时频分析

GIS局部放电信号的联合时频分析

Joint Time-Frequency Analysis on PD Pulse Signal of GIS

基于matlab的信号时频分析仿真

Application and Study of Matlab on Time-frequency Analysis of Signal

Gabor小波时频分析在声发射信号处理中的应用

Application of gabor wavelet time-frequency analysis in signal processing of acoustic emission

用最大重叠离散小波包变换的Hilbert谱时频分析

Time-Frequency Analysis of Hilbert Spectrum Based on Maximal Overlap Discrete Wavelet Packet Transform

作为经典的时频分析工具Fourier变换建立了信号从时域到频域的桥梁。

As the classic of Fourier transform time-frequency analysis tools , it establishes signal from the time to frequency domain .

基于时频分析及SOPC技术的高速跳频侦察、干扰机设计

On the Realization of High-Speed HF Scout Jammer Based Time-Frequency Analysis and SOPC Technology

基于经验模态分解（Empiricalmodedecomposition，EMD）的时频分析方法，被认为是近年来对以傅里叶变换为基础的线性和稳态谱分析的一个重大突破。

Compared to the Fourier-based linear and stationary spectral analysis , the empirical mode decomposition ( EMD ) based time-frequency analysis method was considered a great breakthrough .

基于时频分析的频率步进ISAR成像

Time Frequency Analysis-Based Stepped frequency ISAR Imaging

把HHT时频分析方法引入了转子裂纹故障诊断领域。

The HHT-based time-frequency analysis means was introduced to the field of rotor crack fault diagnosis .

短时傅里叶变换（short-timeFouriertransform，STFT）是一种常见的时频分析工具，窗函数的选择是其分析的前提。

Short-time Fourier transform is a useful tool in time-frequency analysis , and the choice of window function is the precondition for their analysis .

讨论了基于时频分析、AVO分析和层序地层学的地震数据处理解释方法。

Seismic data processing and interpretation methods based on time-frequency . AVO analysis and sequence stratigraphy were also discussed .

首先引入了一种基于布莱克曼窗的短时傅立叶变换，然后给出两种典型的UWB信号，利用这种时频分析方法对两种UWB信号进行了时频分析。

This paper introduces a short time Fourier Transform ( STFT ) windowed by BlackMan window firstly . Then two classic UWB signals are introduced .

对合成波形进行了基于Wigner－Ville分布的时频分析。

The time-frequency analysis based on Wigner-Ville distribution is used to synthetic waveforms .

Costas跳频序列的时频分析技术

Time-frequency analysis technology of Costas frequency hopping array

简述了短时傅氏分析、Wigner分布及小波分析等时频分析方法和特点；

The time frequency analysis methods , such as STFT , Wigner distribution and wavelet transform are studied .

但是常用的时频分析方法如窗口傅里叶变换（WindowedFouriertransform）、WVD（Wigner-VilleDistribution）、小波变换等都有各自的局限性。

However , the time-frequency analysis methods such as windowed Fourier transform ( WFT ), Wigner-Ville distribution ( WVD ) and wavelet transform have their own limitations .

Hilbert-Huang变换是最新发展起来的处理非线性非平稳信号的时频分析方法。

Hilbert-Huang transform ( HHT ) is a new two-step time-frequency analytic method to analyze the nonlinear and non-stationary signal .

利用Gabor小波变换方法对断铅声发射信号进行时频分析，通过确定某一频率下某一模态导波到达传感器的时间，较好地实现了声发射源定位。

By use of Gabor wavelet transform and MAE technologies , the arrived time to sensors of transient AE signals of specific guided mode can be precisely obtained .

将该方法与小波重分配谱、Hilbert-Huang变换两种时频分析方法结合，应用于碰摩故障加速度信号的特征提取，取得了较好的效果。

Combining with wavelet redistribution spectrum and Hilbert-Huang transform , this filtering algorithm achieves favorable result in rotor rubbing feature extraction from acceleration signal .

阐述了一种新的时频分析方法&基于Hilbert-Huang变换的Hilbert时频谱分析，并将其应用到纱线信号分析中。

This article expounds a novel time-frequency analysis method , i. e. , the Hilbert time-frequency analysis based on Hilbert-Huang transform , and its application to yarn signals .

分析了短时傅立叶变换（STFT）、维格纳瑞利分布（WVD）及小波变换（WT）等时频分析方法各自的特点。

The characters of short time Fourier transform ( STFT ), Wigner Ville distribution ( WVD ) and wavelet transform ( WT ) are analyzed .

EMD方法是对非平稳、非线性信号进行分析的一种新的时频分析方法。它比小波分析等方法具有更强的特性并能准确地处理非常短的数据序列。

EMD method is a new method for analyzing nonlinear and non-stationary data , which has more advantage than wavelet analysis , and it can process short time series precisely .

分数Fourier变换作为一种新的时频分析方法，是对经典Fourier变换的推广。它既与经典的Fourier变换有着天然的联系，又提供了Fourier变换所不具备的某些特点。

Fractional Fourier transform as a new time-frequency analysis method , is the generalization of classical Fourier transform , has a close relation with the time-frequency analysis and also provides a certain characteristics which Fourier transform do not have .

对Wigner-Ville变换、短时傅里叶变换（STFT）和小波变换等时频分析方法进行了研究。

Three time-frequency analysis methods , including the Wigner-Ville transform , short time Fourier transform ( STFT ) and wavelet transform , are introduced .

EH4高频大地电磁测深数据的时频分析

Time-Frequency Analysis on The High Frequency Magnetotelluric Sounding Data

小波分析法是一种新的时频分析方法，论文选用了DB小波母函数，在MATLAB环境下对回波信号进行小波去噪分析，消除部分高频噪声。

The DB wavelet generating function is selected to de-noise the echo signals using MATLAB and eliminates some high - frequency noise . The echo signals after de-noising is analyzed in wavelet analysis toolbox by the multi-resolution analysis method .

从时频分析的角度，论文提出了基于改进的自适应高斯基表示（AGR）的ISAR图像理解和处理方法。

Using the joint time-frequency ( JTF ) analysis , a method of understanding and processing ISAR image based on adaptive Gauss Representation is presented .

平滑伪Wigner-Ville（SPWVD）分布是一种优良的时频分析方法，能够在时域频域上对平稳谐波信号及非平稳信号进行联合时频分析。

Smoothed Pseudo Wigner-Ville distribution is an excellent algorithm to analyze the non-steady signal by joint time-frequency analyzing .

介绍了将短时傅立叶变换（STFT）和连续小波变换（CWT）用于先天性心脏病（房间隔缺损、室间隔缺损、动静导管未闭）心音信号进行时频分析、特征提取的研究。

Short-time Fourier Transform ( STFT ) and Continuous Wavelet Transform ( CWT ) were used in the time-frequency analyses of heart sounds of congenital heart disease .

接着分别利用了短时傅立叶变换（STFT）和威格纳&威利分布（WVD）两种时频分析方法实现了仿真。

Respectively , two time-frequency analysis methods , the short-time Fourier transform ( STFT ) and the Wigner-Ville distribution ( WVD ) are used in the simulation .