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## Cross Correlation |

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cross correlation matlab , correlation , correlation matlab , phase correlation

76 Threads found on edaboard.com: **Cross Correlation**

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

Digital Signal Processing :: 04-02-2012 15:02 :: ws6transam :: Replies: **3** :: Views: **893**

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

Elementary Electronic Questions :: 03-20-2012 11:16 :: mocheck :: Replies: **0** :: Views: **784**

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(

Mathematics and Physics :: 03-20-2012 11:15 :: mocheck :: Replies: **0** :: Views: **1283**

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

Elementary Electronic Questions :: 03-19-2012 02:42 :: kaleza :: Replies: **0** :: Views: **580**

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** (...)

Professional Hardware and Electronics Design :: 01-23-2012 19:19 :: klystron :: Replies: **9** :: Views: **2413**

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

Digital Signal Processing :: 01-12-2012 05:41 :: avins_1234 :: Replies: **1** :: Views: **972**

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**

Digital communication :: 12-13-2011 18:47 :: g.hadzhiyanev :: Replies: **0** :: Views: **1186**

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 (...)

Digital Signal Processing :: 09-23-2011 16:33 :: ganesh singadkar :: Replies: **0** :: Views: **2347**

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.

Digital Signal Processing :: 09-13-2011 04:32 :: electricalpeople :: Replies: **4** :: Views: **24602**

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

Digital Signal Processing :: 09-07-2011 02:49 :: zorro :: Replies: **6** :: Views: **2112**

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

Digital Signal Processing :: 08-07-2011 08:12 :: purifier :: Replies: **0** :: Views: **1064**

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

PC Programming and Interfacing :: 07-11-2011 18:18 :: sagar474 :: Replies: **7** :: Views: **3670**

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 (...)

ASIC Design Methodologies and Tools (Digital) :: 06-17-2011 09:20 :: always84 :: Replies: **0** :: Views: **2559**

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

Elementary Electronic Questions :: 05-30-2011 15:39 :: Inekey :: Replies: **0** :: Views: **1367**

I know that band limiting a single timestream of white noise will turn the auto**correlation** 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 (...)

Elementary Electronic Questions :: 04-30-2011 15:34 :: phys314 :: Replies: **2** :: Views: **904**

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

Digital Signal Processing :: 03-26-2011 11:51 :: rsram :: Replies: **0** :: Views: **1010**

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. (...)

Elementary Electronic Questions :: 02-22-2011 16:17 :: manoranjan sb :: Replies: **0** :: Views: **2107**

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,

Digital communication :: 01-19-2011 18:50 :: Aya2002 :: Replies: **2** :: Views: **2632**

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 -

Digital communication :: 01-15-2011 02:33 :: VSMVDD :: Replies: **2** :: Views: **3939**

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 auto**correlation** matrix and Rxy is **cross**-**correlation** matrix.
What I want to ask is how to find these Rxx and

Digital communication :: 11-14-2010 15:11 :: MatsuriSola :: Replies: **0** :: Views: **1635**

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