Adding White Noise (Gaussian Noise) To a Set of 3D Points
Hi All, Could somebody please tell me how I would go about adding white noise to a set of 3d points. I am looking to implement this in c++ so if anybody already has a library or some code snippet as an example it would be much appreiciated. Adam "Adam Hartshorne: > Could somebody please tell me how I would go about adding white noise to > a set of 3d points. Could you please explain what do you mean by adding noise to a set of points? You mean: jitter the coordinates? Or what? Anyway, white noise is an ultralocal distribution, for different points its values are *unc...

Adding White Noise (Gaussian Noise) To A Set Of 3D Points
Hi All, Could somebody please tell me how I would go about adding white noise to a set of 3d points. I am looking to implement this in c++ so if anybody already has a library or some code snippet as an example it would be much appreiciated. Adam Adam Hartshorne wrote: > Could somebody please tell me how I would go about adding white noise > to a set of 3d points. I am looking to implement this in c++ so if > anybody already has a library or some code snippet as an example it > would be much appreiciated. You might want to look in the archives for "Availabe C++ Librar...

How to add white gaussian noise or any other noise in sgnal waveform and normlize it?
In one signal waveform has been normalized by flicker noise as below. f= 0:100; % frequency points fn = 100; % Nyquist rate F= f/fn; % frequency vector M= abs(100./sqrt(f)); % normalized fequency response M= [zeros(1,6),M(6:100)]; % bound from zero frequency [b1,a1] = yulewalk(3,F,M); % generate order=3 filter And then using this b1,a1 co efficient graph has been drawn, I want to do same thing using any other noise like white Gaussian noise or other, how can I do it? I am from IT back ground so don't know well how to play with signals, please help.... Have you looked at...

will subsampled 2-D Gaussian White noise still be white?
Hi, everyone: I generated a 2-D matrix with spatially-uniform Gaussian White noise. Then I fourier transformed the matrix to frequency domain, and sub-sampled it by a factor of 4. Since the the sampling rate is only 1/4 of Nyquist, there will be aliasing in the new matrix. So the new noise distribution is no longer spatially uniform. But will this non-uniform spatial distribution change the power spectrum density of original white noise? Can I say that the resultant noise is not white noise? Thanks a lot! On Sep 1, 5:19=A0am, "sheng fang" <maelstro...@gmail.com> wrot...

question about white gaussian noise
does additive white gaussian noise only change the amplitude of a signal or does it change both amplitude and phase? "bamse" <bamse@kyllingen.dkkkk> wrote in message news:<6BEnc.4$NS3.3@news.get2net.dk>... > does additive white gaussian noise only change the amplitude of a signal or > does it change both amplitude and phase? There are two ways of looking at Gaussian noise: Time domain: Random numbers are drawn from a Gaussian distribution and added to the samples in the signal, thus "changing the amplitude" of the individual samples. Frequency domain...

additive white Gaussian noise
Hello all please help me ; If I want to generate the following signal x= u*h ; y= x+ n ; u=[1 1 1 1 -1 -1 -1 -1 ] ; h= random('rayl',1,8 ) ; I want the signal to noise ration to be 5 dB ; I am generating 8 random Rayleigh fading envelopes and multiplying them by 1 or -1 according the the Hypothesis ( In wireless sensor Network ) ; Will I have to use var(x) ... to calculate the signal power and after that calculating the required noise power ? In some references they use the following formula : SNR= mean(x)/ std(n) In the paper which I am trying to implem...

white gaussian noise #3
hello, need urgent help. can someone explain me how does the white gaussian noise works?...how can i simulate such a signal???... thank you, Artur "Artur Racu" <arturracu@yahoo.com> wrote in message <hrnhb0$s8i$1@fred.mathworks.com>... > hello, > > need urgent help. can someone explain me how does the white gaussian noise works?...how can i simulate such a signal???... > > > thank you, > > Artur if you have communications toolbox doc awgn doc wgn No toolbox doc randn "ade77 " <ade100a@gmail.com> w...

question about white gaussian noise
does additive white gaussian noise only change the amplitude of a signal or does it change both amplitude and phase? Going from off the top of my head here, so correct me if I am up the garden path on a frosty morn. Gaussian noise is continuous frequency spectrum (ie not discrete frequencies) at random positions in time, thus should not have a phase. As far as the amplitude goes, if you multiply noise by 2, its amplitude becomes larger (doubles). And, if you add it to itself, with no time delay, then it is the same as multiplying by 2. However, if you add 2 seperate lots of equivalent am...

additive white gaussian noise
Hi Does anyone know the algorithm or have a source code for applying Additive white gaussian noise? thanx very much -M- Mesvak wrote: > Does anyone know the algorithm or have a source code for applying > Additive white gaussian noise? For algorithms also try 'comp.programming'. Another newsgroup to visit for math stuff is 'sci.math.num-analysis'. Here we mostly discuss C++ language issues, and dispensation of algorithms and sources is usually done elsewhere. Like the Web. FYI. V -- Please remove capital 'A's when replying by e-mail I do not respond t...