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Listing of Communication in Scripts

Simulink model of a dual-tone multi-frequency (DTMF) generator and receiver. Includes bandpass filter bank receiver, real-time soundcard audio, spectrogram of channel and uses Stateflow block to store decoded digits. NOTE: A version of this model which works with the current release of MATLAB and Simulink is shipped with the Signal Processing Blockset.

  • Platform: Matlab, Scripts

A program that allows you to detect DTMF tones, generated for example pressing any key of your mobile, as it happens on automated phone service lines. You can record a tone using your microphone (one tone a time); the software will analyze it and detect it.

  • Publisher: Anna DB
  • Date: 12-04-2013
  • Size: 276 KB
  • Platform: Matlab, Scripts

Use this to encode bit sequences with the duobinary signaling technique or the modified duobinary signaling technique. Duobinary signaling is a three level signaling scheme that uses intersymbol interference in a controlled way instead of trying to eliminate it.

  • Publisher: N Bouman
  • Date: 26-02-2013
  • Size: 10 KB
  • Platform: Matlab, Scripts

If you pass in 2 vectors it returns the unnormalized distance between the vectors, the accumulated distance between them, the length of the warping path (the normalizing factor), and the warping path points. To compare 2 vectors A and B call: [Dist,D,k,w]=dtw(A,B) Dist is the unnormalized distance D is the accumulated distance k is the length of the warping path (the normalizing factor) w is a matrix containing the points along the warping path.

  • Platform: Matlab, Scripts

The zipped file contains 18 m files implementing all experiments in the course EC1302 DSP Lab under Anna University Chennai, India syllabus: butterworth lowpass filter design using bilinear transformation & impulse invariant methods given relative or absolute specifications, DIT-FFT & DIF-FFT algorithms, FIR filter design using window method, sectioned or fast convolution methods (overlap-add & -save), forming a square matrix by circular-shifting of a vector (used in matrix method of convolution).

  • Platform: Matlab, Scripts

This program calculates the beats per minute of of an ECG signal. The data file should be in 'csv' format. The output will be an averaged value, since normal ecg of a person is not always constant. There maybe drifts and variations. The percentage error for six seconds of the ecg will be 60/sampling frequency.

  • Publisher: Arun Kumar
  • Date: 18-06-2013
  • Size: 10 KB
  • Platform: Matlab, Scripts

This program deals with the implementation of a sound file of 2 second duration on an LTI system, resulting in the increase in delay and duration of the sound file..

  • Platform: Matlab, Scripts

The proposed algorithm is based on nonlinear derivatives to automatically select the best edge information. This algorithm can replace the classical derivative with the following benefits: - univocal edge localization for synthetic and real images - noise reduction with no regularization: the noise level is weaker that the noise level in the original image - better direction estimation of the gradient - can product a confident edge reference map with synthetic images - extremely efficient on salt noise OR pepper noise (this last case needs a change in the nonlinear derivatives) - still noise reduction with regularized schemes (Canny, Demigny, .

  • Platform: Matlab, Scripts

Add, move and delete points to form a desired spectral curve. The result can be saved to workspace as linear or minimum phase FIR..

  • Publisher: Matthes
  • Date: 21-06-2013
  • Size: 10 KB
  • Platform: Matlab, Scripts

This model permits the path loss calculation using Edwards and Durkins model..

  • Publisher: Joao Carmo
  • Date: 26-05-2013
  • Size: 10 KB
  • Platform: Matlab, Scripts

This script demonstrates the influence of range reduction algorithm at low bitrate encoding using JPEG encode. The range [0-255] of pixel values is mapped to [64-235] in this script using a look-up-table. Subsequently, the file is compressed to achieve the same bit-rate (file size) as that of the compressed full range image.

  • Platform: Matlab, Scripts

Efficiency Network Analyser (E.N.A.) calculates, through a graphical user interface, the performances of the main multiple access protocols in the comunication networks in different load conditions. The used protocols are: FDMA & TDMA; Aloha & Slotted Aloha; CSMA & CSMA/CD; Multiple Token, Single Toke & singole Packet.

  • Platform: Matlab, Scripts

The different low dimensional embeddings are an orthonormal coordinate system generated from a 1. Diffusion process defined on the data 2 . Normalized Laplace Beltrami operator 3. Normalized Focker Plank operator This is a nonlinear dimension reduction technique using the concepts of manifold learning.

  • Platform: Matlab, Scripts

eJabberd Joomla Integration Plugin allows the eJabberd XMPP (Jabber) Server to authenticate against the Joomla user database. This allows members of your Joomla website to have Instant Messenger accounts at your domain. Please Check out the wiki installing_eJabberd for more information For more help please d comment in our wiki section.

  • Platform: PHP, Scripts

The signals presented here can be used in demonstrating how the signal varies when the operation is made on either independent variable or dependent variable. The parameters can be varied to have a feel of the variation. Example(1): rect(1,2) plots the rectangular signal of amplitude 1 and a width of 2.

  • Platform: Matlab, Scripts

The Empirical Mode Decomposition is a technique to decompose a given signal into a set of elemental signals called Intrinsic Mode Functions. The Empirical Mode Decomposition is the base of the so-called 'Hilbert-Huang Transform' that comprises also a Hilbert Spectral Analysis and an instantaneous frequency computation.

  • Platform: Matlab, Scripts

Very simple program to convert regular ASCII text to a block of binarry numbers and vise versa. Just run the following commands to view an example: encode('test.txt','binary.txt') decode('binary.txt','ascii.txt').

  • Platform: Matlab, Scripts

This is a collection of m-files I created to complete a research project into the DC components of various encoding techniques. Eight of the files create random bit sequences that conform to their coding requirements. The others were files I found useful in the scope of the project and supplement the g.

  • Platform: Matlab, Scripts

for entropy H = entropy(S) this command will evaluate the entropy of S, S should be row matrix H = entropy([X;Y;Z]) this command will find the joint entropy for the 3 variables H = entropy([X,Y],[Z,W]) this will find H(X,Y/Z,W).. you can use it for any combination of joint entropies Please validate this function before using it.

  • Platform: Matlab, Scripts
  • Envelope
  • License: Freeware
  • Price: 0.00
  • Rating

This function begins by deducing the wavelength of the signal's primary Fourier component. It then smooths the signal using a moving-window average -- the window is roughly top hat, of size equal to the primary wavelength. For 2-D data it will perform this function on each column of data, using the primary wavelength of the central column throughout.

  • Platform: Matlab, Scripts

The classical envelope detector with diode and RC group is compared with its discretized implementation. A reset input is also given in order to discharge the capacitance..

  • Platform: Matlab, Scripts

Some curve fitting or smoothing tools can benefit from knowledge of the noise variance to expect on your data. Kalman filters use this information, also some spline fitting tools. So I wrote a function to extract the noise variance from a signal vector.

  • Platform: Matlab, Scripts

Ethereal is a free software program that can record LAN traffic. The recorded data file shows time stamps, packet lengths, and header and data fields for every captured network packet. This program lets you extract selected header fields from a captured data file and write the fields into MATLAB arrays.

  • Platform: Matlab, Scripts

When audio or video is transmitted over an Ethernet network, the data is usually transmitted in bursts of packets with long idle times in between bursts. SimEvents is a good tool for modeling those types of sources and studying the effects of queue size and server times on the audio or video transmission.

  • Platform: Matlab, Scripts

This program to detects received signal from system that use QAM as modulator. Euclidiance Distance Minimum gets/decides signal based on minimum distance from the others..

  • Platform: Matlab, Scripts

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 all; Clf; n=1:200; y=cos(2*pi*5*n/200)+cos(2*pi*10*n/200)+cos(2*pi*20*n/200)+cos(2*pi*50*n/200); plot(y); /*sampling frequency (fs)=200hz x[t]=x[n*Ts] Sampling period(Ts)=(1/fs)*/ /*The same signal if is non-stationary in nature,i.

  • Platform: Matlab, Scripts

[dec_cod, code_bin, code_book] = lempel_ziv(alf, str) It's a function with three output variables and two input variables. 'dec_cod' is the decimal code that codify the input string 'str'. 'code_bin' is the binary code of the string obtained from the 'dec_cod' conversion.

  • Platform: Matlab, Scripts

This entry provides functions and examples allowing you to create Simulink.TsArray and Simulink.TimeSeries objects from a script or the MATLAB command line. A Simulink.TsArray object can be used as input data for a bus signal input in Simulink. Note: These functions contain **UNDOCUMENTED** functionality that is subject to change in a future MathWorks release.

  • Platform: Matlab, Scripts

A function that codes a string of chars with Lempel Ziv coding.

  • Platform: Matlab, Scripts

EXtrinsic Information Transfer (EXIT) charts are useful for characterizing the convergence properties and the performance of turbo receivers. Turbo receivers are generally constructed from two or more Soft Input Soft Output (SISO) modules. By simulating a single SISO module, the transfer characteristic of the SISO module can be obtained using the EXIT class.

  • Platform: Matlab, Scripts

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