autocorrelation problem

Started by t_katrina in Matlab DSP16 years ago 3 replies

Hi everyone, I need help in autocorrelation. I have generated a particular sequence code, C of period 15 and need to find its...

Hi everyone, I need help in autocorrelation. I have generated a particular sequence code, C of period 15 and need to find its autocorrelation. I need to get the values at given lags from i = 0 to i = 15. For example when i = 0, it's a perfect autocorrelation (no lag) so I


autocorrelation of two dimensional arrays

Started by aycece in Matlab DSP10 years ago

Hi, I have a one dimensional sequence which I construct two dimensional arrays preserving the autocorrelation properties. I want to calculate...

Hi, I have a one dimensional sequence which I construct two dimensional arrays preserving the autocorrelation properties. I want to calculate the autocorrelation function of this array and then plot it in 3D. But I don't want to use the xcorr. Can you recommend me a resource to write my own code? I will appreciate any help. Thank you very much. A.


How to convert an autocorrelation function to a signal

Started by arthanareeswaran palaniappan in Matlab DSP11 years ago 1 reply

Hai My project work involves conversion of PSD into its signal. I have the variation of PSD with frequency. Using FFT I can change this PSD...

Hai My project work involves conversion of PSD into its signal. I have the variation of PSD with frequency. Using FFT I can change this PSD into autocorrelation. Pl suggest me whether it is possible to get the signal from its autocorrelation function, Is it so suggest me in this regards Regards Easwar


autocorrelation

Started by Valeria in Matlab DSP14 years ago 1 reply

Dear all, How to find the autocorrelation function of complex signals using Matlab? Valeria ...

Dear all, How to find the autocorrelation function of complex signals using Matlab? Valeria


Cyclic Autocorrelation!

Started by Shailesh Khanolkar in Matlab DSP12 years ago

Hi, How do i obtain/simulate the cyclic autocorrelation of a cyclostationary process? Shailesh

Hi, How do i obtain/simulate the cyclic autocorrelation of a cyclostationary process? Shailesh


autocorrelation of a binary sequence

Started by mohan prasad in Matlab DSP15 years ago

Hi all, I have the following output from a 4 stage shift register.0101101110.Now I need to find the autocorrelation of this...

Hi all, I have the following output from a 4 stage shift register.0101101110.Now I need to find the autocorrelation of this sequence.Is there anyway we can do this in MATLAB or by hand? Regards, Mohan


Autocorrelation problem solved

Started by katrina tao in Matlab DSP16 years ago

Hi all, the autocorrelation problem I poseted earlier have been solved! Thanks so much to all who have replied...really appreciated...

Hi all, the autocorrelation problem I poseted earlier have been solved! Thanks so much to all who have replied...really appreciated it! :) Kat~


Autocorrelation function of bandpass stochastic process

Started by rmartis80 in Matlab DSP12 years ago

I am new to band pass stochastic processes. power spectral density of a low pass gaussian stochastic process x(t) is given. How to find the...

I am new to band pass stochastic processes. power spectral density of a low pass gaussian stochastic process x(t) is given. How to find the autocorrelation function of x^2(t) { x square of t }. Can anybody tell me please.


eigen values of a correlation matrix

Started by haresh29 in Matlab DSP16 years ago 2 replies

hello ppl, i had a question regarding eigen values....i have a 1000x1 matrix....i want to compute the eigen values of the...

hello ppl, i had a question regarding eigen values....i have a 1000x1 matrix....i want to compute the eigen values of the autocorrelation of that matrix....but the problem is that eigen value can only be computed of a square matrix and the autocorrelation function in mat


autocorr

Started by Nihal Agaoglu in Matlab DSP13 years ago 4 replies

i have two data as for example V and t how can i find and plot its autocorrelation function thanks...

i have two data as for example V and t how can i find and plot its autocorrelation function thanks...


corrcoef?

Started by "Adnan Pasic (Ado)" in Matlab DSP11 years ago

Hey guys, I desperately need your help, especially because I need this information for a practical exercise at University. All I have to do...

Hey guys, I desperately need your help, especially because I need this information for a practical exercise at University. All I have to do is to calculate the autocorrelation of certain framesizes (in bits) I extracted from a video-file. So, that's what I've done so far: [frametype, framesize] =textread('simpsons_fullhd_high.txt', '%c %d'); And that's how I get a matrix with about ...


Pn sequence generation

Started by muna...@yahoo.com in Matlab DSP9 years ago 2 replies

Can any body give me some reference how to generate PN sequence with required autocorrelation characteristics.If Pi is the sequence of length M ...

Can any body give me some reference how to generate PN sequence with required autocorrelation characteristics.If Pi is the sequence of length M PiPj = M if i =j PiPj = -1 else Thank you Rakesh


autocorrelation

Started by nmoff2003 in Matlab DSP15 years ago

Hi I am computing the autocorrealtion of a speech signal. I know that this is easily done using the xcorr function in matlab. I...

Hi I am computing the autocorrealtion of a speech signal. I know that this is easily done using the xcorr function in matlab. I wanted to use normalised cross-correlation also in computing the autocorrealtion. Does anyone have any ideas about it. Thanks,


Autocorrelating a Radon Transform

Started by honwingh in Matlab DSP13 years ago

Hi all, I am doing a digital fingerprinting project and I am stuck on how to perform a normalized autocorrelation on a radon transform could...

Hi all, I am doing a digital fingerprinting project and I am stuck on how to perform a normalized autocorrelation on a radon transform could anyone on this forum help me please? I have literally taken the radon transform of the image which returns R and xp matrices, then apply xcorr2 to R...the computation takes over 4 minutes and I need to log map it


AR modeling again

Started by M J in Matlab DSP12 years ago

Nishit, Amit and Blessy At first, thank you for your quick reply! I suppose that my problem about input signal wasn't enough clear. In...

Nishit, Amit and Blessy At first, thank you for your quick reply! I suppose that my problem about input signal wasn't enough clear. In the meantime I managed to solve it by avoiding to use input signal at all and therefore partly using solution that Nishit suggested. I'm sending now how this look like. Thanks again. Regards, Miljana! %Generating autocorrelation func...


Autocorrelation and Crosscorrleation

Started by amr hassaan in Matlab DSP11 years ago

Hi all, I'm correlating segments of EEG and EOG records, more or less, these are sequences of discrete values showing the samples of both...

Hi all, I'm correlating segments of EEG and EOG records, more or less, these are sequences of discrete values showing the samples of both signals. literature says that autocorrelating a rectangular window window results in a triangular shaped window, but I'm always having this triangular shaped output except after filteration!! Does anybody have a justification for this?! Thanks in advance...


lpc coefficients

Started by Henry Wijaya in Matlab DSP17 years ago 3 replies

Hi, is anybody familiar with LPC analysis? I tried to write a code that computes the LPC coefficients of a given signal sequence...

Hi, is anybody familiar with LPC analysis? I tried to write a code that computes the LPC coefficients of a given signal sequence using 'autocorrelation method' and 'Durbin's recusion algorithm' to solve for the coefficients. It seems to computes correctly according to the equation:


snr of dsp based am or fm demodulator

Started by bimbo06wole in Matlab DSP10 years ago

does anyone no how one can compute the output SNR of an AM/FM dsp based demodulator using crosscorrelation or autocorrelation.

does anyone no how one can compute the output SNR of an AM/FM dsp based demodulator using crosscorrelation or autocorrelation.


Matlab obtaining power spectrum from ACF and FFT

Started by "ong...@gmail.com [matlab]" in Matlab DSP4 years ago

Greetings, I am using Matlab R2012b 64-bit on Windows 7 in order to estimate the power spectrum of a simple signal that is: cos(10*t) +...

Greetings, I am using Matlab R2012b 64-bit on Windows 7 in order to estimate the power spectrum of a simple signal that is: cos(10*t) + sin(20*t) defined in the time interval from 0.0 to 10.0 Here is what I did: 1) There was no predefined value of points so I took 1001 points by forming a time array and sampled the function at these points. 2) I calculated the autocorrelation function of the ...