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## Noise Zero Mean |

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phase noise thermal noise , flicker noise thermal noise , noise name , sub noise

phase noise thermal noise , flicker noise thermal noise , noise name , sub noise

29 Threads found on edaboard.com: **Noise Zero Mean**

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 (...)

Elementary Electronic Questions :: 05-23-2014 13:06 :: engr.ihsan :: Replies: **0** :: Views: **576**

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

Digital communication :: 08-22-2013 05:27 :: arushim :: Replies: **0** :: Views: **591**

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!

Digital communication :: 05-29-2013 12:07 :: aliazmat306 :: Replies: **4** :: Views: **2541**

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: (...)

Digital communication :: 05-21-2013 17:58 :: David83 :: Replies: **13** :: Views: **11893**

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 (...)

Digital Signal Processing :: 09-14-2012 14:56 :: John Downs :: Replies: **0** :: Views: **705**

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 (...)

Digital Signal Processing :: 07-28-2012 13:27 :: rupsdbb :: Replies: **0** :: Views: **542**

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 (...)

Digital communication :: 05-27-2011 16:49 :: zorro :: Replies: **1** :: Views: **1866**

hi can anyone tell me what is **mean**t 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 (...)

Digital communication :: 03-11-2011 08:42 :: dhruva :: Replies: **2** :: Views: **1826**

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?

Digital Signal Processing :: 02-23-2011 06:27 :: alirazaghumman :: Replies: **1** :: Views: **2411**

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

Digital Signal Processing :: 12-26-2010 09:26 :: Xavipersonal :: Replies: **1** :: Views: **1150**

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

Elementary Electronic Questions :: 10-05-2010 14:19 :: ardea :: Replies: **2** :: Views: **5464**

11. Waveform synthesis using Laplace transform
12. Locating **zero**s 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 (...)

Elementary Electronic Questions :: 09-30-2010 16:03 :: jravi :: Replies: **0** :: Views: **1030**

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 (...)

Digital Signal Processing :: 08-07-2010 16:36 :: student153 :: Replies: **2** :: Views: **3702**

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.

Digital Signal Processing :: 02-05-2010 11:47 :: hesham_eraqi :: Replies: **7** :: Views: **2568**

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 (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 06-17-2009 12:32 :: zorro :: Replies: **7** :: Views: **12160**

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 (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 04-10-2008 06:44 :: rajanarender_suram :: Replies: **3** :: Views: **1355**

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 (...)

RF, Microwave, Antennas and Optics :: 04-04-2008 23:54 :: paul2 :: Replies: **0** :: Views: **988**

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

Elementary Electronic Questions :: 03-22-2008 09:18 :: bas :: Replies: **5** :: Views: **14079**

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.

Digital communication :: 03-20-2008 04:20 :: thered :: Replies: **0** :: Views: **1463**

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)

Digital Signal Processing :: 03-03-2008 13:42 :: danesh :: Replies: **0** :: Views: **978**