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# Noise Zero Mean

29 Threads found on edaboard.com: Noise Zero Mean

## SNR Analysis calculation

HI I am using this formula for snr SNR=10log(Ps/σ^2) where Ps is the power of my signal and σ^2 is the noise variance. where noise has gaussian distribution with certain mean. I wanted to ask is this formula valid only when the noise is zero mean? if so what if my (...)

## matlab code for received matrix

how to write a matlab code for generating received e in e=hG+n channel :?: zero-mean Gaussian noise

## Gaussain Noise in Matlab 1/sqrt(2) (randn(no of bits)+j.*(no of bits))

could somebody please brief me the following method of generating Gaussian noise specially the term sqrt(2), i.e., why it has been used here Gaussain noise in Matlab 1/sqrt(2) (randn(no of bits)+j.*(no of bits)) Thank you very much for your time!

## How to find the covariance of a random vector in MATLAB

OK, that is good. I need to find the covariance matrix of a noise vector. Now I have the covariance matrix mathematically, but I want to make sure my derivation is correct. The noise vector is Gaussian with zero mean. So, based on what you said I can do the following: (...)

## Removing noise by superimposing quasi periodic biomedical signals

Hi everyone, I'm fairly new to signal processing. I'm doing a project which involves superimposing quasi periodic bio-medical signals (emg or egg signals) to remove the noise (the noise approaches zero because its mean is zero) so I can calculate the signal to noise ratio (SNR). The (...)

## Application of probabilistic methods for determination of signals

A random signal from a deep-space probe is uniformly distributed between 17.324V and 32.574V. It is observed in the presence of Gaussian noise N having zero mean and standard deviation of 9V. If the observed value of the signal plus noise is 19V, find the best estimate of the signal amplitude. In a stormy sea, the (...)

## coherent and non-coherent addition- ICI cancellation technique

Hi ReComm, Let see this example: R1 = S + n1 R2 = S + n2 where S is the "useful signal" and n1, n2 are non-correlated noise contributions with zero mean and standard deviation sigma. The addition is R = R1 + R2 = 2*S + n1+n2 The total signal is 2*S and the total noise contribution is (...)

## plz explain zero mean

hi can anyone tell me what is meant by zero mean if i have zero mean of a guassian random variable noise has zero mean??? but variance N0/2 also explain this with help of a diagram how zero mean value can be represented (...)

## Voice activity detection using zero crossing rate

i m doing VAD based on zero crossing rate.i have studied papers and come to know that zero crossing rate threshold is ZCRT=mean(noise)+5*standard deviation(noise) how can i set value of detection?how can i implement ZCR in SIMULINK? is there any other method?

## strong noise which has zero mean & BP filter

Hi, I am adding strong noise which has zero mean to an OOK modulation. I use for that the matlab function 'randn'. But after this, I apply a chebyshev 3? order bandpass filter and I don't really know if the output signal would have the same property of zero mean or not? Thanks in advance

## matlab code for white gaussian noise

Hi everybody! Can you help me to write in matlab code a zero-mean white gaussian noise with variance=10^-4 Thanks so much!!

## Looking for several programs in Matlab

11. Waveform synthesis using Laplace transform 12. Locating zeros and poles, and plotting the pole ?zero maps in S-plane and z-plane for the given transfer functions 13. Generation of Gaussian noise (real and complex), computation of its mean, M.S. values and its Skew, Kurtosis, and PSD, probability distribution function (...)

## FFT window used in matlab function fft()

I have question regarding fft function in matlab. If I do something like: t = 0:0.001:0.6; x = sin(2*pi*50*t)+sin(2*pi*120*t); y = x + 2*randn(size(t)); plot(1000*t(1:50),y(1:50)) title('Signal Corrupted with zero-mean Random noise') xlabel('time (milliseconds)') Then which window is being used by MATLAB. I looked into help of (...)

## how to find snr of a signal, which real value is unknown?

Y(t)=X(t)+R.V~(mean=0,known variance) You can use the info that noise is a RV that has a zero mean and is Wide Sense Stationary. So, I think, when you can transmit the same signal X many times and monitor the o/p Y's. The average of Y's is a good estimation of X, assuming you transmitted X infinity times.

## How to implement a PLL lock detector?

Hi, A good method is to use a second phase detector (PD) that compares the phase of the incoming signal with the VCO shifted 90 degrees. When locked, the (filtered) output of this second PD is a DC. Without input signal, the output is zero (or noise if the input is just noise). When unlocked, the output oscilates with (...)

## noise parameter of mos

Hi all, The channel noise of a mos transistor depends on zero bias drain conductance gd0... what does it really mean? zero-bias (is it bias gate equal zero or drain zero?). How could I extract from simulation this parameter? what about γ and δ? how could obtain these (...)

## noise parameter of mos designing LNA

Hi all, The channel noise of a mos transistor depends on zero bias drain conductance gd0... what does it really mean? zero-bias (is it bias gate equal zero or bias drain zero?). How could I extract from simulation this parameter? what about γ and δ? how could obtain these (...)

## How to write a Matlab program to generate White Gaussian Noise (WGN)?

it would be very simple if you use matlab in the simulink toolbox you can add this noise directly to your system

## How to write a Matlab program to generate WGN?

i've read that white gaussian noise has zero mean and a variance of 1. at the same time, the power spectral density has to be uniform all throughout in frequency. i am confused as to how to program in mathcad to generate this noise and i need some clarification to fully understand this. thanks for the help in advance.

## Help me understand random variable in DSP

hi guys, im having great trouble understanding the random variable part in dsp subject. hope any one could post me link or book i can study to understand this. 2) im not sure how to solve this problem: Let x be a zero-mean white noise sequence of unit variance. For each of the following filters compute the output autocorrelation Ryy(k)

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