# Fast fourier transformation in c

The following C project contains the C source code and C examples used for fast fourier transformation. This program will sample sound from your
Audiodevice and apply a Fouriertransformation
to the sample buffer.

The following Matlab project contains the source code and Matlab examples used for discrete fourier transform .
This Matlab code can be used for Fourier transforming of any arbitrary discrete data.

The following Matlab project contains the source code and Matlab examples used for to compute dft of a given signal .
Tracing code is intended to perform N point Discrete Fourier Transform of input signal x. Maximum value of N is equal to signal length. It also computes the DFT matrix of order N.

The following Matlab project contains the source code and Matlab examples used for fourier motzkin elimination.
The Fourier-Motzkin Elmination is applied to a system of inequalities according the book "Theory of linear and integer programming" by A. Schrijver (1986). It also contains a reduction of redundant inequalities.

The following Matlab project contains the source code and Matlab examples used for singular fourier pade approximation.
Partial sums of Fourier terms for a function with jumps in value or derivative converge poorly, because of the Gibbs phenomenon.

The following Matlab project contains the source code and Matlab examples used for elliptical fourier shape descriptors.
These two functions impliment the system of elliptical Fourier shape descriptors first described by Kuhl and Giardina in "Elliptic Fourier features of a closed contour" Computer Graphics and Image Processing 18:236-258 1982.

The following Matlab project contains the source code and Matlab examples used for stationary phase approximation for performing fourier transforms.
This function allows one to calculate the Fourier transform of a chirped function evaluated at specific points using the stationary phase approximation.

The following Matlab project contains the source code and Matlab examples used for windowed fourier transform for fringe pattern analysis.
wft2f.m is for windowed Fourier transform. Please use "help wft2f" for details.
unwrapping_qg_trim.m is for quality guided phase unwrapping. Please use "help unwrapping_qg_trim" for details.

The following Matlab project contains the source code and Matlab examples used for windowed fourier transform for fringe pattern analysis (with gui).
Please read readme.docx for details.

The following Matlab project contains the source code and Matlab examples used for 1d fourier shift.
This code uses the Fourier shift theorem to cyclically shift 1D signals by an arbitrary amount.

The following Matlab project contains the source code and Matlab examples used for fourier descriptor.
shape description using FD fourier coeeficeients used for shape classification.

The following Matlab project contains the source code and Matlab examples used for n dimensional fourier interpolation.
Performs N-D FFT interpolation on any data for which fftn works. Will upsample by zero-filling, downsample by truncating high frequencies, or combine both up- and downsampling by dimension to allow arbitrary reshaping.

The following Matlab project contains the source code and Matlab examples used for demonstration of fourier transformation.
These are two M-files “fourier1” and “fourier2” The first is designed to demonstrate how triangular, rectangular, saw tooth, half wave and full wave rectified signals can be built from superposition of a predefined no of Fourier harmonic terms.

The following Matlab project contains the source code and Matlab examples used for displays a two dimensional discrete fourier transformation..
Easy to use display function for analyzing the FFT of tow-dimensional signals.

The following Matlab project contains the source code and Matlab examples used for saliency map based on phase quaternion fourier transform.
Generate Saliency Map based on phase variation of Quaternion Fourier Transform

The following Matlab project contains the source code and Matlab examples used for elliptic fourier for shape analysis.
1) plot_chain_code(ai, color, line_width)
This function will plot the given chain code.

The following Matlab project contains the source code and Matlab examples used for for signal processing fractional fourier transform matlab source code. members wish to be useful .
Fractional Fourier transform, chirp signal decomposition-type realization of fractional Fourier transform

The following Matlab project contains the source code and Matlab examples used for fourier transform application. .
This based Fourier transform GUI application demonstrate ways to generate Fourier transform to an input signal and modify some specifications to make program more flexible to more signals.

The following Matlab project contains the source code and Matlab examples used for stationnary/propagative components decomposition of a longitude/time signal with fourier harmonics .
Split the signal S(SPACE,TIME) into its downward/upward space
propagating and stationnary components via a 2D Fourier decomposition.

The short-time Fourier transform (STFT), or alternatively short-term Fourier transform, is a Fourier-related transform used to determine the sinusoidal frequency and phase content of local sections of a signal as it changes over time.

The following matlab project contains the source code and matlab examples used for stft.

The following Matlab project contains the source code and Matlab examples used for inverse short time fourier transformation (istft) with matlab implementation.
The present code is a Matlab function that provides an Inverse Short-Time Fourier Transformation (ISTFT) of a given spectrogram stft(f, t) with time across columns and frequency across rows.

The following Matlab project contains the source code and Matlab examples used for speech spectrogram.
Takes a vector containing audio data samples as an input, computes short-time Fourier transform (STFT) and plots the STFT power spectrum trajectories across time.

The following Matlab project contains the source code and Matlab examples used for short time fourier transform.
This function enables computation of the short time Fourier transform (STFT) of signals.

The following Matlab project contains the source code and Matlab examples used for short time fourier transform.
STFT gives the time information along with frequency information of the signal.

The following Matlab project contains the source code and Matlab examples used for short time fourier transformation (stft) with matlab implementation.
The present code is a Matlab function that provides a Short-Time Fourier Transformation (STFT) of a given signal x(n).

The following Matlab project contains the source code and Matlab examples used for stft, short time fourier transform.
To compute STFT three windows are available in this code Rectangular, Hamming and Hanning.

The following matlab project contains the source code and matlab examples used for fast fourier transform.

The following Matlab project contains the source code and Matlab examples used for low sidelobe taper design for uniform linear arrays using the iterative fourier technique.
SIDELOBESYNTHESIS computes for a linear array antenna with uniform element spacing an amplitude taper that matches the user defined sidelobe level (SLL) requirement.

The following Matlab project contains the source code and Matlab examples used for mri partial fourier reconstruction with pocs.
POCS (Projection Onto Convex Sets) is often used to reconstruct partial Fourier MRI data.

The following Matlab project contains the source code and Matlab examples used for short time fourier transform (stft).
%% function [t,frequency,Power_spectrum]=fft_s(y,windowlength)
%% Inputs :
% y: input raw signal
% windowlength: window length to take fast fourier transform, it is a
% factor of smapling frequency for example one can enter a window length
% half of the sampling frequency by enteríng 0.

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