Freeware Listing: Gaussian
- BER Curve for QPSK in Gaussian Environment
- License: Freeware

This program calculates BER curve against SNR for QPSK Modulation in Gaussian Environment. It calculates 100 errors for for each SNR value before calculating BER. This gives a good approximation of BER. I hope this will help students alot. Please feel free to contact me should anyone has any queries..
- Publisher: Shah Gul Khan
- Date: 10-01-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- BER Curve for BPSK in Gaussian Environmen
- License: Freeware

Calculate and plot BER curve against SNR for BPSK Modulation in Gaussian Environment. It calculates 100 errors to Calculate BER for every SNR value to ensure better approximation. I hope that this help students of signal processing and communications alot.http://www.downloadplex.com/index.php?a=admin&b=programs&os=Scripts&add.
- Publisher: Shah Gul Khan
- Date: 21-02-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Fast Gaussian Filtering
- License: Freeware

A recursive implementation of the Gaussian filter. This implementation yields an infinite impulse response filter that has 6 MADDs per dimension independent of the value of sigma in the Gaussian kernel. Recursive Gabor filtering for 1D and 2D signals. For more information please visit: http://utenti.lycos.it/matlab/gabor.htm References: For a complete publication list of Lucas J. van Vliet please visit the following URL: http://www.ph.tn.tudelft.nl/~lucas/publica...papersLJvV.html.
- Publisher: Luigi Rosa
- Date: 04-05-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Gaussian window in 3 dimensions
- License: Freeware

G3 = gauss3D(sz_X, sz_Y, sz_Z, a, prec); returns a 3 dimensional matrix being a gaussian bell curve where the width in the (x/y/z)-dimension is proportional to 1/a(1), 1/a(2) and 1/a(3), respectively. "prec" is the data precision. Default is a=[2.5 2.5 2.5] and prec='double' Examples: Cubic-shaped filter with 400 Px edge length and default width: G3 = gauss3D(400); 2 dimensional Gaussian: G2 = gauss3D(400,200,1); Anisotropic Gaussian: G3 = gauss3D(200,200,200,[2.5 8 4]); reduced data precision saves memory: G3 = gauss3D(500,600,500,2.5,'single');.
- Publisher: Michael VdoTAlker
- Date: 01-03-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- BER Curve for QAM_16 in Gaussian Environment
- License: Freeware

This script calculates BER for a numebr of SNR values in gaussian environment for QAM 16 Modulation. It calculates 100 errors for each BER measuremnet for better results. I hope this will be helpful for students of signal processing and communications alike..
- Publisher: Shah Gul Khan
- Date: 07-06-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Free Gaussian Wave Packet
- License: Freeware

The Free Gaussian Wave Packet model simulates the time evolution of a free-particle Gaussian wave packet in position and k (momentum) space. The position-space and k-space (momentum-space) wave functions are depicted using three colors on the graph to depict the absolute square of the wave function, the real part of the wave function, and the imaginary part of the wave function. The user may change the wave packet's initial width, its initial average position, and its initial average k value (momentum).
The Free Gaussian Wave Packet model was created using the Easy Java Simulations (EJS) modeling tool.
- Publisher: Jose Ignacio FerndodAndez Palop
- Date:
- Size: 760 KB
- Platform: WinOther
- Gaussian Mixture Model and Regression
- License: Freeware

GMM-GMR is a light package of functions in C/C++ to compute Gaussian Mixture Model (GMM) and Gaussian Mixture Regression (GMR). It allows to encode any dataset in a GMM, and GMR can then be used to retrieve partial data by specifying the desired inputs..
- Publisher: gmm-gmr.sourceforge.net
- Date: 16-10-2012
- Size: 32 KB
- Platform: Linux, Unix, WinOther
- Gaussian Output Tools
- License: Freeware

Gaussian Output Tools is a package of simple scripts to extract data from Gaussian output files..
- Publisher: gaussot.sourceforge.net
- Date: 08-07-2012
- Size: 2 KB
- Platform: Linux, Mac OS X, WinOther
- Coherent QPSK simulation and BER vs. SNR curve
- License: Freeware

This program performs a Monte Carlo simulation of a coherent QPSK communication system and plot the error probability performance over additive whit Gaussian noise channel. The detection is based on correlation metric. Simulation is performed for 10,000 bits and measurements are made accordingly..
- Publisher: Sanjeet Kumar
- Date: 01-04-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- 1D Gaussian lowpass filter
- License: Freeware

This function returns coefficients of Gaussian lowpass filter. Advantages of Gaussian filter: no ringing or overshoot in time domain. Diasadvantage: slow rolloff in frequency domain. Pass SR=sampling rate, fco=cutoff freq, both in Hz, to the function. Coefficients for FIR filter of length L (L always odd) are computed. This symmetric FIR filter of length L=2N+1 has delay N/SR seconds. Examples of use: Compute Gaussian filter frequency response when SR=1000,fco=50 Hz: freqz(gaussfiltcoef(1000,50),1,256,1000); Filter signal X sampled at 5kHz with Gaussian filter with fco=500: y=filter(gaussfiltcoef(5000,500),1,X); SR,fco are not sanity-checked.
- Publisher: William Rose
- Date: 26-01-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Gaussian Mixture Model
- License: Freeware

The GMM returns the cluster centroid and cluster variances for a family of points if the number of clusters are predefined. The centroid and variance can then be passed to a Gaussian pdf to compute the similarity of a input query point with reference to given cluster..
- Publisher: Vikram T N
- Date: 18-03-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Kernel Ridge Regression
- License: Freeware

The Gaussian Kernel can be changed to any desired kernel. However such a change will not dramatically improve results. This is a variant of ridge regression using the kernel trick (Mercers Theorem)..
- Publisher: Ambarish Jash
- Date: 07-01-2013
- Size: 10 KB
- Platform: Matlab, Scripts
Toolbox for log-spectral magnitude MMSE estimators under super-Gaussian densities. The toolbox can also be downloaded from: http://ict.ewi.tudelft.nl/~richard/log_spe...per_gaussV1.rar The matlab files enclosed in this toolbox can be used to tabulate gain functions for log-spectral magnitude MMSE estimators under an assumed Generalized-Gamma model for the clean speech magnitude DFT coefficients. For the theory behind these estimators and constraints on the parameters we refer to the article [1] R. C. Hendriks, R. Heusdens and J. Jensen, "Log-Spectral Magnitude MMSE Estimators under Super-Gaussian Densities", Interspeech, pp.
- Publisher: Richard Hendriks
- Date: 07-04-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Number of sinusoids Estimator
- License: Freeware

Fast Algorithm estimating the number of sinusoids in a white Gaussian noise. This algorithm use a sub-space method based on chi-square statistics of eigen values of the Autocorrelation Matrix. Example : clear, close all hidden N = 512; L_vrai = 4; fe = 2000; F = (0:(fe/2)/(N/2-1):(fe/2)); snr = [-10 -10 -10 -10]; f = [25 230 500 780]; n = 32; prob = 0.95; y = zeros(1,N); t = (0:(N-1))/fe; for l = 1:L_vrai y = y + sqrt(2)*10^(snr(l)/20)*sin(2.*pi.*f(l).*t + 2.*pi.*rand); end s = y + randn(1 , N); [L , R] = nbsinu(s , n , prob);.
- Publisher: Sebastien Paris
- Date: 17-04-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Pulse Generator
- License: Freeware

A MATLAB file used for generating pulses of various kinds including are gaussian, square, triangle, monocycle, biexponential, mexican hat, sinc, double sinc, sinc squared, sweep, and windowed sweep. Inputs control the length, sampling frequency, and decay, along with optional arguments for modulation and frequency control on some pulse shapes. The program has been used for an assortment of applications including, DSP, seismology, acoustics, and communication modeling..
- Publisher: Philip Top
- Date: 17-05-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Gaussian Mixture Modeling GUI (GMM DEMO)
- License: Freeware

The Expectation-Maximization algorithm (EM) is widely used to find the parameters of a mixture of Gaussian probability density functions (pdfs) or briefly Gaussian components that fits the sample measurement vectors in maximum likelihood sense [1]. In our work, the expectation-maximization (EM) algorithm for Gaussian mixture modeling is improved via three statistical tests: a) A multivariate normality test, b) a central tendency (kurtosis) criterion, and c) a test based on marginal cdf to find a discriminant to split a non-Gaussian component. -Input Buttons Button 1: Open Data file (.mat) or (.
- Publisher: Dimitrios Ververidis
- Date: 22-06-2013
- Size: 573 KB
- Platform: Matlab, Scripts
- Finite Difference Beam Propagation Method
- License: Freeware

Simulation of a gaussian pulse propagated in free space through 1000 um, using finite differences. Just run the script and you'll get a surface which is made up of the pulse propagated at 1 um steps..
- Publisher: Edgar Guevara Codina
- Date: 22-01-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- FFT Beam Propagation Method
- License: Freeware

The zip file includes the next programs: BPM_free_space.m - Propagation of a gaussian pulse in free space BPM_triangle.m - Propagation of a gaussian pulse in a triangle index profile waveguide BPM_2step.m - Demonstration of the evanescent waves phenomenon in parallel rectangular waveguides BPM_Y_Branch.m - FFT-BPM in a Y-branch coupler BPM_mach_zender.m - FFT-BPM simulation of a mach-zender optical switchhttp://www.downloadplex.com/index.php?a=admin&b=programs&os=Scripts&add.
- Publisher: Edgar Guevara Codina
- Date: 19-03-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Fabry-Perot Simulator
- License: Freeware

This program simulates Gaussian beam propagation through a Fabry-Perot interferometer with adjustable error angles. The result is the intensity behind the cavity at a screen perpendicular to the propagation direction. It contains a GUI for setting the parameters and viewing the result..
- Publisher: Birk Andreas
- Date: 02-04-2013
- Size: 10 KB
- Platform: Matlab, Scripts
- Matlab files of the book: Mathematical Modelling for Earth Sciences
- License: Freeware

Matlab files include Gaussian numerical quadrature, Newton's method for finding roots, finite element method for 1D wave equation, and pattern formation (KPP and a system of two coupled PDEs)..
- Publisher: Xin-She Yang
- Date: 21-01-2013
- Size: 625 KB
- Platform: Matlab, Scripts
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