Fast Fourier Transform Matlab

Finding the Fourier transform of a rectangular pulse..filtering the spectrum and regenerating the signal usingthe filtered spectrum is done...at the end Rayleigh theorem is proved by showing that the energy content of both time domain and frequency domain signals are equal..your comments are...

This m file acquired and processed using chirp Fourier transform spectrum of HR4000 spectrometer

The numerical inversion of the Laplace transform is a long standing problem due its implicit ill-posedness. These functions implement one of the more well known numerical inversion algorithms, the Weeks method. Particularly new here is the use of graphics processing unit [GPU] computing to...


Platforms: Matlab

The Matlab code in this folder implements 1D-3D NUFFTs via fast Gaussian gridding. The convolution loops are written as C programs to be compiled as mex files from the Matlab command prompt. Further mathematical details about the code can be found in L. Greengard and J. Lee, "Accelerating the...


Platforms: Matlab

[cg, psg] = crandn(rgau,m)Generate correlated Gaussian sequences by Fourier synthesis.Input parameters:rgau = correlation function - length n/2m = number of realisationsOutput:cg = m x n matrix containing m sequences of n correlated variates from a zero mean, unit variance normal distributionpsg...


Platforms: Matlab

This function allows one to calculate the Fourier transform of a chirped function evaluated at specific points using the stationary phase approximation.Imagine a pulse with a large time-bandwidth produce: this would require a large amount of data points in order to evaluate the Fourier transform....


Platforms: Matlab

A visualization of the fourier transform applied to sound data. Analyzes a time-domain sound sample using the Fourier Transform, and graphically displays the results and sound in real time. Attempts to audio into sheet music.


Platforms: *nix

GFFT is generic simple and efficient Fast Fourier Transforms (FFT) implementation using policy-driven design and template metaprogramming. This new implementation of Fast Fourier transforms rose during study of the classical Cooley-Tukey algorithm and from an idea to assume the transform length...


Platforms: *nix

Generation of signal with extra parametersDetection using;Fast Fourier Transform AlgorithmGoertzel AlgorithmDigital Filtering (FIR Filter bank)


Platforms: Matlab

the stationary signal f(t)=cos(2*pi*5*t)+ cos(2*pi*10*t)+ cos(2*pi*20*t)+ cos(2*pi*50*t)having frequencies of 5,10, 20and 50 Hz at any given time instant.MATLAB program can be implemented to plot the stationary signal mentioned above:Clear...


Platforms: Matlab

Compute the discrete Fourier transform at specified frequencies, not using fft.Why one may need this?(1) MATLAB fft function computes the amplitude of signals only (no phase).(2) Once having the recorded time-series data, one often uses fft to do the spectral analysis. However, the frequency set...


Platforms: Matlab

FREE DiceLock Security DiceChecker DLL Library. If in your process or software applications you have need for random number streams and you want to check that the input or output random stream is really at random, you can incorporate DiceChecker library in your applications to be sure that the...


Platforms: Windows

FREE DiceLock Security DiceCheck GUI and DLL Library. If in your process or software applications you have need for random number streams and you want to check that the input or output random stream is really at random, you can incorporate DiceChecker library in your applications to be sure...


Platforms: Windows

NumXL is a Microsoft Excel add-in for econometrics and data analysis, designed to make finance modeling and time series easier to manage. You can perform all of your data work right in Excel. NumXL allows you to apply advanced econometric analysis quickly and easily via an intuitive user...


Platforms: Windows, Windows 8, Windows 7, Windows Server

FREE DiceLock Security libDiceChecker-x .so shared Library. If in your process or software applications you have need for random number streams and you want to check that the input or output random stream is really at random, you can incorporate DiceChecker-x library in your applications to be...


Platforms: *nix

NIST benchmark for random stream checking. Includes source and object code. Visual C++ 2008 project paramaters included. Implemets the following tests: Approximate Entropy, Block Frequency, Cumulative Sums, Discrete Fourier Transform, Linear Complexity, Longest Run Of Ones, Rank, Overlapping...


Platforms: Windows

A visualization of the fourier transform applied to sound data. Analyzes a time-domain sound sample using the Fourier Transform, and graphically displays the results and sound in real time. Attempts to audio into sheet music.


Platforms: Windows, Mac, Linux

From GUI can import arbitrary data or audio signal. Next we can plot them both in time and frequency domain. Also we can visualize the short time Fourier transform of that signal.


Platforms: Matlab

These algorithms are an implementation of the iterative amplitude adapted Fourier Transform method of Schreiber and Schmitz to make surrogate time series. These surrogate time series or fields were made to have the Power spectrum and the amplitude distribution (or PDF) from a measurement, but...


Platforms: Matlab

Run this program with a small image of about 100x100 pixels its because though it works on image of any size but for large images the execution time is very high. So if you do not want to wait for a very long time use a small image.


Platforms: Matlab