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## White Gaussian Noise |

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1000 Threads found on edaboard.com: **White Gaussian Noise**

Hi Guys:
Is flat band output **noise** is equal to **white** **gaussian** **noise**?. What are the factor contributing to this effects?. Is even order distortion a contribution factor?. Thanks in advance
Rgds

Analog Circuit Design :: 03-19-2005 20:58 :: hrkhari :: Replies: **1** :: Views: **1468**

Y = AWGN(X,SNR) adds **white** **gaussian** **noise** to X. The SNR is in dB.
The power of X is assumed to be 0 dBW. If X is complex, then
AWGN adds complex **noise**.
Y = AWGN(X,SNR,SIGPOWER) when SIGPOWER is numeric, it represents
the signal power in dBW. When SIGPOWER is 'measured', AWGN measures
the (...)

Digital communication :: 03-27-2006 23:28 :: carpa :: Replies: **3** :: Views: **5865**

Hi,
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 to generate this **noise** and i need some clarification to fully understand this.
thanks for the help in advance.

Electronic Elementary Questions :: 03-19-2008 22:46 :: thered :: Replies: **5** :: Views: **8323**

I have samples for **white** **gaussian** **noise**(WGN) w for n = 1:N. The power of this WGN is \frac{1}{N} \sum_{l = 1}^{N} w^2 . I can use this to calculate for given intervals with Matlab but I want to find an analytic expression for this? How do I proceed? Should I be using PSD of WGN ?
M

Digital Signal Processing :: 06-17-2009 11:09 :: magnetra :: Replies: **0** :: Views: **2704**

Dear Sir
i need to know how to add AWGN(Additive **white** **gaussian** **noise**) to a signal using C code...please provide me with some guidelines...

Digital communication :: 09-29-2010 00:17 :: sathishrdh :: Replies: **0** :: Views: **3130**

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

Electronic Elementary Questions :: 10-05-2010 10:19 :: ardea :: Replies: **2** :: Views: **3775**

Hi everbody,
I am working on my course project in developing MSK transmitter and receiver. I have modulator and demodulator working perfectly. Problem comes when i tried to add **white** **gaussian** **noise** in the channel. The receiver output is still the same it has no effect of addition of **white** **noise**. As a (...)

Digital communication :: 12-04-2011 12:59 :: deep8006 :: Replies: **0** :: Views: **348**

Hi everybody guys, I'm writing a signal processing software using C, so I'm a little bit "stuck".
I generated a triangular sampled signal. I need to add **white** **gaussian** **noise** to it at a certain SNR.
I calculated the power of autocorrelation as:
\frac{1}{N}\sum_{i=0}^{N-1}x^{2}
and then divided each element of the array with

Digital Signal Processing :: 10-05-2012 06:10 :: DeliriumCordia :: Replies: **1** :: Views: **508**

Hi guys,
Merry Christmas! I am newbie here and I would like to use the Xilink **white** **gaussian** **noise** generator in Simulink under 2012a matlab to generate the **noise** for my calculation. In the System Generator for DSP reference guide "UG639 (v 13.4) January 18, 2012", it mentioned that the WGNG was built based on (...)

Digital Signal Processing :: 12-22-2012 09:15 :: Adam8198 :: Replies: **0** :: Views: **403**

Hi! what is the standard deviation of **white** **gaussian** **noise** when doing SINR simulation?
I am new to communication simulation. I have a project which needs to calculate SINR. SINR = P/(N+I), and here the **noise** is **white** **gaussian** **noise**. Generally speaking, is there any (...)

Digital communication :: 10-29-2013 22:12 :: kerin :: Replies: **4** :: Views: **284**

Hi max19:77,
I am not familiar with Xilinx library but if you needs Additive Gaussion **white** **noise** most probably you will be able to do it using simple PRBS folowed by the low-pass digital filter and finaly decimator.
Regards
dora

PLD, SPLD, GAL, CPLD, FPGA Design :: 06-28-2004 13:12 :: dora :: Replies: **2** :: Views: **1323**

which are **white** **gaussian** channel characteristic
thank you for help

Digital communication :: 01-22-2007 04:50 :: tti :: Replies: **4** :: Views: **730**

Dear all,
what are the features of **white** **noise** in theory?
2nd-when using "randn" in MATLAB to create a **white** **gaussian** **noise**; what is meant by "**white**" ? I mean that this **noise** isn't infinite. I think it is called "**white**" because it contains most of the (...)

Digital Signal Processing :: 06-12-2008 02:05 :: scholar_a :: Replies: **4** :: Views: **1081**

here is some details on the **gaussian** **noise**
Additive **white** **gaussian** **noise** - Wikipedia, the free encyclopedia
also there is a function in matlab called awgn
you can use the help of matlab to get some details on it
or

Electronic Elementary Questions :: 06-14-2011 16:33 :: flashking :: Replies: **2** :: Views: **5810**

You can generate N samples of complex **white** **gaussian** **noise** with power sigma2 in Matlab or GNU Octave using the randn function:
n = (randn(1,N) + 1j*randn(1,N))*sqrt(sigma2/2);
To check the sample power of this **noise** is approximately equal to sigma2 (for sufficiently large N), you can then use:
Pn = n*n'/N
So, to get yo

Digital communication :: 02-23-2014 17:01 :: weetabixharry :: Replies: **3** :: Views: **306**

what if we use two **noise**s and normalize it to a power P/2 to get P power **noise** at the end ?
Added after 1 hours 19 minutes:
also in case of SIMO (two paths), is one **white** guassian **noise** enough or we need two **noise**s?
Also if we use two **noise**s do we have to normalize the power of (...)

Digital communication :: 03-29-2007 19:04 :: bee :: Replies: **5** :: Views: **1328**

Hey there,
I'm already aware of the in-built MATLAB functions for generating random numbers and **noise** (randn, rand, awgn etc.) It may be an easy solution but I guess I'm unable to see it clearly, so I thought I'd ask for some help here
My task is to create a software model of an LDPC Decoder, Encoder and the sort. While all that is completed th

Digital communication :: 02-04-2012 17:34 :: rayyanc :: Replies: **0** :: Views: **1988**

i want to add **white** **noise** to EEG signal plz tell me the solution

Digital communication :: 05-15-2012 08:18 :: sapanssonar :: Replies: **6** :: Views: **585**

n = 1/sqrt(2)*.
10.^(-SNR_dB(ii)/20)*n
what does the above two equations represeent? i have seen quite a lot to define **noise** but is it exactly they means?
thanks

Digital communication :: 01-19-2013 16:46 :: charly87 :: Replies: **15** :: Views: **2586**

Hi,
I need to made a **white** **gaussian** **noise** generator (VHDL language) for the implementation on a FPGA Xilinx.
Is there anyone that could help me in the implementation with VHDL?
Thank you for your time!
Max

PLD, SPLD, GAL, CPLD, FPGA Design :: 06-25-2004 04:19 :: max19:77 :: Replies: **2** :: Views: **2348**

usually the term **noise** means **white**, **gaussian** distribution. But your question sound as different meaning. Do you ask for **white**, **gaussian** **noise** or for randomatic sparks discharge?

RF, Microwave, Antennas and Optics :: 01-20-2006 17:16 :: sergio mariotti :: Replies: **3** :: Views: **1000**

How can I accurately add to my signal **white**
**gaussian** **noise** of exact SNR in dB (in POWER not
voltage terms)?
when I use awgn(...) function it seems
to me the **noise** has more power than I
set in its SNR parameter.

Digital Signal Processing :: 03-25-2006 00:21 :: lincolndsp :: Replies: **4** :: Views: **2056**

i need help!
how to simulate a **gaussian** **noise** and selective frequency fading channel in CDMA system?
please give me some reference book in this field

Digital communication :: 03-28-2006 04:50 :: hai chau :: Replies: **2** :: Views: **2079**

Looking for the book"signal detection in non-**gaussian** **noise**" by Saleem A. Kassam
Thank you!!

Digital Signal Processing :: 08-21-2006 22:55 :: afrazzzz :: Replies: **0** :: Views: **664**

Hi,
I am analyzing the effect of **noise** on my system.
For this I want to put a **noise** source at the input of the system.
Can anybody tell if there is any voltage source in Cadence which generates **noise**.
I want **white** **gaussian** **noise**.
thanks
sarfraz

Analog Circuit Design :: 10-18-2006 23:28 :: shaikhsarfraz :: Replies: **1** :: Views: **1781**

I assume You used the term "**noise**" as "unwanted effect".
Phenomena like pulse distortion , pulse reflection etc. still exist at all frequencies, low and high.
But why usually it's taken in account at high frequencies? Because the lenght of the line is much longer ?λ .
For such long TX lines , the reflected signal combine it's phase wit

RF, Microwave, Antennas and Optics :: 11-18-2006 11:51 :: sergio mariotti :: Replies: **3** :: Views: **1391**

hi,
how to generate **gaussian** **noise** in pspice

PCB Routing Schematic Layout software and Simulation :: 09-11-2007 04:41 :: vinaiece :: Replies: **0** :: Views: **1029**

Can somebody help me ..
what is the meaning of first line and how and what kind of **noise** is generated
No=1/(exp(EbNo*log(10)/10))
Tx_signal=bpskMod+sqrt(No/2)*randn(1000,1)
sometimes I see
sigma=Engy_of_signal/sqrt(2*SNR)
how is it calculated...
please answer one if not possible for all ..
THankyou so much.

Digital communication :: 01-09-2008 16:06 :: asha19800 :: Replies: **1** :: Views: **737**

How to add the **gaussian** **noise** in the simulaiton?
Who can teach me the equation of **gaussian** **noise**?
Thank you!

Electromagnetic Design and Simulation :: 12-19-2008 01:38 :: yetian :: Replies: **2** :: Views: **2483**

Hello to all
I am to modellizate a RF LNA in matlab, but I have a problem with the **noise** figure model. To model it I defined the variance of the **white** **gaussian** **noise** as:
4*k*T*R*(NF-1)*fs
where NF is the lineare **noise** factor and the fs is the frequency simulation. I multiplied this value for the (...)

Digital Signal Processing :: 01-23-2009 07:09 :: dinone :: Replies: **0** :: Views: **1742**

Helllo..
please tell me Is it possible to calculate the power of **white** Gauusian **noise**??? if yes then Howw???

Digital Signal Processing :: 03-26-2009 14:56 :: ednan :: Replies: **3** :: Views: **1346**

Halooo~~~
I'm new in Matlab software,recently my supervisor given me a task.:X use any function in Image Processing Tools to generate **gaussian** **noise**,and i have to develop **gaussian** **noise** by using pdf or its equation with its mean and Standard Variense as parameter and add it to a image.Can somebody help me for that le? (...)

Digital Signal Processing :: 10-04-2009 00:19 :: vinsley :: Replies: **1** :: Views: **2429**

your transmitted waveform is juat a sum of a sine and cosine, and so the signal power = 1 (A sine 's/cosine's power is 1/2, and they can added since they are orthogonal)
to be more exact
signal power = 1/T ∫ (from -T/2 to T/2) (sin (2*pi *t /T) + cos (2*pi *t /T) )^2 dt = 1
Since all possible symbols have same power (all constellatio

Digital communication :: 12-15-2009 11:14 :: bulx :: Replies: **3** :: Views: **3253**

Your code:
x = 1000;
y = 1000;
h = wgn(x,y,10);
Generates a 1000x1000 matrix of **white** **gaussian** **noise** in decibels, is that what you want?
If you are after adding a **noise** signal to signal or collection of data, you can use some like:
t = 0:.001:.25;
x = sin(2*pi*60*t); //60 Hz Sine Wave
y = x + (...)

Digital Signal Processing :: 03-15-2010 04:04 :: bigdogguru :: Replies: **4** :: Views: **3215**

I want to generate the **gaussian** **noise** with the floor of -174dBm/Hz and 2MHz bandwidth. The **noise** power is supposed to be -111dBm.
Does any one help me to set up the variance or other parameters for the module "**gaussian** **noise** Generater"/"AWGN Channel" in Simulink? Thanks!

Digital communication :: 01-23-2011 09:17 :: firephenix405 :: Replies: **0** :: Views: **1100**

can anyone help me with the power supply **noise** effcet on phase **noise** of a ring oscillator in hspicerf?
I have read the mannual of hspicerf, it says i can model the **noise** source with an E element ot G element.
here comes the question, how can i model it? should i model it into a **white** **noise** or (...)

Analog Circuit Design :: 02-27-2012 01:28 :: sityeven :: Replies: **0** :: Views: **479**

Hi,
in QPSK system:
what are the matlab equations for **noise** and fading channel?
also;
what is the theoritical equation for calculating BER?
this is because I see several different formula, for example:
1-
N0 = 1/10^(SNR(i)/10);
n = sqrt(N0/2)*(randn(1,length(sig))+1i*randn(1,length(sig)));
h = sqrt(0.5*((randn(1,length(sig)))

Digital communication :: 04-22-2013 16:14 :: barznjy :: Replies: **2** :: Views: **613**

i need the matlab code for the generation of statistical **gaussian** **noise**...if anyone have it, please provide me with it...
Thank you..

Digital communication :: 05-01-2013 04:46 :: Lekshmi B S :: Replies: **0** :: Views: **425**

i want to get statistical **gaussian** **noise**...i read that wgn, awgn and randn generates pseudorandom will it be better to use this equation which creates **gaussian** distribution..?
**noise**=(sqrt(1/(((2*pi)^N)*det(Q))))*(exp((-x'*inv(Q)*x)/2));
where Q is the **noise** covariance matrix.

Digital communication :: 05-02-2013 00:37 :: Lekshmi B S :: Replies: **0** :: Views: **239**

I am doing a simulation involving microwave antennas for image reconstruction. I would like to add **white** **gaussian** **noise** to my image in order to apply analog filter to filter out the **noise**.
However, I have to no idea on how to add the **noise** to my image.
Hope to get some ideas from fellow experts.
Thanks in (...)

Electromagnetic Design and Simulation :: 07-08-2013 01:58 :: nsw1216 :: Replies: **2** :: Views: **274**

Hi,
received sequence,r(n)=s(n)+v(n)
s(n)=+-1 is the data sequence and v(n) is a **gaussian** **noise** sequnce.
Decision ckt :if r(n)>0 then 1
r(n)<0 then 0
Now i have to estimate BEP for SNR of 0 to 10 in 1dB increment.
Should i use awgn function for the **gaussian** **noise** sequence? Please let me know how (...)

Digital communication :: 07-05-2013 18:21 :: ryder :: Replies: **8** :: Views: **500**

Hello all,
I want to determine the power level (dB amp) of (supposed to be wgn) random signal using oscilloscope data. I have compiled a code to do the job but when tried to verify my code for several different signals (periodic sinus, random **gaussian**) generated on MATLAB, I have seen that the code yields different power levels for different sig

Digital Signal Processing :: 07-17-2013 05:32 :: von Moltke :: Replies: **0** :: Views: **306**

Hello,
I have some non **gaussian** **noise** measurements and I want to find a statistical model that best represents those measurements.
The statistical models that I used for comparison are Middleton Class A , Alpha stable and the normal **gaussian** distributions.
First I calculated the PDF and the CCDF of the measurements and of each one the (...)

Digital Signal Processing :: 10-21-2014 10:37 :: ismail bsa :: Replies: **1** :: Views: **364**

I'm simulating Direct Sequence BPSK system in Matlab.
The spreading sequency is 24 bit length, i.e 24 bits spreading for every data bit.
However, when I'm simulating it I get better results than theoretical.
I think I don't use correctly with "awgn" function in matlab
The syntax is:
Y = AWGN(X,SNR) adds **white** **gaussian** **noise** to X. (...)

Digital Signal Processing :: 07-10-2005 02:12 :: DimaA :: Replies: **0** :: Views: **776**

1)amplitude modulation is linear modulation and angle modulation falls under non linear modulation...
2)AWGN...additive **white** gausian **noise**...
**noise** will add with will have gaussion distribution....its value will a constant one for all frequencies..for that it is called with name tag "**white**"

Electronic Elementary Questions :: 02-10-2006 08:12 :: electronics_kumar :: Replies: **3** :: Views: **845**

AWGN and rayleigh?
AWGN effect is additive wheras rayleigh is multiplicative (that is why it fades some data).
AWGN means additive **white** **gaussian** **noise**. so the **noise** is assumed to be normally distributed with mean zero.
Now, imagin the random variable Z = X + j Y where X and Y are both normally distributted (...)

Digital Signal Processing :: 03-04-2006 16:28 :: tiger_shark :: Replies: **1** :: Views: **1353**

In a CDMA receiver, there are two **noise** sources of interference that are purely **white** **gaussian** **noise**:
-The receiver's input referred thermal **noise** power spectral density No.
-The transmitter's thermal **noise** power spectral density in the receive frequency band.
In your case definitely (...)

RF, Microwave, Antennas and Optics :: 03-18-2006 15:28 :: vfone :: Replies: **3** :: Views: **778**

encode the signal the modualtion at the rec

Digital communication :: 04-05-2006 10:46 :: Maya Laxman Sawant :: Replies: **0** :: Views: **2132**

Ioc cell interference power density
Ior total trnsmitted power densityby mobile.
Ioc / Ior means SIR of received signal
to get it from link level simulation for additive **white** **gaussian** **noise** (AWGN)

Digital communication :: 08-11-2006 11:04 :: islamatef :: Replies: **2** :: Views: **1271**

I need ,atlab file for
link level simulation for single additive **white** **gaussian** **noise** (AWGN)

Digital communication :: 08-12-2006 11:41 :: islamatef :: Replies: **0** :: Views: **478**

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