搜索资源列表
DFT进行频谱分析时的三种现象
- DFT进行频谱分析时的三种现象 1、混叠：对连续信号采样，要求连续信号是带限的，采样频率要足够高。Fs应满足Nyquist采样定理才不产生混叠。 采样前加低通滤波器防混叠 2、频谱泄漏：DFT对时域信号进行了截断（相当于采样信号乘了一个窗函数），时域的乘积相当于频域卷积，改变了原信号频谱。 改用其他窗函数（非矩形）改善泄漏。 3、栅栏现象：DFT 只给出了频谱在采样点上的取值，采样点间的频谱内容丢失。-DFT spectrum analysis of a
chengxuzjf
- 实现矩阵的Cholesky分解,用Cholesky分解求ARMA模型的参数并作谱估计,利用分裂基算法求复序列 的DFT.将得到的 解卷绕，得到无跳变的相频特性.计算七类窗函数并给出归一化对数幅频曲线-achieve Matrix Cholesky decomposition, Cholesky decomposition used for ARMA model and the parameters for spectral estimation, the use of split-based a
AddWindowDFT
- 加窗离散傅立叶变换，用DFT对离散信号进行谱分析，通过选用不同的加窗函数来抑制信号截断造成的频谱泄漏-windowed discrete Fourier transform, DFT right discrete signal spectral analysis, the increase in the alternative window function to curb the disconnect signal leakage spectrum
FIR
- 数字信号处理基于matlab 文件内容 /conv(卷积部分) dupconv 重叠保留法 freqcirconv 频域圆周卷积 freqconv 频域卷积 timecirconv 时域圆周卷积 timeconv 时域卷积 /fft(频域分析部分) d2fft 基2FFT dft DFT最简化程序 dtft DTFT演示 /fir(fir滤波器设计) fir 得到fir滤波器hn getwindow 得到fir
window.m
- This scr ipt calculate the Fourier transform of a Rectangular window of 64 points using an aproximation with a DFT of 1024 points,as well as calculates for differents values of f0 and f1 the module of the frecuency response of the windowed signal.
source-codes
- cohere(x,y,M) computes the coherence function using successive DFTs of length with a Hanning window and 50 overlap. (The window and overlap can be controlled via additional optional arguments.) We see a coherence peak at frequency cycles/sample, as e
blackman_harris
- blackman_harris窗函数用于加窗的DFT-blackman_harris window function for windowed DFT
DCTDFT
- 代码完成二维DCT和DFT对图形的变换和重构，子窗口为8*8-The code can make two dimensional DCT and DFT graphics transformation and reconstruction, the sub window is 8*8.
Dsiggnal_proci
- 数字信号处理一种基于matlab 文件内容/conv(卷积部分)dupconv重叠保留法freqcirconv频域圆周卷积freqconv频域卷积timecirconv时域圆周卷积timeconv时域域卷积积/fft(频域分析部分)d2fft基2FFTdft DFT最简化程序源码dtftDTFT演示/fir(fir滤波器设计)fir 的到fir滤波器hngetwindow 的到fir滤波器窗函数wn -Digital signal processing matlab file content
DFT-mit-hanning-hamming-bartlett-faltung
- DFT hanning hamming bartlett window and convolutin
DFT_spectral_analysis-
- DFT谱分析，加矩形窗与加hamming窗对比-DFT spectrum analysis, plus rectangular window hamming window contrast
Window
- 加窗处理的信号分析，矩形窗与hamming窗的比较。DTFT，DFT等-The windowing processing of signal analysis
dsp.js-master
- dsp.js是一个综合性的数字信号处理的Javascr ipt库。 它包括许多信号分析和生成功能，包括 （正弦振荡器，看到，广场，三角形），窗函数（翰，海明，等）， 信封（ADSR），IIR滤波器（低通，高通，带通，切口），FFT，DFT 变换，延时，混响。-dsp.js is an integrated digital signal processing Javascr ipt libraries. It includes many signal ana
spectrum
- 信号处理中的振幅谱和相位谱以及谱密度估计等-1) Calculation of: - One-sided amplitude spectrum - One-sided phase spectrum - Vector of frequencies. 2) The function can plot: - One-sided amplitude spectrum - One-sided phase spectrum. Two examples are g
window
- matlab hann hamming window FFT D TFT-matlab hann hamming window FFT DFT DTFT
biological_signals
- L=256矩形窗截断离散虚指数信号的DTFT/DFT/FFT的幅度谱-L = 256 rectangular window blocking discrete virtual index signal DTFT/DFT/FFT spectrum
signal_procesing
- 数字信号处理基于matlab 文件内容 /conv(卷积部分) dupconv 重叠保留法 freqcirconv 频域圆周卷积 freqconv 频域卷积 timecirconv 时域圆周卷积 timeconv 时域卷积 /fft(频域分析部分) d2fft 基2FFT dft DFT最简化程序 dtft DTFT演示 /fir(fir滤波器设计) fir 得到fir滤波器hn getwindow 得到fir滤波器窗函数wn idealfilter 理想滤波器(低通,高通,带通)hdn
DFT
- 对实域信号加窗（矩形窗、汉明窗）做DFT分析信号频谱-The real field signal plus (rectangle window, hamming window) do DFT spectrum analysis
Sliding-DFT---CodeWarrior-implementation
- The sliding DFT is a spectral analysis method based on the classical FFT, implemented over a subset of the N center frequencies of the N-point DFT. The sliding DFT (SDFT) algorithm performs an N-point DFT on time samples within a sliding-window.
addwind
- 适合初学者的傅里叶变换实现加窗函数。包括各种函数的类型及算法-ADD WINDOW DFT