Correlation Toefl Cbt
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.
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (47): Coherent QPSK simulation and BER vs. SNR curve Download |
DFT plays important role in DSP and used in wide variety of applications like correlation and spectral analysis. Understanding quantization errors in its computation is an important aspect of its design either for s/w or h/w implementation.A complex DFT of N points has N complex (4N real)...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (47): A 32 point FFT in embedded MATLAB using fixed point arithmetic Download |
This file set includes a top level unsychronized Tx / Rx model and a more detailed synchronized Rx model. The top level model Tx outptut has been tested with a third party reference mil-std-188-110 modem and found to generates compliant waveforms. A variable symbol rate Tx driving the...
Platforms: Matlab
License: Freeware | Size: 3.31 MB | Download (53): A Synchronized Mil-Std-188-110B Receiver Download |
A fast vectorized implementation of the ncc that handles color (3 channel) images as well as gray level.The algorithm for colored images is based on the ncc formulation for vector valued functions.Note: A bug that I found in the normxcorr2 was also fixed here.
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (47): Fast normalised cross correlation for gray-level and color images Download |
Develop a Matlab program to demonstrate a neural network autoassociative memory. Show the importance of using the pseudoinverse in reducing cross correlation matrix errors. Show the performance of the autoassociative memory in noise. The results are contained in the Matlab file assoc_mem_demo.m
Platforms: Matlab
License: Freeware | Size: 880.64 KB | Download (48): autoassociative memory Download |
This is a small example code for "Steepest Descent Algorithm". It implements steepest descent Algorithm with optimum step size computation at each step. The code uses a 2x2 correlation matrix and solves the Normal equation for Weiner filter iteratively.Reference:Adaptive Filter Theory 3rd...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (44): Steepest Descent Algorithm Download |
Let us assume the following MIMO model:Y(k)=HX(k)+Y(k)This file can detect the number of sources, i.e the size of the vector X(k) from the received signal Y(k). The noise is assumed spatially white and the number of receivers must be strictly greater than the number of sources. For more details...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (47): Blind detection of the number of sources with hypothesis tests Download |
Only in very simple situations can we describe the correlation between two time series as a single number. Often it varies both as a function of time, and of wavelength. Datasets may be uncorrelated on short timescales due to noise, but strongly correlated on larger wavelengths (eg annual).This...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (49): Comparing Time Series using Semblance Analysis Download |
Used on cellular phones to filter outbackground noise. Measure the signal to noise ratio of an audio input in realtime. Pass speech but give silence where the input is noise (hiss, snap crackle and pop).Includes a tutorial on how to use statistics (correlation coefficient) to calculate the signal...
Platforms: Matlab
License: Freeware | Size: 1.03 MB | Download (45): Audio Noise Gate for Texas Instruments C5510 / C6713 Download |
The zip file contains functions to calculate an Ambiguity Function (XAMB), Upsampled and Interpolated Correlation (XCORRU), and Coherence Function (XCOH). A prefilter can be specified in each function to "sharpen" correlation peaks.XAMB calculates an estimate of the (cross-)ambiguity function. A...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (42): Calculate Ambiguity Function and Utilities Download |
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...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (43): Effect of Range Reduction in Video/Image Compression Download |
Compilation of .m files to calculate strain from images independent of physical size of the samples. Strain can be calculated in horizontal as well as vertical direction. The functions were developed at the Johns Hopkins University by Rob Thompson, Daniel Gianola and me, all of us part of the...
Platforms: Matlab
License: Freeware | Size: 1.73 MB | Download (42): Digital Image Correlation and Tracking Download |
Linear feedback shift registers (LFSR) are a simple method of generating sequences, including pseudorandom number sequences. The LFSR code provided is very unrestricted, allowing for any feedback polynomial, initial state or decimation factor. The code is written for a 32 bit LFSR, but minor...
Platforms: Matlab
License: Freeware | Size: 20.48 KB | Download (43): Kasami Sequences, m-sequences, Linear Feedback Shift Registers Download |
The CMVE toolbox estimates missing values by using correlation structure of the data. The software can be used to impute missing values in any correlated data especally microarray gene expression data. The imputation performance of the software has proven significant affect on gene regulatory...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (50): Collateral Missing Value Estimation: a new robust missing value estimation algorithm for microarray Download |
These routines support the book "Risk and Asset Allocation" Springer Finance, by A. Meucci, see http://www.symmys.comThe routines include many new features:- more uni-, multi- and matrix-variate distributions- more copulas- more graphical representations- more analyses in terms of the...
Platforms: Matlab
License: Freeware | Size: 6.62 MB | Download (46): Risk and Asset Allocation Download |
Features:1. the program calculates the matter power spectrum, temperature spectrum, polarisation- and cross-correlation spectrum of a curved or flat Friedman-Robertson-Walker universe.2. it calculates the age of the universe, sigma8 and the age of the first start formation.3. massless neutrino's,...
Platforms: Matlab
License: Freeware | Size: 716.8 KB | Download (47): CMBACCUR Download |
Reporting tool, with leading indicators for each asset, for an example Quantitative Fund.This asset definition is read by the runregression.m matlab file submitted elsewhere and allows to compute correlation coefficients and assign weights to relevant indicators when doing forecasting.
Platforms: Matlab
License: Freeware | Size: 2.55 MB | Download (44): Asset Definitions for Forecasting Download |
In signal processing, cross-correlation is a measure of similarity of two waveforms as a function of a time-lag applied to one of them. This is also known as a sliding dot product or inner-product. It is commonly used to search a long duration signal for a shorter, known feature. It also has...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (40): Crosscorelation Download |
sysshift checks whether two matrix M1 and M2 are systematically shifted against each other by calculating correlations across a range of shifted origin. This is helpful e.g. if two different digital elevation models of the same area are to be tested for systematic misregistration.At this point,...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (45): Sysshift Download |
This is a collection of functions I wrote for use of MATLAB with tree-ring time series. Functions are included for skeleton plotting, group time-series plotting, and correlation analysis of seasonal climatic time series with tree-ring indices ("tree-ring response-functions").
Platforms: Matlab
License: Freeware | Size: 61.44 KB | Download (48): Tree-Ring MATLAB Toolbox Download |