known as short-term Fourier transform) and the Fourier transform is a mathematical transformation between relevant to the decision changed its local paragraphs of the sinusoidal signal frequency and phase components. Platform: |
Size: 4902912 |
Author:王帅 |
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Description: 时间序列的时频特性分析研究时间序列的傅里叶变换及逆变换，快速梅林变换及逆变换，短时离散傅里叶变换，得到瞬时频率。
研究时间序列的Born–Jondan时频分布图，Butterworth时频分布图，Choi–Williams时频分布图，得到瞬时频率。
-Time series analysis of time-frequency characteristics of time series of Fourier transform and inverse transform, the fast Mellin transform and inverse transform, short time discrete Fourier transformation, the instantaneous frequency. Of time series of Born-Jondan time-frequency distribution, Butterworth frequency distribution, Choi-Williams time-frequency map, get instantaneous frequency. Platform: |
Size: 15360 |
Author:李倩 |
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Description: 短时傅里叶的变换，在时域中表示，画出其等高图，三维图-Short-time Fourier transformation, said in the time domain, draw the contour map, three dimensional figure, and so on Platform: |
Size: 1024 |
Author:wenxiaoli |
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Description: STFT和ST变换的基本函数，和一个stft的一个例程-This code computes the Stockwell transform (S-Transform) of a one dimensional series without for loop, thereby making it computationally fast and simple. S-Transform was proposed in 1996. A nice tutorial on S-Transform can be found here:
djj.ee.ntu.edu.tw/S_Transform.pdf?
File Information Description
The present code is a Matlab function that provides a Short-Time Fourier Transformation (STFT) of a given signal x(n). The algorithm is similar to that of Matlab command “spectrogram”. The result is:
1) stft- a matrix with complex stft coefficients with time across columns and frequency across rows
2) f- frequency vector
3) t- time vector.
swt Discrete stationary wavelet transform 1-D.
swt performs a multilevel 1-D stationary wavelet decomposition
using either a specific orthogonal wavelet ( wname see
WFILTERS for more information) or specific orthogonal wavelet
decomposition filters. Platform: |
Size: 4096 |
Author:zl |
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Search - short time fourier transformation