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updated 1 month ago

Calibrated Spectral Analysis by Edward Zechmann

Simple Fourier Spectral Analysis of sound pressure time record. (spectral analysis, sound, sound pressure)

ACdsgn(Fs)

ArgStruct=parseArgs(args,ArgStruct,varargin)

P=findpeaks(x,y,SlopeThreshold,AmpThreshold,smoothwidth,p...

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updated 2 months ago

DFT & DCT by Suraj Kamya

DFT and DCT without using inbuilt function for 1-D signal (dct, dft, dsp)

Xk=dft(xn)

[Xk] =dctu(xn)

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updated 3 months ago

A finite cosine wavetrain and its Fourier transform by Sathyanarayan Rao

This code computes frequency spectrum of a finite cosine wavetrain using MATLAB FFT function. (fft, axis scaling for fft, cosine wavetrain)

wave_train.m

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updated 6 months ago

Multiecho enhancement for 2D/3D (N-D) images by Luke Xie

Enhances images using a weighted sum or MEFIC. (2d, 3d, grayscale)

img2=multiecho_enhance(img,str,weights)

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updated 11 months ago

Fourier Decomposition Demo by Job

Visualizes how an image can be decomposed (and reconstructed) in 2D sinusoidal waves. (fourier transform, image reconstruction, mri)

FourierImageDecomposition.m

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updated 1 year ago

Continous Fractional Fourier Transform FrFT by Ashish Soni

The FrFT, which is a generalization of the ordinary Fourier transform. (fractional fourier tr..., signal processing, fourier transform)

Untitled4.m

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updated 1 year ago

Get harmoniques of a real signal by Azzi Abdelmalek

Given the signal x(t), the function find a0, ak, bk the amplitudes of cos and sin waves. (fft, fourier transform, harmonics)

[wc,w0,a0,ak,bk,c0,ck]=get_harmonics(y,pas)

get_harmonics_demo.m

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updated 1 year ago

One-Sided FFT by Aravazhi Anbarasu

More intuitive than built in function for simple operations.Useful for repetitive code and plotiing. (data export, data import, communications)

fft_calc(X,fs)

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updated 1 year ago

Short Time Fourier Transform by Hafeez Dhalla

Script for computing the short time Fourier transform of 1D signals. (dsp, stft, fft)

X=stft(x,wl,olr,window,alpha)

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updated almost 2 years ago

P-Stage Wavelet Compression Tool by Brian Moore

Performs P-Stage Wavelet Compression on an input image and compares the fidelity of the i/o images. (wavelets, image compression, signal processing)

PStageWavelets(imageStr,iter,cf,varargin)

WaveletFunctions.m

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updated almost 2 years ago

Biorthogonal Wavelet Compression Tool by Brian Moore

Contains numerous functions to generate biorthogonal wavelets and compress grayscale/color images. (wavelets, biorthogonal wavelets, jpeg)

BWDesignTool(varargin)

BiorthogonalWavelets(imageStr,iter,cf,varargin)

CDFWavelets(l,lt,varargin)

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updated almost 2 years ago

STFT, Short time fourier transform by Suraj Kamya

Short Time Fourier Transform without using inbuilt function. (stft, fourier transform, short time fourier tr...)

X=stfth(x,wl)

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updated almost 2 years ago

STFT, MDCT and inverses. Onset and pitch detection by Antoine Liutkus

Short Time Fourier Transform, MDCT and their inverse. CQT. Onset and Pitch detection. (fourier transform, audio, signal processing)

Signal

misc

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updated 2 years ago

FinancialModelling_Ch2_ImpliedVolatility by Kienitz Wetterau FinModelling

Carr-Madan and Lewis pricing methods using FFT for many advanced financial models (finance, stochastic volatility, heston)

CallPricingFFT(model,S,K,T,r,d,varargin)

CallPricingFFT2(model,S,K,T,r,d,varargin)

CharacteristicFunctionLib(model,u,lnS,T,r,d,varargin)

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updated 2 years ago

Coaxial Cable Based Digital Communication System Simulator by Iftekhar Tanveer

It is a GUI based MATLAB code to simulate a digital communication system. (signal processing, communications, digital signal)

BERCalc(Br,inpt_vol,coding, ...

DigitalTransmissionGUI(varargin)

Sim_EyePat(Br,inpt_vol,coding, ...

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updated 3 years ago

Geometrical interpretation of the 1-D DFT by Michael Chan

Demonstrates Professor Grigoryan's illustration of geometrical interpretation of the 1-D DFT. (dft, geometry, visualization)

do_Operation1.m

do_Operation2.m

executeMain.m

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updated 3 years ago

Back projections and tensor transform by Michael Chan

Illustrates back projections and Professor Grigoryan's tensor transform. (tensor, backprojections, splitting signals)

A=correct_image(A)

B=f_pst(A,p,s);

Err=msr_error(o,out,N1,N2)

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updated almost 4 years ago

Fourier transform demonstration by David Young

An introductory demonstration of the discrete Fourier transform, making use of the fft function. (fourier transform, discrete fourier tran..., fast fourier transfor...)

Introductory Fourier Transform Demonstration

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updated almost 4 years ago

Quick spectral analysis plots by Matthew

Create quick spectral analysis plots. (signal processing, spectral analysis, fourier transform)

spect(data, K, beta, out_form, samp_freq)

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updated 4 years ago

Frequency-Domain Integration by Charles Rino

Fourier-Domain integration of a specified function, e.g. frequency versus time to extract phase. (signal processing, fourier transform, demo)

nicefftnum(n)

phase_meas=FrequencyDomainIntegrator(fDop_meas,tt)

FreqDomainIntTest.m

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updated almost 5 years ago

Surrogate time series and fields by V. Venema

Algorithms to calculate 1D, 2D and 3D fields with your specified power spectrum and distribution. (surrogates, iaaft, iterative)

fourier_coeff_isotrop(x)

iaaft_loop_1d(fourierCoeff, sortedValues, initialisationS...

iaaft_loop_2d(coeff_2d,sorted_values)

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updated almost 6 years ago

Stationary phase approximation for performing Fourier Transforms by Adam Wyatt

Performs a Fourier Transform of a function using the stationary phase approximation (integration, stationary phase appr..., fourier transform)

my_SPA(Aw, phiw, w, t, NP, phiw1, phiw2)

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updated 7 years ago

Nonparametric Power Spectrum Estimation With Thresholded Cepstrum by Steve Lutes

A function to nonparametrically estimate the power spectrum via thresholded cepstrum (spectral analysis, power spectrum, cepstrum)

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updated almost 8 years ago

Airy Function Generator by Dan Burke

Produces and Airy Pattern (application, airy function, generator)

CircSignal(dim,radius,mag,pos)

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updated almost 8 years ago

Waterfall FFT by Tom Irvine

This program calculates the Waterfall FFT of a time history. (spectral analysis, waterfall, fft)

waterfall_FFT.m

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updated 8 years ago

Partial Fast Fourier Transform by Gerbrand van der Zouw

Fast computation of part of an FFT using fractional fourier transform (spectral analysis, fourier transform, fractional fourier tr...)

fpft=fastpartialfouriertransform(x,n,m,shift);

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updated 10 years ago

Fast Convolution by Stephen McGovern

Convolves two extremely large vectors in reasonable time. (dsp, fast, convolution)

[y]=fconv(x, h)

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updated 10 years ago

invspecgram by Alfredo Fernandez

Inverse of MATLABĀ“s specgram. (spectral analysis, invspecgram, specgram)

[data]=invspecgram(B,NFFT,Fs,WINDOW,NOVERLAP);

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updated 11 years ago

MyFFT by . Shawn Mikula

Script for generating pretty visualizations based on the Fast Fourier Transform of simple objects. (gallery, fft, visualization)

g=myfft(f)

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