Description: 最近和一位研友交流时谈到Matlab时频分析，了解到Matlab并不提供直接的绘制时间-频率分布图的命令，而是以时间-尺度图代之。不过很多时候我们要用到时间-频率图来分析信号，这两天集中搜集了相关的资料，其中在 MathWorks.com 的 Fileexchange 中心找到一个不错的Matlab时频分析工具，使用 Matlab GUI 界面开发，内核用C编写，感觉使用方便，分析和作图速度快，而且有多种图形表达方式选择。-Friends of the recent research and a reference to communicate Matlab time-frequency analysis, that Matlab does not provide a direct rendering of time- frequency distribution of command, but in time- Scalogram instead. But often we spend time- frequency diagram to analyze the signal, these two days focus on relevant information collected, of which the Fileexchange in MathWorks.com Center Matlab to find a good time-frequency analysis tool, the use of Matlab GUI interface development, which the preparation of nuclear use C, I feel easy to use, fast analysis and mapping, and expression has a variety of graphics options. Platform: |
Size: 769024 |
Author:吴巧云 |
Hits:
Description: 印度GURUNANAK ENGINEERING COLLEGE数字信号处理实验室的DSP+c+Matlab联合编程手册-DIGITAL SIGNAL PROCESSING LAB (IV-I SEM)
INDEX
1. Architecture of DSP chips-TMS 320C 6713 DSP Processor
2. Linear convolution
3. Circular convolution
4. FIR Filter (LP/HP) Using Windowing technique
a. Rectangular window
b. Triangular window
c. Kaiser window
5. IIR Filter(LP/HP) on DSP processors
6. N-point FFT algorithm
7. Power Spectral Density of a sinusoidal signals
8. FFT of 1-D signal plot
9. MATLAB program to generate sum of sinusoidal signals
10. MATLAB program to find frequency response of analog Platform: |
Size: 1582080 |
Author:wangjin |
Hits:
Description: matlab实现，验证奈奎斯特采样定理，对信号求傅里叶变换的数值解，数值求解，画出时域图，频域图-matlab implementation, verification Nyquist sampling theorem, Fourier transform of the signal find the numerical solution, numerical solution, draw the graph in time domain, frequency domain graph Platform: |
Size: 1024 |
Author:白叶叶 |
Hits:
Description: 1．找点一段心电信号，画出信号时域波形和频谱图；
2. 利用MATLAB中的随机函数产生噪声加入到心电信号中，使心电信号被污染，读出污染后的号并画出对应信号的时域波形和频谱图；
3．用双线性变换法设计一个Butterworth带通滤波器，输出所设计的滤波器的阶次，分子、分母多项式的系数，画出滤波器的频率响应（幅频响应和相频响应）曲线；（也可以根据自己需要设置滤波器性能指标）
带通通滤波器设计性能指标：fs1=10Hz, fp1=20Hz, fp1=1000Hz, fs2=1200Hz, ap=18dB,as=3dB
4．用滤波器对含噪声的心电信号进行滤波，画出滤波以后信号的时域波形和频谱；
5．比较滤波前后信号变化；
-1. Find a ECG, draw time-domain signal waveform and frequency spectrum
2. Using MATLAB random function in the noise added to the ECG, so that the contaminated ECG signals, read out the contamination of the number and draw the corresponding time domain waveform and frequency spectrum
3. Bilinear transformation method used to design a Butterworth bandpass filter, the output of the order of the filter design, numerator, denominator polynomial coefficients, draw the filter frequency response (amplitude frequency response and phase frequency response) curve (you can also set filters based on their performance needs)
Filter design with all the performance indicators: fs1 = 10Hz, fp1 = 20Hz, fp1 = 1000Hz, fs2 = 1200Hz, ap = 18dB, as = 3dB
4. Filters for ECG signal with noise filtering, after filtering the signal to draw the time-domain waveform and frequency spectrum
5. Compare signal change before and after filtering
Platform: |
Size: 65536 |
Author:王方 |
Hits:
Description: 谱估计中的Esprit算法，利用matlab进行仿真找出信号的频率，精度较高-Spectral estimation algorithm in the Esprit, the simulation using matlab to find the signal frequency, high precision Platform: |
Size: 1024 |
Author: |
Hits:
Description: 完成对一段语音信号的短时分析，语音信号要包括清音、浊音和无声段，求其短时平均能量、短时平均过零率、短时自相关函数和短时功率谱；-Complete short-term analysis of a voice signal, the specific requirements: a voice signal to include the voiceless, voiced, and silent segments 2, find its short-term average energy, short-time average zero crossing rate, short-term autocorrelation function and short-term power spectrum 3, drawing, and the differences in the comparative analysis of three types of audio signals in the four short-term parameters 4, estimated using short-time autocorrelation voiced fundamental frequency using matlab to write and draw Platform: |
Size: 2048 |
Author:houjam |
Hits:
Description: how to scovert speech to matrix
how to convert matrix form to speech
how to find sample frequency for speech
how to play an sound signal in matlab
mf-how to scovert speech to matrix
how to convert matrix form to speech
how to find sample frequency for speech
how to play an sound signal in matlab
mfcc Platform: |
Size: 443392 |
Author:nvdmahesh |
Hits:
Description: 在matlab中利用声卡对语音信号进行实时采集，并采集波形图，对采集信号进行频谱分析，画出频谱图，能查找峰值频率。有详细的注释和参数调整说明-In Matlab using real- time audio of the speech signal acquisition and acquisition waveform, Spectral Analysis of Signals and draw the spectrum, can find the peak frequency.A detailed description of the annotation and parameter adjustment Platform: |
Size: 2048 |
Author:海洋 |
Hits:
Description: 该段代码能实现找出隐藏或淹没在噪声时域信号中信号的频率成分。用FFT对试验数据进行谱分析，指出数据包含的频率成份。-One use FFT is to find hidden or submerged in the time domain signal noise frequency components of the signal. Test data with FFT spectrum analysis, pointed out that the data contained in frequency components. Platform: |
Size: 199680 |
Author:周煊 |
Hits:
Description: 对非平稳信号进行分段、截取，再对处理过后的短时信号做短时傅里叶变换，分析其频谱特性，并找到各个时间节点的频率特性，以便分析不同事件段内的声音特征。(The nonstationary signals are segmented, and then the interception, the short-time signal after processing the short-time Fourier transform, the analysis of the spectrum characteristics and frequency characteristics and find the different time node, in order to analyze the acoustic characteristics of different event period.) Platform: |
Size: 7168 |
Author:帅红
|
Hits:
Description: 对非平稳信号进行分段、截取，再对处理过后的短时信号做短时傅里叶变换，分析其频谱特性，并找到各个时间节点的频率特性，以便分析不同事件段内的声音特征，达到区分不同声音的目的。(The nonstationary signals are segmented, and then the interception, the short-time signal after processing the short-time Fourier transform, the analysis of the spectrum characteristics and frequency characteristics and find the different time node, in order to analyze the acoustic characteristics of different event period, to distinguish different sounds to.) Platform: |
Size: 2048 |
Author:帅红
|
Hits:
Description: 对非平稳信号进行分段、截取，再对处理过后的短时信号做短时傅里叶变换，分析其频谱特性，并找到各个时间节点的频率特性，以便分析不同事件段内的声音特征，一图像的形式表达出，最终达到区分不同声音的目的。(The nonstationary signals are segmented, and then the interception, the short-time signal after processing the short-time Fourier transform, the analysis of the spectrum characteristics and frequency characteristics and find the different time node, in order to analyze the acoustic characteristics of different event period, expressed in the form of an image, and ultimately achieve the purpose of distinguishing different voices.) Platform: |
Size: 8192 |
Author:帅红
|
Hits:
Description: 对非平稳信号进行分段、截取，再对处理过后的短时信号做短时傅里叶变换，分析其频谱特性，并找到各个时间节点的频率特性，以便分析不同事件段内的声音特征，以图像的形式表达出，最终达到区分不同声音的目的。(The nonstationary signals are segmented, and then the interception, the short-time signal after processing the short-time Fourier transform, the analysis of the spectrum characteristics and frequency characteristics and find the different time node, in order to analyze the acoustic characteristics of different event period, in the form of images to express, to reach the purpose of distinguishing different voices.) Platform: |
Size: 1024 |
Author:帅红
|
Hits:
Description: 透過信號處理找出差分方程式跟他們的頻率響應(用DTFT的方式)(Find the difference equation and frequency response of DTFT in Digital Signal Processing) Platform: |
Size: 207872 |
Author:Wuhaha
|
Hits:
Search - find signal frequency in matlab