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signal-fourier-analysis
- 信号傅里叶变换的matlab程序，包括对幅频和相频的图形绘制-Signal Fourier transform matlab program, including the magnitude and phase frequency of the graphics rendering
FFT
- 利用FFT估计正弦信号的频率,要估计一个叠加了高斯白噪声的正弦信号 的频率 ，可以通过对x(n)做傅里叶变换，得到频谱图，找出幅度的最大值对应的频率值 ，进行多次变换，求出均方误差 。改变信噪比SNR，通过仿真可以得出随着信噪比增加，均方误差减小。-Sinusoidal signal using FFT frequency estimation, to estimate a Gaussian white noise superimposed on the frequency of sinusoi
1111
- 数字图象处理教程 INTRODUCTION 4 DIGITAL IMAGE DEFINITIONS 5 COMMON VALUES 6 CHARACTERISTICS OF IMAGE OPERATIONS 7 TYPES OF OPERATIONS 7 TYPES OF NEIGHBORHOODS 8 VIDEO PARAMETERS 9 TOOLS 9 CONVOLUTION 10 PROPERTIES OF CONVOLUTION 10 FOUR
MCUAD
- 本音频信号分析仪由32位MCU为主控制器，通过AD转换，对音频信号进行采样，把连续信号离散化，然后通过FFT快速傅氏变换运算，在时域和频域对音频信号各个频率分量以及功率等指标进行分析和处理，然后通过高分辨率的LCD对信号的频谱进行显示。该系统能够精确测量的音频信号频率范围为20Hz-10KHz，其幅度范围为5mVpp-5Vpp，分辨力分为20Hz和100Hz两档。测量功率精确度高达1 ,并且能够准确的测量周期信号的周期，是理想的音频信号分析仪的解决方案。-The audio signal ana
coherencee mvdr
- —The minimum variance distortionless response (MVDR) approach is very popular in array processing. It is also employed in spectral estimation where the Fourier matrix is used in the optimization process. First, we give a general form of the M
fft
- 产生一个正弦衰减曲线，进行快速傅里叶变换，并画出幅值图，相位图，实部图，虚部图-Decay to produce a sine curve, the fast Fourier transform, and draw magnitude diagram, phase diagram, the real figure, the imaginary part of Fig.
power_3phsignaldq
- A Discrete 3-Phase ProgrammableSource block is used to generate a 1 pu, 15 degrees positive sequence voltage. At t = 0.05 s the positive sequence voltage is increased to 1.5 pu. At t = 0.1 s an unbalance is introduced by adding a 0.3 pu negative sequ
An-improved-Hilbert-Huang-method-for-analysis-of-
- The Hilbert–Huang method is presented with modifications, for time-frequency analysis of distorted power quality signals. The empirical mode decomposition (EMD) is enhanced with masking signals based on fast Fourier transform (FFT), for separat
FFToct
- 將一個固定頻寬的傅立葉變換以八度音或1/3八度音的形式表示-This program converts a Fourier transform magnitude with constant bandwidth to an octave or one-third octave format.
thebestfft
- 在vc6.0中成功运行，实行了傅里叶变换。输出傅里叶变换的结果为各个点幅值，傅里叶系数a和b。可以利用来计算电力谐波。-In vc6.0 run successfully implemented a Fourier transform. Output the results of the Fourier transform magnitude of each point, the Fourier coefficients a and b. Can be used to calculate the
lmd
- 直方图提取函数，用于人脸识别中，输入一幅图像，函数内部对输入图像做短时傅里叶变换，得到四幅幅度图，再求四幅图的直方图特征，合并后输出-Histogram extraction functions for face recognition, the input image, the input image inside the function to do short-time Fourier transform, the four magnitude diagram, and then seek
exercise317_1
- Plot the log-magnitude of the Fourier transform of the signal over the interval [0, π], using a 1024-point FFT. The signal should be windowed with a Hamming window of two different durations: 25 ms and 10 ms with the window placed at the signal’s
Lab4-LPC
- For restoration of time-domain signals, an estimate of the instantaneous magnitude spectrum is combined with the phase of the noisy signal, and then transformed via an inverse discrete Fourier transform to the time domain. In terms of comput
melp_bandpass
- In this section, the procedure for Fourier magnitude computations is described examples using real speech signals are included to illustrate the technique. Note that Fourier magnitudes are calculated only when the frame is voiced or jittery voi
coeff
- During encoding, the magnitude of the DFT for the prediction error is found peaks of the magnitude spectrum corresponding to the harmonics associated with the pitch frequency are measured. The peak values are the Fourier magnitudes and are tra
FPR
- The procedure used by the FS MELP coder for Fourier magnitude calculations and quantizations is presented next (Figure 17.3). Inputs to the procedure are the speech data (200 samples), the LPC, and the pitch period. It is assumed that the LPC and
HzAm
- 对图片进行灰度处理、傅里叶变换，并生成所对应的幅值频率图-Gradation processing on the image, the Fourier transform, and generates a frequency corresponding to the magnitude of FIG.
audbri_fft
- fftmag.c Fast Fourier Transform magnitude routine. -fftmag.c Fast Fourier Transform magnitude routine.
fftcode_scope_THD
- fftcode_scope computes and displays spectrum of a signal stored in a Structure with Time format (Format used to save signals in Simulink Scope block and in To Workspace block). The signal must be sampled at fixed step. PSBFFT_SCOPE perf
matlab_phase_retrieval-master
- 傅里叶振幅相位恢复工具箱，包括经典的ER、HIO算法(toolbox of Fourier magnitude phase retrieval in matlab, including ER, HIO algorithms)