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# Cross Correlation Matlab

21 Threads found on edaboard.com: Cross Correlation Matlab

## Cross-Correlation between signal and the delay version

hiii Sorry once again .... I could not found function 'modnorm' and 'qammod' in the function func_ofdm_generate....... Please post your complete code then only one can run this and give you some feedback..... Sorry for that I went to mathworks site I think these are the function from "Communications System Toolbox" ...... I don't have th

## Cross-correlation function problem

Hello everyone, I have a following problem: given cross-correlation function {C_{12}}{\left(\tau\right)} associated with a pair of time functions {f}_{1}(t) and {f}_{2}(t): {C_{12}}{\left(\tau\right)}={3 cos}^{2 }{\sigma}{t sin}{\sigma} {t} if {f}_{1}(t) =\frac{ 1}{2 }+\frac{1}{4}cos {\s

## Generalized Partial Response Equalizer Matlab Implementation

I need to implement following expressions for the GRPE in matlab lembda = inv(E*inv((A-T'*inv(R)*T))*E) *c; g = inv(A-T'*inv(R)*T)*E*lembda f = inv(R)*T*g where R:autocorrelation of channel output T:cross correlation of channel out put and input data A:autocorrelation of input data i only (...)

## Comparing two signals using correlation in matlab

See what I am getting is that u dont know what cross correlation means... When there u find the cross correlation between signals A and B, U are actually judging the how closely A and B are related. =xcorr(A,B,maxlag); stem(lag,corr); what it does that with different- different lags compares A and B. and gives u the (...)

## Matlab cross correlation code

i want cross corelation matlab code for m-seq.:- x=; y=; and for gold codes:- x=; y=; regrdes

## autocorrelation & crosscorrelation of image in matlab

hi, i want to find the auto correlation & cross correlation in horizontal ,vertical & in diagonal direction of the output image obtain after doing the quantization of image*(*this image is obtain after taking the FFT of image & then finding the magnitude of that image)in to four level(quantization is done by dividing the minimum to maximum (...)

## Cross-correlation in matlab without using the inbuilt function?

can someone tell how to do the cross-correlation of two speech signals(each of 40,000 samples) in the matlab without using the inbuilt function Xcorr and how do I find correlation coefficient? Please be tolerant.Thanks in advance.

## MATLAB and webcam interface

download this source code Sagar's Lab: Object tracking using corss correlation ---------- Post added at 20:18 ---------- Previous post was at 20:16 ---------- use matlab image and video acquisition tool box. study t

## matlab bode plotting of fft result

Hy, my problem is: using matlab, how can i plot in a bode diagram the result of a fft? I have defined a function take after many elaborations bring out two vectors and than make the cross-correlation. Than i make the fft of the cross-correlation obtaining complex conjuncted numbers, i need to have the (...)

## ecg signal processing regarding

i've added noise to ecg signal taking specified level of snr as input assuming original signal is clean and obtained snr after denoising using cross correlation now I have to determine the snr of original data are there any algorithms to compute snr when data alone is given? any help algorithm or matlab code for this calculation is (...)

## Ask : Regarding Autocorrelation and Cross-correlation matrix in LMMSE Channel Estimat

Currently I want to make a matlab simulation of LMMSE channel estimation method in OFDM systems. In LMMSE method (Wiener Filtering) to find the channel estimation we have to find coefficient : c=(Rxx^-1)*Rxy where Rxx is autocorrelation matrix and Rxy is cross-correlation matrix. What I want to ask is how to find these (...)

## How to do correlation between signals in Matlab?

Use the cross correlation command in matlab i-e xcorr(y,z). The peak will indicate the presence of signal of interest in that signal.

## cross correlation in matlab - problem

Hello I m trying to estimate time delay between signals using cross correlations. Unfortunately I ve encountered a few problems I m unable to handle. Here is code what I ve done. According to article I ve read it is supposed to be working. I m expecting at the last figure, one peak which should indicate a delay between signals x1, and xr, but

## Pattern Recognition(Matlab)

Hi, Template is the pattern you want to find in the image. For example if you are looking for circles in an image, a smaller image containing only a circle is the template. Once you calculate the cross-correlation between a template T and an image I, you obtain an image X. The location of the pixel with the highest value in X will give you t

## Calculating correlation between the E-fields of two antennas

Hi all, I am having a bit of a problem computing the cross correlation between two Electric-field patterns of antennas. I will try to state my problem clearly: I have E-field values of an antenna for each value of phi and theta. The E-field values are complex numbers and are given as dB V/m. So in matlab I have a Matrix of dimensions (...)

## Calculating correlation between the E-fields of two antennas

Hi all, I am having a bit of a problem computing the cross correlation between two Electric-field patterns of antennas. I will try to state my problem clearly: I have E-field values of an antenna for each value of phi and theta. The E-field values are complex numbers and are given as dB V/m. So in matlab I have a Matrix of dimensions (...)

## How to do cross correlation in Matlab?

hi guy, i have 2 channels of signals(multi frequencies, with time and voltage recorded) from 2 microphones at different locations, I would like to find out the magnitude ratio and phase different between the 2 signals. can anyone tell me the procedures for getting these? I know I need to do the fft and cross correlation, but I just don't know wha

## urgent help matlab auto correlation and cross correlation

hi all i need matlab auto correlation and cross correlation function codes ;can anybody help me please ?

## cross correlation and auto-correlation question

Hi, In matlab you can use the command "xcorr" in order to find the correlation. the command takes a vector or two and calculates the correlation and cross corelation. But the problem is that the out put is a vector!!! you have two soloutions to find the correlation matrix. 1- change the elements of (...)

## What does maximum lag signify? (Matlab)

Hi abhi, From matlab help: XCORR(...,MAXLAG) computes the (auto/cross) correlation over the range of lags: -MAXLAG to MAXLAG, i.e., 2*MAXLAG+1 lags. If missing, default is MAXLAG = M-1. Probably you are getting this message because the second argument is a scalar. Regards Z