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small-target-detection-
- 介绍了经典的时频分布和检测理论的同时，作者利用时频分布的方法，将一 维时间信号转化到二维的时频空间中，通过提取图像的特征来判决信号和杂波， 采用的数据是使用McMaster IPIX雷达，在加拿大东海岸附近测得的。实测数据 研究表明此方法可以得到很好的检测结果。 -In this paper,we first review the time-frequency analysis and time -frequency-based detection methods.
Composite-frequency-design
- 本文介绍了一种复合信号测量系统，该系统基于TMS320F2808实现，用来检测和重建复合频率信号中的主次信号。该系统由计算模块、重建模块和通讯模块组成。为了能在实时运行中自适应地确定采样频率，我们采取了“eCAP+AD”的方法，eCAP模块记录下整形后的复合信号的上升沿过零点时间值并估计出主频率，从而使系统能自动地选取合适的采样频率完成AD采样过程。系统采用了4096点的FFT算法，能够实现高达0.25Hz的频率分辨率，相对分辨率达到0.05 。-This paper introduces a
sonar
- 一种时频域联合捕捉主动声纳信号的方法.介绍了一种可应用于被动声纳的时频域联合捕捉主动声纳信号的方法及其工作流程。仿真相同噪声环境下使用该方法的发现距离与主动声纳探测距离,仿真结果表明使用该方法的发现距离远超过主动声纳探测距离,使用该方法可实现对目标的远程发现。-A time-frequency domain joint capture of active sonar signals. Introduced passive sonar, which can be applied when the
_time_frequency_toolbox
- 时频分析，用于时频分析，压缩文件，概率密度曲线 ，计算样本向量x的概率密度估计，返回在xi点的概率密度f，此时我们使用plot(xi,f)就可以绘制出概率密度曲线。-Time-frequency analysis, time-frequency analysis is used to compressed files
vc.chen
- 分析了傅里叶的不实用性，引出了时频分析的在机动目标的应用。-Fourier analysis is not practical, time-frequency analysis leads to the application of maneuvering target.
MATLAB
- 由于多径效应和移动台运动等影响因素，使得移动信道对传输信号在时间、频率和角度上造成了色散，即时间色散、频率色散、角度色散等等，因此多径信道的特性对通信质量有着重要的影响，而多径信道的包络统计特性则是我们研究的焦点。根据不同无线环境，接收信号包络一般服从几种典型分布，如瑞利分布、莱斯分布等。在此专门针对服从瑞利分布的多径信道进行模拟仿真，进一步加深对多径信道特性的了解。-Due to multipath effects and the mobile station sports and other
mel-frequency!
- Voice Recognition Algorithms using Mel Frequency Cepstral Coefficient (MFCC) and Dynamic Time Warping (DTW) Techniques
diagnosis--based-on-LEM
- A novel fault feature extraction method based on the local mean decomposition technology and multi-scale entropy is proposed in this paper. When fault occurs in roller bearings, the vibration signals picked up would exactly display non-stationary
Recent-timefrequency-analysis
- Nonstationary signal analysis one of the main topics in the field of machinery fault diagnosis.Time-frequency analysis can identify the signal frequency components, reveals their time variant features,and is an effective tool to extract machinery h
Vibration-Monitoring
- The HHT represents a time-dependent series in a two-dimensional (2-D) time-frequency domain by extracting instan eous frequency components within the signal through an Empirical Mode Decomposition (EMD) process. The analytical background of t
mt
- 小波分析理论是一种新兴的信号处理理论，它在时间上和频率上都有很好的局部性，这使得小波分析非常适合于时频分析，借助时频局部分析特性，小波分析理论已经成为信号去噪中的一种重要的工具。利用小波方法去噪，是小波分析应用于实际的重要方面。-The wavelet analysis theory is a new signal processing theory. It has a very good topicality in time and frequency, which makes the wav
variable-frequency-power-source
- 此 次 变 频 电 源 采 用 数 字 方 式 控 制 , 电 源 系 统 设 计 包 括 主 电 路 、 控 制 电 路 和&
A-NEW-METHOD-FOR-GABOR-MULTIPLIER
- This work addresses the analysis of families of sound signals through linear transformations that map signals to each other. These transformations are modeled as Gabor multipliers, which are defined by point wise multiplication with a given transfer
DigitalSignalProcessing(matlab)
- 这是一本通过MATLAB 环境下对数字信号进行处理的英文书籍。内容包括离散时间信号，离散傅里叶变换 时频分析等。是我很喜欢的一本书-This is a book by using MATLAB programming language for digital signal processing in English.and it includes Time-Frequency Analysis
42393210-s7033
- a good docs about an electrobiological signal traitment and processing it describ a wavelette method and the time frequency traitment
dimensionalspectral
- 小波变换是一种线性运算 , 它对信号进行不同尺度的分解 , 可有效地应用于如 信噪分离 , 提高时频两域的分辩率等 。本文讨论小波变换用于心电 Q RS 波形中细微特征 ( 即高频成份特征 ) 提取的方法.-Wavelet transform is a linear operation, its signal is decomposed at different scales, can be effectively used as the signal to noise separat
Blind-source
- Blind beamforming for non gaussian signals-Blind source separation based on time frequency s
S-Transform
- This is matlab code for stockwell transform as a time frequency distribution for feature extraction that was developed by Doctor stockwe-This is matlab code for stockwell transform as a time frequency distribution for feature extraction that was dev
demodulation-of-MFSK-signals
- 提出了一种多迸制频移键控(M娲K)信号调制分类及解调方法，选取截获接收机输出的MFSK信 号的时频脊线作为分类特征，利用无监督聚类算法求取最佳聚类数M．利用时频脊线的Ham：小波变换 估计码元宽度，并且利用对应最佳聚类数的聚类中心确定抽判门限，通过对时频脊线抽样判决，实现了 MFSK信号的解调．理论分析和对实际信号的处理结果证明了此算法的可行性．-new algorithm is proposed for elassillcation and demodulation of MFSK
S-transform-time-frequency
- This code computes the Stockwell transform (S-Transform) of a one dimensional series