Search Engine www.edaboard.com

# Cross Correlation

76 Threads found on edaboard.com: Cross Correlation

## Can I oversample multiple identical digitized impulses to create a composite? How?

71892I have a bit of a problem in that I have some digitally sampled seismic data with an unknown sample rate. It's close to 50 s/second, but not quite. Therefore when concatenating large sets of time-history data, the errors stack up until we see a missed sample, or even two samples that fall on the same instant. Our analys

## Phase relationship from cross-spectra?? Need Help!

Dear all, Suppose I have two signal time series x(t) and y(t) recorded simultaneously and sampled with the same sampling rate. If I understand this correctly, the cross spectrum can be estimated by Fourier-transforming the cross-correlation function, which would be Sxy(f) = F { E{} } and the coherency between

## Cross Spectrum, Coherency and phase corrleation

Dear all, Suppose I have two signal time series x(t) and y(t) recorded simultaneously and sampled with the same sampling rate. If I understand this correctly, the cross spectrum can be estimated by Fourier-transforming the cross-correlation function, which would be Sxy(f) = F { E{} } and the coherency between x(

hi all, in my system I use spreading code and representing -1 with pulse y0 and 1 with pulse y1. e.g. if the sequence is so the tx signal is . how can I check which sequence has been transmitted using correlation? thanks in advance

## Just asking for a high speed sensor..

I assume that you use a cross correlation algorithm between two receivers that is separated by a known distance. The cross correlation peak delay gives the time estimate.The speed is the sensor separation distance / cross correlation time delay. Is your cross (...)

## Implementation of signal correlation in AWR

hello, how to implement signal correlation, auto correlation and cross correlation in AWR visual system simulator ? regards, avin

## Training sequence code

Hi everyone I need a TSC (Training sequence code) for a GSM burst. As far as I know a training sequence has the following structure ABCAB i.e. A is a block of 5 Bits, B is a block of 5 Bits and C is a block of 6Bits. The TSC has to have as perfect as possible auto-correlation and as small as possible cross-correlation

## 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.

## Samples by samples cross-correlation(Xcorr)

Hi, If I understand, you don't need to calculate cross-correlation at all the 79999 time lags, but only at time 0. For this, the first two lines of your code could be modified like this: r1 = abs(xcorr(S1,shat1,0,'coeff')); r2 = abs(xcorr(S1,shat2,0,'coeff')); but this is even faster: r1 = abs(S1*shat1'); r2 = abs(S1*shat2'); The normalization

## Basic question about time series analysis

I am a beginner in signal processing so I apologize in advance if I end up using the wrong terminology. My goal is to find out correlated events in a set of time series data (image attached below) that I have. I figured that using cross-correlation, I will be able to do this. In the first image (the time series plot), I can clearly see that the 3rd

## 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 bode plotting of (...)

## The envelope cross-correlation

Hello. My name is Konstantin. I'm from Russia. Sorry, but I do not speak English. :-( My question is relates to the term the envelope cross-correlation. I am considering a compact loop antenna system with polarization diversity. In the system of measures to increase the degreeof isolation between two closely spaced antennas. The antenna has dim

## Effect of band limiting on cross correlation of 2 white noise timestreams

I know that band limiting a single timestream of white noise will turn the autocorrelation function into a sinc function from a delta function. But suppose I have 2 timestreams of band limited white noise, what effect does the band limiting have on their cross correlation? If I collect an infinite amount of data, 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 appreciated

## how to write and read file file in vhdl

hai i want to read the pixel values of two images and perform correlation between the pixels using vhdl. firstly i got the pixel values of the images and stored the values in two text files. now i want to read values from the text files, perform cross correlation and want to write results to another text file. (...)

## what is cross correlation?

can some one pls tel me what is cross correlation and auto correlation of codes?? why are these two properties so important in cdma of NoC..?? it is very important to you to know at first what is the physical meaning of correlation. It is a comparison of two signals to see the degree of similarity between them,

## Cross Correlation coefficient for complex numbers

use a model of a fixed cohesive vexor or cartesian constraints ... cross corilation need cartesians constrains to work within... cubic vectors ---------- Post added at 04:33 ---------- Previous post was at 04:26 ---------- if you have a large row range use foldover maths 1=1 +1=2 - 2=2 + 2=3 -

## 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 Rxx and