Search Engine www.edaboard.com

76 Threads found on edaboard.com: Cross Correlation

Cross Correlation and sigma evaluation in simulink

In a processing before receiver block Through the processing in this block we add the signals of the transmitted one, so the noise is also added; I would like to compute the new standard deviation σ of the signal. In order to get σ , I cut the path of the TX RX by "Gaussian noise Generator" with variance 1 and mean is 0 and I use the

cross-correlation verilog

how can we write a code to find cross-correlation or auto cross-correlation in verilog? actually we are trying to find the delay between a pulse and its echo. we have the signal coming from an 8-bit ADC and we keep it in a RAM. then we need to find the max value of the correlation to determine the delay (...)

how can I find the delay between two seperate sine waves

Did you try cross-correlation?

Image Registeration using OpenCV

Hi All, I'm trying to find the movement between two different image for images' registration. In order to speed-up things, I'm trying to find the maximum of the cross-correlation of the two images. I'm using OpenCV - the cvDFT() to generate the two Fourier transforms and than, using the cvMulSpectrums() to obtaining the cross-corre

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

WALSH CODES and orthogonality

cross correlation is zero, this is what is meant by orthogonality specific to CDMA (other definitions may also be correct) The orthogonality is required to have no interference between physical channels

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

How do i map a simulink based algorithm on a FPGA

Hi! I have been working on EDK for some weeks now . Now i have been given a simulink based object tracking model , how can i map this cross-correlation based algorithm on virtex series FPGA. Do i need to redesign the algo with Xilinx blocks and MCode in simulink and use system generator to wrap them and integrate it into main design or there is

CDMA codes - relationship between walsh and PN codes

Auto corr and cross have the same difference regardless of where you apply them

correlators - need to implement a correlator in the mcu

hello, i have rf unit connected to DIGITAL MCU. the rf tranceiver gives RX_DATA after fsk demodulation, i need to implement a correlator in the mcu. what does it mean to impelement a correlator ? and what is a peak correlation ? (i know what is cross/auto correlation) i think i need to count errors in the preamble and by that (...)

Explain to me Generalized Cross Correlation

Can somebody explain to me what GCC (Generalized cross correlation) is? How does it differ from regular cross correlation? Thanks.

help on PN sequence required

Ideally, random sequences should have a infinite length. But Pseudo-Random (PN) sequences are finite length sequences with semi-randomness in the elements in sequences. Some examples are M (or maximal length)-sequence, Gold sequence. They show good but not ideal correlation properties, i.e., auto-correlation for non-zero shifts and (...)

Coupling reduction between antennes.

Decoupling two antennas can lead to improve the antenna system performance. But sometimes decoupling is not enough and you also need to decorrelate the antennas: high C11 (autocorrelation) and low C12 (cross-correlation). C11 is somehow the radiation efficiency, and C12 is the energy radiated from one antenna but coming from the other (...)

Signal processing related

Hello, What is the applications of cross correlation and Auto correalation? Regards, N.Muralidhara it is used in receriver desin

How to compare heart pulse signals?

you can use a comparator to detect whether the signals are similar are not .... cross-correlation is another technique in DSP for detecting the similarities in the signals.

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 181(0-

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 181(0-

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

Time delay estimation by micro-controller

Do you think it is possible to estimate the delay between two sinusoidal signals by using cross correlation calculation and implementing with a micro-controller (e.g. ATmega)? Is there any good idea?